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Deep Hole Drilling – Technical Info

Microbore® Deep Hole Drilling - Technical Information

Home » Technical Info » Deep Hole Drilling – Technical Info

Inserts & pads compatible with other proven systems

Product Code

Order No.

Quantity Required

Screw

Wrench

Drill Head

J Ø 25.00 – J Ø 28.70

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Insert

1

M2.2JK

T7

Middle Insert

1

M2.2JK

T7

Central Insert

1

M2.2JK

T7

Guide Pad

2

M2.5

T8

Drill Head

J Ø 28.71 – J Ø 30.70

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Insert

1

M2.2JK

T7

Middle Insert

1

M2.2JK

T7

Central Insert

1

M2.5JK

T7

Guide Pad

2

M2.5

T8

Drill Head

J Ø 30.71 – J Ø 34.90

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Insert

1

M2.5JK

T7

Middle Insert

1

M2.5JK

T7

Central Insert

1

M2.5JK

T7

Guide Pad

2

M2.5

T8

Drill Head

J Ø 34.91 – J Ø 35.50

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Insert

1

M2.5JK

T7

Middle Insert

1

M2.5JK

T7

Central Insert

1

M2.5JK

T7

Guide Pad

2

M3

T10

Drill Head

J Ø 35.51 – J Ø 38.90

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Insert

1

M2.5JK

T7

Middle Insert

1

M2.5JK

T7

Central Insert

1

M2.5JK

T7

Guide Pad

2

M3

T10

Drill Head

J Ø 38.91 – J Ø 42.90

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Insert

1

M2.5JK

T7

Middle Insert

1

M2.5JK

T7

Central Insert

1

M2.5JK

T7

Guide Pad

2

M3

T10

Drill Head

J Ø 42.91 – J Ø 47.90

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Insert

1

M2.5JK

T7

Middle Insert

1

M2.5JK

T7

Central Insert

1

M2.5JK

T7

Guide Pad

2

M3

T10

Drill Head

J Ø 47.91 – J Ø 49.40

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Insert

1

M2.5JK

T7

Middle Insert

1

M2.5JK

T7

Central Insert

1

M2.5JK

T7

Guide Pad

2

M3

T10

Drill Head

J Ø 49.41 – J Ø 52.50

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Insert

1

M2.5JK

T7

Middle Insert

1

M2.5JK

T7

Central Insert

1

M2.5JK

T7

Guide Pad

2

M5

T20

Drill Head

J Ø 52.51 – J Ø 54.90

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Insert

1

M2.5JK

T7

Middle Insert

1

M2.5JK

T7

Central Insert

1

M2.5JK

T7

Guide Pad

2

M5

T20

Drill Head

J Ø 54.91 – J Ø 58.30

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Insert

1

M2.5JK

T7

Middle Insert

1

M2.5JK

T7

Central Insert

1

M2.5JK

T7

Guide Pad

2

M5

T20

Drill Head

J Ø 58.31 – J Ø 64.50

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Insert

1

M2.5JK

T7

Middle Insert

1

M2.5JK

T7

Central Insert

1

M2.5JK

T7

Guide Pad

2

M5

T20

Guide Pad

Order No.

Dia Range

Quantity Required

DQ06A

ø 25.00 ~ ø 31.00

2

DQ07A

ø 31.01 ~ ø 39.60

2

DQ08A

ø 39.61 ~ ø 47.00

2

DQ10A

ø 47.01 ~ ø 54.99

2

DQ12A

ø 55.00 ~ ø 65.00

2

Auxiliary Pad

Order No.

Dia Range

Quantity Required

ø 25.00 ~ ø 28.70

1

ø 28.71 ~ ø 34.90

1

ø 34.91 ~ ø 47.90

3

ø 47.91 ~ ø 64.50

3

Insert with universal chip breaker

Peripheric Insert

Order No.

Dia Range

ø 25.00 ~ ø 28.70

ø 28.71 ~ ø 30.70

ø 30.71 ~ ø 34.90

ø 34.91 ~ ø 38.90

ø 38.91 ~ ø 42.90

ø 42.91 ~ ø 47.90

ø 47.91 ~ ø 52.50

ø 52.51 ~ ø 54.90

ø 54.91 ~ ø 58.30

ø 58.31 ~ ø 64.50

Middle Insert

Order No.

Dia Range

ø 25.00 ~ ø 28.70

ø 28.71 ~ ø 30.70

ø 30.71 ~ ø 34.90

ø 34.91 ~ ø 38.90

ø 38.91 ~ ø 42.90

ø 42.91 ~ ø 47.90

ø 47.91 ~ ø 52.50

ø 52.51 ~ ø 54.90

ø 54.91 ~ ø 58.30

ø 58.31 ~ ø 64.50

Central Insert

Order No.

Dia Range

ø 25.00 ~ ø 28.70

ø 28.71 ~ ø 30.70

ø 30.71 ~ ø 34.90

ø 34.91 ~ ø 38.90

ø 38.91 ~ ø 42.90

ø 42.91 ~ ø 47.90

ø 47.91 ~ ø 52.50

ø 52.51 ~ ø 54.90

ø 54.91 ~ ø 58.30

ø 58.31 ~ ø 64.50

Insert with special chip breaker (suitable for hard chip-breaking)

Peripheric Insert

Order No.

Dia Range

ø 25.00 ~ ø 28.70

ø 28.71 ~ ø 30.70

ø 30.71 ~ ø 34.90

ø 34.91 ~ ø 38.90

ø 38.91 ~ ø 42.90

ø 42.91 ~ ø 47.90

ø 47.91 ~ ø 52.50

ø 52.51 ~ ø 54.90

ø 54.91 ~ ø 58.10

ø 58.11 ~ ø 64.50

Middle Insert

Order No.

Dia Range

ø 25.00 ~ ø 28.70

ø 28.71 ~ ø 30.70

ø 30.71 ~ ø 34.90

ø 34.91 ~ ø 38.90

ø 38.91 ~ ø 42.90

ø 42.91 ~ ø 47.90

ø 47.91 ~ ø 52.50

ø 52.51 ~ ø 54.90

ø 54.91 ~ ø 58.30

ø 58.31 ~ ø 64.50

Central Insert

Order No.

Dia Range

ø 25.00 ~ ø 28.70

ø 28.71 ~ ø 30.70

ø 30.71 ~ ø 34.90

ø 34.91 ~ ø 38.90

ø 38.91 ~ ø 42.90

ø 42.91 ~ ø 47.90

ø 47.91 ~ ø 52.50

ø 52.51 ~ ø 54.90

ø 54.91 ~ ø 58.30

ø 58.31 ~ ø 64.50

Inserts & pads compatible with other proven systems

Product Code

Order No.

Quantity Required

Screw

Wrench

Drill Head

J Ø 49.50DZ – J Ø 52.50DZ

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M4-N

HG-3

Middle Pocket

1

M4

T15

Central Pocket

1

M4

T15

Peripheric Insert

1

M2.5JK

T7

Middle Insert

1

M2.5JK

T7

Central Insert

1

M2.5JK

T7

Guide Pad

3

M4

T15

Drill Head

J Ø 52.51DZ – J Ø 54.90DZ

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M4-N

HG-3

Middle Pocket

1

M4

T15

Central Pocket

1

M4

T15

Peripheric Insert

1

M2.5JK

T7

Middle Insert

1

M2.5JK

T7

Central Insert

1

M2.5JK

T7

Guide Pad

3

M4

T15

Drill Head

J Ø 54.91DZ – J Ø 58.30DZ

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M4-N

HG-3

Middle Pocket

1

M4

T15

Central Pocket

1

M4

T15

Peripheric Insert

1

M2.5JK

T7

Middle Insert

1

M2.5JK

T7

Central Insert

1

M2.5JK

T7

Guide Pad

3

M4

T15

Drill Head

J Ø 58.31DZ – J Ø 64.50DZ

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M4-N

HG-3

Middle Pocket

1

M4

T15

Central Pocket

1

M4

T15

Peripheric Insert

1

M2.5JK

T7

Middle Insert

1

M2.5JK

T7

Central Insert

1

M2.5JK

T7

Guide Pad

3

M4

T15

Insert with universal chip breaker

Peripheric Pocket

Order No.

Peripheric Insert

Order No.

Middle Pocket

Order No.

Middle Insert

Order No.

Central Pocket

Order No.

Central Insert

Order No.

Insert with special chip breaker (suitable for hard chip-breaking)

Peripheric Pocket

Order No.

Peripheric Insert

Order No.

Middle Pocket

Order No.

Middle Insert

Order No.

Central Pocket

Order No.

Central Insert

Order No.

Inserts & pads compatible with other proven systems

Product Code

Order No.

Quantity Required

Screw

Wrench

Drill Head

SJ Ø 65.00 – SJ Ø 65.59

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M5-N

HG-4

Middle Pocket

1

M5

T20

Central Pocket

1

M5

T20

Peripheric Insert

1

M3

T10

Middle Insert

1

M3

T10

Central Insert

1

M3

T10

Guide Pad

3

M5

T20

Drill Head

SJ Ø 65.60 – SJ Ø 68.39

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M5-N

HG-4

Middle Pocket

1

M5

T20

Central Pocket

1

M5

T20

Peripheric Insert

1

M3

T10

Middle Insert

1

M3

T10

Central Insert

1

M3

T10

Guide Pad

3

M5

T20

Drill Head

SJ Ø 68.40 – SJ Ø 73.49

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M5-N

HG-4

Middle Pocket

1

M5

T20

Central Pocket

1

M5

T20

Peripheric Insert

1

M3

T10

Middle Insert

1

M3

T10

Central Insert

1

M3

T10

Guide Pad

3

M5

T20

Drill Head

SJ Ø 73.50 – SJ Ø 79.99

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M6-N

HG-5

Middle Pocket

1

M5

T20

Central Pocket

1

M5

T20

Peripheric Insert

1

M4

T15

Middle Insert

1

M3

T10

Central Insert

1

M3

T10

Guide Pad

3

M5

T20

Drill Head

SJ Ø 80.00 – SJ Ø 82.69

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M6-N

HG-5

Middle Pocket

1

M5

T20

Central Pocket

1

M5

T20

Peripheric Insert

1

M4

T15

Middle Insert

1

M3

T10

Central Insert

1

M3

T10

Guide Pad

3

M5

T20

Drill Head

SJ Ø 82.70 – SJ Ø 90.49

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M6-N

HG-5

Middle Pocket

1

M5

T20

Central Pocket

1

M5

T20

Peripheric Insert

1

M4

T15

Middle Insert

1

M3

T10

Central Insert

1

M4

T15

Guide Pad

3

M5

T20

Drill Head

SJ Ø 90.50 – SJ Ø 106.99

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M6-N

HG-5

Middle Pocket

1

M5

T20

Central Pocket

1

M5

T20

Peripheric Insert

1

M4

T15

Middle Insert

1

M4

T15

Central Insert

1

M4

T15

Guide Pad

3

M5

T20

Drill Head

SJ Ø 107.00 – SJ Ø 120.00

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M5-N

HG-4

Middle Pocket

3

M5

T20

Central Pocket

1

M5

T20

Peripheric Insert

1

M3

T10

Middle Insert

3

M3

T10

Central Insert

1

M3

T10

Guide Pad

4

M5

T20

Drill Head

SJ Ø 120.01 – SJ Ø 125.00

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M6-N

HG-5

Middle Pocket

1

M5

T20

Central Pocket

1

M5

T20

Peripheric Insert

1

M4

T15

Middle Insert

3

M3

T10

Central Insert

1

M3

T10

Guide Pad

4

M5

T20

Insert with universal chip breaker

Peripheric Pocket

Order No.

Peripheric Insert

Order No.

Middle Pocket

Order No.

Middle Insert

Order No.

Central Pocket

Order No.

Central Insert

Order No.

Insert with special chip breaker (suitable for hard chip-breaking)

Peripheric Pocket

Order No.

Peripheric Insert

Order No.

Middle Pocket

Order No.

Middle Insert

Order No.

Central Pocket

Order No.

Central Insert

Order No.

Inserts & pads compatible with other proven systems

Product Code

Order No.

Quantity Required

Screw

Wrench

Drill Head

J Ø 64.51 – J Ø 65.59

1

Universal Chip Breaker

Efficient Processing
Groove Insert

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M5-N

HG-4

Middle Pocket

1

M5

T20

Central Pocket

1

M5

T20

Peripheric Insert

1

M3

T10

Middle Insert

1

M3

T10

Central Insert

1

M3

T10

Guide Pad

3

M5

T20

Drill Head

J Ø 65.60 – J Ø 68.39

1

Universal Chip Breaker

Efficient Processing
Groove Insert

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M5-N

HG-4

Middle Pocket

1

M5

T20

Central Pocket

1

M5

T20

Peripheric Insert

1

M3

T10

Middle Insert

1

M3

T10

Central Insert

1

M3

T10

Guide Pad

3

M5

T20

Drill Head

J Ø 68.40 – J Ø 72.99

1

Universal Chip Breaker

Efficient Processing
Groove Insert

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M5-N

HG-4

Middle Pocket

1

M5

T20

Central Pocket

1

M5

T20

Peripheric Insert

1

M3

T10

Middle Insert

1

M3

T10

Central Insert

1

M3

T10

Guide Pad

3

M5

T20

Drill Head

J Ø 73.00 – J Ø 79.99

1

Universal Chip Breaker

Efficient Processing
Groove Insert

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M6-N

HG-5

Middle Pocket

1

M5

T20

Central Pocket

1

M5

T20

Peripheric Insert

1

M4

T15

Middle Insert

1

M3

T10

Central Insert

1

M3

T10

Guide Pad

3

M5

T20

Drill Head

J Ø 80.00 – J Ø 82.69

1

Universal Chip Breaker

Efficient Processing
Groove Insert

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M6-N

HG-5

Middle Pocket

1

M5

T20

Central Pocket

1

M5

T20

Peripheric Insert

1

M4

T15

Middle Insert

1

M3

T10

Central Insert

1

M3

T10

Guide Pad

3

M5

T20

Drill Head

J Ø 82.70 – J Ø 90.49

1

Universal Chip Breaker

Efficient Processing
Groove Insert

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M6-N

HG-5

Middle Pocket

1

M5

T20

Central Pocket

1

M5

T20

Peripheric Insert

1

M4

T15

Middle Insert

1

M3.5

T15

Central Insert

1

M3

T10

Guide Pad

3

M5

T20

Drill Head

J Ø 90.50 – J Ø 106.99

1

Universal Chip Breaker

Efficient Processing
Groove Insert

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M6-N

HG-5

Middle Pocket

1

M5

T20

Central Pocket

1

M5

T20

Peripheric Insert

1

M4

T15

Middle Insert

1

M3.5

T15

Central Insert

1

M3.5

T15

Guide Pad

3

M5

T20

Drill Head

J Ø 107.00 – J Ø 120.00

1

Universal Chip Breaker

Efficient Processing
Groove Insert

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M5-N

HG-4

Middle Pocket

3

M5

T20

Central Pocket

1

M5

T20

Peripheric Insert

1

M3

T10

Middle Insert

3

M3

T10

Central Insert

1

M3

T10

Guide Pad

4

M5

T20

Drill Head

J Ø 120.01 – J Ø 125.00

1

Universal Chip Breaker

Efficient Processing
Groove Insert

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M6-N

HG-5

Middle Pocket

3

M5

T20

Central Pocket

1

M5

T20

Peripheric Insert

1

M3

T10

Middle Insert

3

M3

T10

Central Insert

1

M3

T10

Guide Pad

4

M5

T20

Insert with universal chip breaker

Peripheric Pocket

Order No.

Peripheric Insert

Order No.

Middle Pocket

Order No.

Middle Insert

Order No.

Central Pocket

Order No.

Central Insert

Order No.

Efficient processing groove insert

Peripheric Pocket

Order No.

Peripheric Insert

Order No.

Middle Pocket

Order No.

Middle Insert

Order No.

Central Pocket

Order No.

Central Insert

Order No.

Insert with special chip breaker(suitable for hard chip-breaking)

Peripheric Pocket

Order No.

Peripheric Insert

Order No.

Middle Pocket

Order No.

Middle Insert

Order No.

Central Pocket

Order No.

Central Insert

Order No.

Inserts & pads compatible with other proven systems

Product Code

Order No.

Quantity Required

Screw

Wrench

Drill Head

IJ Ø 48.00 – IJ Ø 51.99

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M3.5-N

HG-2.5

Middle Pocket

1

M4

T15

Central Pocket

1

M4

T15

Peripheric Insert

1

M2.5

T7

Middle Insert

1

M2.5

T7

Central Insert

1

M2.5

T7

Guide Pad

3

M4

T15

Drill Head

IJ Ø 52.00 – IJ Ø 54.99

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M5-N

HG-4

Middle Pocket

1

M4

T15

Central Pocket

1

M4

T15

Peripheric Insert

1

M3.5

T15

Middle Insert

1

M2.5

T7

Central Insert

1

M2.5

T7

Guide Pad

3

M4

T15

Drill Head

IJ Ø 55.00 – IJ Ø 57.99

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M5-N

HG-4

Middle Pocket

1

M4

T15

Central Pocket

1

M4

T15

Peripheric Insert

1

M3.5

T15

Middle Insert

1

M2.5

T7

Central Insert

1

M3.5

T15

Guide Pad

3

M4

T15

Drill Head

IJ Ø 58.00 – IJ Ø 63.99

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M5-N

HG-4

Middle Pocket

1

M4

T15

Central Pocket

1

M4

T15

Peripheric Insert

1

M3.5

T15

Middle Insert

1

M3.5

T15

Central Insert

1

M3.5

T15

Guide Pad

3

M4

T15

Drill Head

IJ Ø 64.00 – IJ Ø 67.99

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M5-N

HG-4

Middle Pocket

1

M4

T15

Central Pocket

1

M4

T15

Peripheric Insert

1

M4

T15

Middle Insert

1

M3.5

T15

Central Insert

1

M3.5

T15

Guide Pad

3

M5

T20

Drill Head

IJ Ø 68.00 – IJ Ø 77.99

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M5-N

HG-4

Middle Pocket

1

M5

T20

Central Pocket

1

M5

T20

Peripheric Insert

1

M3.5

T15

Middle Insert

1

M4

T15

Central Insert

1

M4

T15

Guide Pad

3

M5

T20

Drill Head

IJ Ø 78.00 – IJ Ø 84.99

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M5-N

HG-4

Middle Pocket

1

M5

T20

Central Pocket

1

M5

T20

Peripheric Insert

1

M4

T15

Middle Insert

1

M4

T15

Central Insert

1

M4

T15

Guide Pad

3

M5

T20

Drill Head

IJ Ø 85.00 – IJ Ø 91.99

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M6-N

HG-5

Middle Pocket

1

M5

T20

Central Pocket

1

M5

T20

Peripheric Insert

1

M5

T20

Middle Insert

1

M4

T15

Central Insert

1

M4

T15

Guide Pad

3

M5

T20

Drill Head

IJ Ø 92.00 – IJ Ø 98.99

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M5-N

HG-4

Middle Pocket

1

M5

T20

Central Pocket

1

M5

T20

Peripheric Insert

1

M4

T15

Middle Insert

1

M5

T20

Central Insert

1

M5

T20

Guide Pad

3

M5

T20

Drill Head

IJ Ø 99.00 – IJ Ø 106.99

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M6-N

HG-5

Middle Pocket

1

M5

T20

Central Pocket

1

M5

T20

Peripheric Insert

1

M5

T20

Middle Insert

1

M5

T20

Central Insert

1

M5

T20

Guide Pad

3

M5

T20

Drill Head

IJ Ø 107.00 – IJ Ø 117.99

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M5-N

HG-4

Middle Pocket

3

M4

T15

Central Pocket

1

M5

T20

Peripheric Insert

1

M4

T15

Middle Insert

3

M3.5

T15

Central Insert

1

M4

T15

Guide Pad

4

M5

T20

Drill Head

IJ Ø 118.00 – IJ Ø 125.00

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M5-N

HG-4

Middle Pocket

3

M5

T20

Central Pocket

1

M5

T20

Peripheric Insert

1

M4

T15

Middle Insert

3

M4

T15

Central Insert

1

M4

T15

Guide Pad

4

M5

T20

Insert with Universal Chip Breaker

Peripheric Pocket

Order No.

Peripheric Insert

Order No.

Middle Pocket

Order No.

Middle Insert

Order No.

Central Pocket

Order No.

Central Insert

Order No.

Insert with special chip breaker(suitable for hard chip-breaking)

Peripheric Pocket

Order No.

Peripheric Insert

Order No.

Middle Pocket

Order No.

Middle Insert

Order No.

Central Pocket

Order No.

Central Insert

Order No.

Indexable Counterbore with Insert Only
As Per Request

Product Code

Order No.


Quantity Required

Screw

Wrench

Drill Head

JK Ø 25.00 – JK Ø 28.70

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Insert

1

M2.2JK

T7

Guide Pad

2

M2.5

T8

Auxiliary Pad

1

M2.5

T8

Bakelite guide pad

1

M2.5

T8

Drill Head

JK Ø 28.71 – JK Ø 30.70

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Insert

1

M2.2JK

T7

Guide Pad

2

M2.5

T8

Auxiliary Pad

1

M2.5

T8

Bakelite Guide Pad

1

M2.5

T8

Drill Head

JK Ø 30.71 – JK Ø 34.90

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Insert

1

M2.5JK

T7

Guide Pad

2

M2.5

T8

Auxiliary Pad

1

M2.5

T8

Bakelite Guide Pad

1

M2.5

T8

Drill Head

JK Ø 34.91 – JK Ø 38.90

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Insert

1

M2.5JK

T7

Guide Pad

2

M3

T10

Auxiliary Pad

1

M3

T10

Bakelite Guide Pad

1

M3

T10

Drill Head

JK Ø 38.91 – JK Ø 47.90

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Insert

1

M2.5JK

T7

Guide Pad

2

M3

T10

Auxiliary Pad

1

M3

T10

Bakelite Guide Pad

1

M3

T10

Drill Head

JK Ø 47.91 – JK Ø 49.40

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Insert

1

M2.5JK

T7

Guide Pad

2

M3

T10

Auxiliary Pad

1

M3

T10

Bakelite Guide Pad

1

M3

T10

Drill Head

JK Ø 49.41 – JK Ø 65.00

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Insert

1

M2.5JK

T7

Guide Pad

2

M5

T20

Auxiliary Pad

1

M3

T10

Bakelite Guide Pad

1

M5

T20

Refer to deep drills for inserts chip breaker.
Special design as per customer’s request is available.
Auxiliary guide pad and bakelite guide pad are optional as per customer’s request.

As Per Request

Product Code

Order No.

Quantity Required

Screw

Wrench

Drill Head

JK Ø 45.00DZ – JK Ø 47.99DZ

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M4-N

HG-3

Peripheric Insert

1

M2.5JK

T7

Guide Pad

3

M3

T10

Auxiliary Guide Pad

1

M3

T10

Bakelite Pad

1

M3

T10

Drill Head

JK Ø 48.00DZ – JK Ø 49.49DZ

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M4-N

HG-3

Peripheric Insert

1

M2.5JK

T7

Guide Pad

3

M3

T10

Auxiliary Guide Pad

1

M3

T10

Bakelite Pad

1

M3

T10

Drill Head

JK Ø 49.50DZ – JK Ø 64.99DZ

1

Universal Chip Breaker

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M4-N

HG-3

Peripheric Insert

1

M2.5JK

T7

Guide Pad

3

M5

T20

Auxiliary Guide Pad

1

M3

T10

Bakelite Pad

1

M5

T20

Drill Head

JK Ø 65.00DZ – JK Ø 72.99DZ

1

Universal Chip Breaker

Efficient Processing
Groove Insert

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M5-N

HG-4

Peripheric Insert

1

M3

T10

Guide Pad

3

M5

T20

Auxiliary Guide Pad

1

M3

T10

Bakelite Pad

1

M5

T20

Drill Head

JK Ø 73.00DZ – JK Ø 79.99DZ

1

Universal Chip Breaker

Efficient Processing
Groove Insert

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M6-N

HG-5

Peripheric Insert

1

M4

T15

Guide Pad

3

M5

T20

Auxiliary Guide Pad

1

M3

T10

Bakelite Pad

1

M5

T20

Drill Head

JK Ø 80.00DZ – JK Ø 106.99DZ

1

Universal Chip Breaker

Efficient Processing
Groove Insert

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M6-N

HG-5

Peripheric Insert

1

M4

T15

Guide Pad

3

M5

T20

Auxiliary Guide Pad

1

M3

T10

Bakelite Pad

1

M5

T20

Drill Head

JK Ø 107.00DZ – JK Ø 180.00DZ

1

Universal Chip Breaker

Efficient Processing
Groove Insert

Special Chip Breaker
(suitable for hard chip-breaking)

Peripheric Pocket

1

M6-N

HG-5

Peripheric Insert

1

M4

T15

Guide Pad

5

M5

T20

Auxiliary Guide Pad

1

M3

T10

Bakelite Pad

1

M5

T20

Applied on Heat Exchanger Machining in Power Generation and Chemical Industry

Tube sheet is widely used in chemical container, pressure vessel, power generation equipment, boiler, condenser, central air conditioning, evaporator, seawater desalination and other industries with main features of multiple holes, small apertures, dense holes, high accuracy and surface finish requirements in the sheet. BTA style drilling tools are more suitable for tube sheet drilling considering production efficiency and holes quality. It is also a trend for selecting drill bits of tube sheet. Both machines and tube sheet quality will significantly influence equipment assembly and performance.

Microbore introduces two types of BTA deep hole drilling Type 5 and Type 6 based on different processing.

  • Type 6 is a special deep hole drilling for tube sheet, applicable for advanced tube sheet deep hole processing.
  • Type 5 is for less advanced tube sheet deep hole drilling.

Type 6

Order No.

Diameter

Dimension

L

d3

d5

L1

GB6-Dxx.xx-SK

ø15.60 – ø16.20

43

10.8

12.6

20

GB6-Dxx.xx-SK

ø16.21 – ø16.70

43

10.8

12.6

20

GB6-Dxx.xx-SK

ø16.71 – ø17.20

43

11.8

13.6

20

GB6-Dxx.xx-SK

ø17.21 – ø17.70

43

11.8

13.6

20

GB6-Dxx.xx-SK

ø17.71 – ø18.40

47

12.5

14.5

21.5

GB6-Dxx.xx-SK

ø18.41 – ø18.90

47

12.5

14.5

21.5

GB6-Dxx.xx-SK

ø18.91 – ø19.20

47

13.5

15.5

21.5

GB6-Dxx.xx-SK

ø19.21 – ø20.00

47

13.5

15.5

21.5

GB6-Dxx.xx-SK

ø20.01 – ø20.90

52.5

14

16

21.5

GB6-Dxx.xx-SK

ø20.91 – ø21.80

52.5

14

16

21.5

GB6-Dxx.xx-SK

ø21.81 – ø22.90

56

16

18

21.5

GB6-Dxx.xx-SK

ø22.91 – ø24.10

56

16

18

21.5

GB6-Dxx.xx-SK

ø24.11 – ø25.20

57.5

17.5

19.5

21.5

GB6-Dxx.xx-SK

ø25.21 – ø26.40

57.5

17.5

19.5

21.5

Type 5

Order No.

Diameter

Dimension

L

d3

d5

L1

GB5-Dxx.xx-DK

ø15.60 – ø16.20

43

10.8

12.6

20

GB5-Dxx.xx-DK

ø16.21 – ø16.70

43

10.8

12.6

20

GB5-Dxx.xx-DK

ø16.71 – ø17.20

43

11.8

13.6

20

GB5-Dxx.xx-DK

ø17.21 – ø17.70

43

11.8

13.6

20

GB5-Dxx.xx-DK

ø17.71 – ø18.40

47

12.5

14.5

21.5

GB5-Dxx.xx-DK

ø18.41 – ø18.90

47

12.5

14.5

21.5

GB5-Dxx.xx-DK

ø18.91 – ø19.20

47

13.5

15.5

21.5

GB5-Dxx.xx-DK

ø19.21 – ø20.00

47

13.5

15.5

21.5

GB5-Dxx.xx-DK

ø20.01 – ø20.90

52.5

14

16

21.5

Order No.

Diameter

Dimension

L

d3

d5

L1

GB5-Dxx.xx-SK

ø20.91 – ø21.80

52.5

14

16

21.5

GB5-Dxx.xx-SK

ø21.81 – ø22.90

56

16

18

21.5

GB5-Dxx.xx-SK

ø22.91 – ø24.10

56

16

18

21.5

GB5-Dxx.xx-SK

ø24.11 – ø25.20

57.5

17.5

19.5

21.5

GB5-Dxx.xx-SK

ø25.21 – ø26.40

57.5

17.5

19.5

21.5

Carbide gundrill is applicable for deep holes that maintains drilling accuracy at IT6-IT10, length/dia ration over 100 and Ra < 3 micron.

Dia Range

d1

L1

L2

L

ø4.50 – ø9.99

16

45

31

As per request

ø10.00 – ø13.99

20

63

34

As per request

ø14.00 – ø20.00

25

70

34

As per request

ø20.01 – ø30.00

32

70

34

As per request

Carbide Gundrill Recomended Cutting Parameter

Material

HB

Cutting Speed

4.50 – 6.30

6.00 – 12.50

12.50 – 40.50

Carbon Steel

90 – 200

60 – 120

0.005 – 0.030

0.015 – 0.055

0.020 – 0.110

125 – 225

50 – 120

0.005 – 0.030

0.015 – 0.055

0.020 – 0.110

150 – 250

40 – 100

0.004 – 0.025

0.010 – 0.050

0.020 – 0.100

Low Alloy

150 – 260

40 – 120

0.004 – 0.030

0.010 – 0.055

0.020 – 0.110

220 – 450

40 – 120

0.004 – 0.025

0.010 – 0.050

0.020 – 0.100

High Alloy

150 – 250

40 – 100

0.004 – 0.025

0.010 – 0.050

0.020 – 0.100

250 – 350

50 – 100

0.005 – 0.025

0.010 – 0.050

0.030 – 0.100

Cast Steel

90 – 225

50 – 120

0.005 – 0.030

0.010 – 0.055

0.020 – 0.110

150 – 250

40 – 100

0.004 – 0.025

0.010 – 0.050

0.020 – 0.100

Femitic Stainless Steel

150 – 270

40 – 90

0.004 – 0.025

0.010 – 0.040

0.020 – 0.100

Martensitic Stainless Steel

Austensitic Stainless Steel

150 – 275

40 – 90

0.004 – 0.025

0.010 – 0.040

0.020 – 0.100

Mallezable Cast Iron

110 – 145

70 – 90

0.008 – 0.030

0.020 – 0.070

0.050 – 0.190

150 – 270

60 – 90

0.005 – 0.030

0.010 – 0.070

0.030 – 0.190

Gary Cast Iron

150 – 220

60 – 90

0.005 – 0.030

0.010 – 0.070

0.030 – 0.190

200 – 330

15 – 90

0.003 – 0.030

0.005 – 0.070

0.010 – 0.190

Milling Cast Iron

125 – 230

70 – 90

0.008 – 0.030

0.020 – 0.070

0.050 – 0.190

200 – 300

60 – 90

0.005 – 0.030

0.010 – 0.070

0.030 – 0.190

Aluminium Alloy

40 – 100

65 – 300

0.005 – 0.040

0.020 – 0.070

0.030 – 0.150

70 – 160

65 – 300

0.005 – 0.040

0.020 – 0.070

0.030 – 0.150

Copper and Copper Alloy

50 – 200

65 – 300

0.005 – 0.040

0.020 – 0.070

0.030 – 0.150

Carbide deep hole drill is applied to deep holes with drilling accuracy at IT8-IT9,drilling length/diameter <100, surface roughness Ra <3.2um.

There are 3 types of deep hole drills: BTA; Ejector; and Drilling head. Shown with B, P, D. B and P type drilling heads are commonly used.

B type Drilling Head (Single Tube)

B type Drilling Head List

Drilling Dia.

D2

D3

L1

F

6.0 – 6.59

4.6

4

15

6.6 – 7.29

5.1

4.5

15

7.3 – 7.79

5.6

5

15

7.8 – 8.59

6.1

5.5

20

8.6 – 9.49

6.6

6

20

9.5 – 10.49

7.1

6.4

20

10.5 – 11.49

7.6

6.8

20

11.5 – 12.5

8.1

7.2

20

12.51 – 13.5

9

7.5

23

13.51 – 14.5

11

10

23

14.51 – 15.5

12

11

23

15.51 – 16.5

12.5

10.5

22

16.51 – 17.5

13.5

11.5

23

17.51 – 18.4

14.5

12.5

24

18.41 – 20.0

15

13.5

30

20.01 – 21.8

16

14

26

21.81 – 24.1

18

16

27

24.11 – 26.4

19.5

17.5

27

26.41 – 28.7

21

19

27

28.71 – 31.0

23.5

21

30

31.01 – 33.3

25.5

23

30

33.31 – 36.2

28

25.5

30

36.21 – 39.6

30

27

37

39.61 – 43.0

33

30

37

43.01 – 47.0

36

33

37

47.01 – 51.7

39

36

37

51.71 – 56.2

43

39.5

41

56.21 – 65.99

47

43.5

41

66.0 – 72.99

58

53

77

73.0 – 79.99

63

58

77

80.0 – 86.99

69

64

100

87.0 – 100.0

76

71

100

P Type Drill (Double Tube)

P Type Drills List

Drill Diameter

D2

D3

L1

F

18.41 – 20.00

16

14

21.5

20.01 – 21.8

18

16

21.5

21.81 – 24.1

19.5

17.5

21.5

24.11 – 26.4


21

19

21.5

26.41 – 28.7


23.5

21

24.5

28.71 – 31.0


25.5

23

24.5

31.01 – 33.3

28

25.5

24.5

33.31 – 36.2


30

27

30.5

36.21 – 39.6

33

30

30.5

39.61 – 43.0

36

33

30.5

43.01 – 47.0

39

36

30.5

47.01 – 51.7


43

39.5

34.5

51.71 – 56.2


47

43.5

34.5

56.21 – 65.0


51

47.5

34.5

Drilling Rod

Coupling drilling rod for B Type Deep Hole Drill (one is required)

Drill Diameter

Drilling Rod (B Type)

D

d

18.41 – 20.00

17.0

11.5

20.01 – 21.8

18.0

12.0

21.81 – 24.1

20.0

13.0

24.11 – 26.4

22.0

14.0

26.41 – 28.7

24.0

15.5

28.71 – 31.0

26.0

17.0

31.01 – 33.3

28.0

18.5

33.31 – 36.2

30.0

20.0

36.21 – 39.6

33.0

23.0

39.61 – 43.0

36.0

25.5

43.01 – 47.0

39.0

28.0

47.01 – 51.7

43.0

31.0

51.71 – 56.2

47.0

35.0

56.21 – 64.5

51.0

36.0

64.51 – 65.5

56.0

39.0

65.51 – 72.8

62.0

45.0

72.81 – 79.8

68.0

48.0

79.81 – 86.8

75.0

55.0

6.81 – 101.6

82.0

60.0

101.61 – 111.6

94.0

72.0

111.61 – 125.0

106.0

82.0

P Type Deep Hole Drill Matching Connecting Rod (External and Internal Rod) length of connecting rod: guide supporting pocket, central supporting pocket’s width and length inside connecting parts plus component’s length should all be considered.

Coupling Drilling Rod for P Type Deep Hole Drills

External Drilling Rod

Internal Drilling Rod

Product List for B Type Drilling Rod

Drilling Range

External Drilling Rod (P Type)

Internal Drilling Rod (P Type)

D

d

D

d

18.41 – 20.00

18.0

12.0

10.0

9.0

20.01 – 21.8

19.5

14.0

12.0

11.0

21.81 – 24.1

21.5

15.0

13.0

12.0

24.11 – 26.4

23.5

16.0

14.0

13.0

26.41 – 28.7

26.0

18.0

16.0

14.0

28.71 – 31.0

28.0

20.0

18.0

16.0

31.01 – 33.3

30.5

22.0

20.0

18.0

33.31 – 36.2

33.0

24.0

22.0

20.0

36.21 – 39.6

35.5

26.0

24.0

22.0

39.61 – 43.0

39.0

29.0

27.0

25.0

43.01 – 47.0

42.5

32.0

30.0

28.0

47.01 – 51.7

46.5

35.0

32.0

30.0

51.71 – 56.2

51.0

39.0

36.0

34.0

56.21 – 65.0

55.5

43.0

40.0

38.0

P Type Deep Hole Drill Matching Connecting Rod (External and Internal Rod) length of connecting rod: guide supporting pocket, central supporting pocket’s width and length inside connecting parts plus component’s length should all be considered.

P type internal connecting rod length = external connecting rod’s length + a

a is up to connecting parts

Recommended Cutting Parameter for Deep Hole Drilling

Material

HB

Speed

Feed

12 – 25

25 – 43

43.1 – 65

65 – 85

> 85

Carbon Steel

125

50 -120

0.05 – 0.15

0.08 – 0.25

0.12 – 0.35

0.15 – 0.25

0.18 – 0.3

190

50 -120

0.05 – 0.15

0.08 – 0.25

0.12 – 0.35

0.15 – 0.25

0.18 – 0.3

250

50 -120

0.05 – 0.15

0.08 – 0.25

0.12 – 0.35

0.15 – 0.25

0.18 – 0.3

220

50 -120

0.05 – 0.15

0.08 – 0.25

0.12 – 0.35

0.15 – 0.25

0.18 – 0.3

300

50 -120

0.05 – 0.15

0.08 – 0.25

0.12 – 0.35

0.15 – 0.25

0.18 – 0.3

Low Carbon Alloy Steel

200

50 – 110

0.05 – 0.15

0.08 – 0.25

0.12 – 0.30

0.15 – 0.25

0.18 – 0.3

275

50 – 110

0.05 – 0.15

0.08 – 0.25

0.12 – 0.30

0.15 – 0.25

0.18 – 0.3

300

50 – 110

0.05 – 0.15

0.08 – 0.25

0.12 – 0.30

0.15 – 0.25

0.18 – 0.3

350

50 – 110

0.05 – 0.15

0.08 – 0.25

0.12 – 0.30

0.15 – 0.25

0.18 – 0.3

High Carbon Alloy Steel

200

50 – 120

0.05 – 0.15

0.08 – 0.25

0.12 – 0.30

0.15 – 0.25

0.18 – 0.3

325

50 – 120

0.05 – 0.15

0.08 – 0.25

0.12 – 0.30

0.15 – 0.25

0.18 – 0.3

Stainless Steel

200

40 – 110

0.05 – 0.15

0.08 – 0.25

0.12 – 0.35

0.15 – 0.25

0.18 – 0.3

240

40 – 110

0.05 – 0.15

0.08 – 0.25

0.12 – 0.35

0.15 – 0.25

0.18 – 0.3

Malleable Cast Iron

180

40 – 110

0.05 – 0.15

0.08 – 0.25

0.12 – 0.35

0.15 – 0.25

0.18 – 0.3

130

60 – 110

0.05 – 0.15

0.08 – 0.2

0.12 – 0.35

0.15 – 0.2

0.18 – 0.23

230

60 – 110

0.05 – 0.15

0.08 – 0.2

0.12 – 0.35

0.15 – 0.2

0.18 – 0.23

Gray Cast Iron

160

60 – 110

0.05 – 0.15

0.08 – 0.2

0.12 – 0.35

0.15 – 0.2

0.18 – 0.23

250

60 – 110

0.05 – 0.15

0.08 – 0.2

0.12 – 0.35

0.15 – 0.2

0.18 – 0.23

Nodular Cast Iron

180

50 – 110

0.05 – 0.15

0.08 – 0.2

0.12 – 0.35

0.15 – 0.2

0.18 – 0.23

260

50 – 110

0.05 – 0.15

0.08 – 0.2

0.12 – 0.35

0.15 – 0.2

0.18 – 0.23

Refined Aluminium Alloy

60

60 – 130

0.05 – 0.15

0.08 – 0.2

0.12 – 0.35

0.1 – 0.3

0.1 – 0.3

100

60 – 130

0.05 – 0.15

0.08 – 0.2

0.12 – 0.35

0.1 – 0.3

0.1 – 0.3

Cast Aluminium Alloy

75

60 – 130

0.05 – 0.15

0.08 – 0.2

0.12 – 0.28

0.1 – 0.3

0.1 – 0.3

90

60 – 130

0.05 – 0.15

0.08 – 0.2

0.12 – 0.28

0.1 – 0.3

0.1 – 0.3

130

60 – 130

0.05 – 0.15

0.08 – 0.2

0.12 – 0.28

0.1 – 0.3

0.1 – 0.3

Copper Alloy

110

60 – 130

0.05 – 0.15

0.08 – 0.2

0.12 – 0.28

0.1 – 0.3

0.1 – 0.3

90

60 – 130

0.05 – 0.15

0.08 – 0.2

0.12 – 0.28

0.1 – 0.3

0.1 – 0.3

100

60 – 130

0.05 – 0.15

0.08 – 0.2

0.12 – 0.28

0.1 – 0.3

0.1 – 0.3

200


20 – 65

0.05 – 0.15

0.08 – 0.18

0.12 – 0.28

0.1 – 0.3

0.1 – 0.3

Fe-based Alloy

280

20 – 65

0.05 – 0.15

0.08 – 0.18

0.12 – 0.28

0.15 – 0.25

0.1 – 0.3

Ni-based Alloy

250

20 – 65

0.05 – 0.15

0.08 – 0.18

0.12 – 0.28

0.15 – 0.25

0.1 – 0.3

350

20 – 65

0.05 – 0.15

0.08 – 0.18

0.12 – 0.28

0.15 – 0.25

0.1 – 0.3

Co-based Alloy

320

20 – 65

0.05 – 0.15

0.08 – 0.18

0.12 – 0.28

0.15 – 0.25

0.1 – 0.3

Titanium Alloy

30 – 60

0.05 – 0.15

0.08 – 0.18

0.12 – 0.28

0.15 – 0.25

0.1 – 0.3

Recommended Coolant Flow

Recommended Coolant Pressure

Cutting parameter is for reference only and should be adjusted based on actual cutting conditions

Line Number

Issue

Reason

Solution

1.

Too Short Chips

Incorrect cutting parameter

Ajust Speed and Feed

Incorrect chip breaker, fillet angle too small or too deep

Change chip breaker

Unstable component material

Adjust to appropriate speed and feed

Inappropriate initial cutting (component is not centered)

Adjust component with central height

2.

Too Long Chips

Incorrect cutting parameter

Adjust speed and feed

Incorrect chip breaker, fillet angle too small or too deep

Change chip breaker

3.

Unstable chips

Unstable component material

Adjust to appropriate speed and feed

Incorrect feeding device (for example use hydrolinder
as feeding device)

Consult equipment supplier or sales engineer

Not enough coolant resulting in chip congestion

Increase coolant

Component and tools are not rigid resulting in vibration

Consult equipment supplier or sales engineer

4.

Fibrous Chips

Unstable component material

Adjust to appropriate speed and feed

Incorrect feeding device (for example use hydrolinder
as feeding device)

Consult equipment supplier or sales engineer

Contaminated coolant

Clean the coolant

Chemical reaction between component and carbide
cutting tools

Check and change cutting tools grade

Cutting edge chips off

Change the drill

Low feed

Increase the feed

5.

Carbide cutting
edge chip off

Cutting tools are not sharp enough

Resharp and grind the cutting edge

Not enough coolant

Check flow and pressure

Contaminated coolant

Clean the coolant

Small guide bushing tolerance

Change smaller dia drill if necessary

Eccentricity between shank and spindle

Adjust eccentricity

Incorrect cutting edge parameter

Change cutting edge parameter

Unstable component material

Adjust to appropriate speed and feed

6.

Short cutting life

Inappropriate feed or speed

Adjust feed and speed

Inapproprate carbide grade or coating

Change grade according to materials

Not enough coolant

Check coolant temperature and coolant system

Incorrect coolant

Incorrect coolant

Eccentricity between shank and spindle

Adjust eccentricity

Incorrect cutting edge parameter

Change cutting edge parameter

Unstable component material

Adjust to appropriate speed and feed

7.

Rough surface

Eccentricity

Check and adjust

Chip breaker too big or lower than central height

Check correct chip breaker

Incorrect cutting tool or guide bar dimensions

Select correct cutting tools

Eccentricity between component and drills

Adjust eccentricity

Vibration

Consult equipment supplier or cutting tools engineer

Incorrect cutting edge parameter

Change cutting edge parameter

Low cutting speed

Provide cutting speed

Low feed while cutting carbide material

Increase feed

Unstable feed

Improve feed

8.

Eccentricity

Deviation between machine and component

Adjust

Too long drill rod or poor straightness

Adjust

Too long drill rod or poor straightness

Change cutting tools or parts

Component material (features, hardness, impurity)

Select correct cutting tools and cutting parameter

9.

Spiral holes

Chip off on peripheric inserts clamp

Change

Wear on guide pad resulting in less support

Change and adjust

Deviation between machine and component

Adjust

Less coolant and lubrication

Adjust coolant

10.

Too much cutting
vibration

Cutting tools are not sharp enough

Select correct cutting tools

Incorrect cutting parameter

Adjust cutting parameter

Machine is not rigid with less feed

Adjust machine or decrease drill diameter

Drill Dia.

d2

d3

d4

d5

d6

d7

L1

L2

L3

J

T

S

25 ~ 26.4

13

17.5

19

19.5

18

17.7

27

18.5

6

3

3

1.7

26.41 ~ 28.7

15

19

20.5

21

19.5

19.2

27

18.5

6

3

3

1.7

28.71 ~ 31.8

16

21

23

23.5

21.5

21.2

30

21.5

6

4

4

2.2

31.81 ~ 33.3

17.5

23

25

25.5

23.5

23.2

30

21.5

6

4

4

2.2

33.31 ~ 36.2

19

25.5

27.5

28

26

25.7

30

21.5

6

4

4

2.2

36.21 ~ 39.6

22

27

29.4

30

27.5

27.2

37

26.5

7

4

5

2.7

39.61 ~ 43

24.5

30

32.4

33

30.5

30.2

37

26.5

7

4

5

2.7

43.01 ~ 47

27

33

35.4

36

33.5

33.2

37

26.5

7

4

5

2.7

47.01 ~ 52.5

30

36

38.4

39

36.5

36.2

37

26.5

7

4

5

2.7

52.51 ~ 56.2

34

39.5

42.4

43

40

39.7

41

30.5

7

5

6

3.2

56.21 ~ 64.5

36

43.5

46.4

47

44

43.7

41

30.5

7

5

6

3.2

64.51 ~ 65.5

39

47

51.5

52

47.5

47

77

53


11.5

7

8

4.5

65.51 ~ 72.8

45

53

57.5

58

53.5

53

77

53


11.5

7

8

4.5

72.81 ~ 79.8

48

58

62.5

63

58.5

58

77

53


11.5

7

8

4.5

79.81 ~ 86.8

55

64

68.5

69

64.5

64

100

72

12

11

12

6.5

86.81 ~ 101.6

60

71

75.5

76

71.5

71

100

72

12

11

12

6.5

101.61 ~ 111.6

72

83

88

89

84

83.2

100

73

13

10

11

6

111.61 ~ 125

82

95

100

101

96

95.2

100

73

13

11

12

65

Customized threading for drill head is available according to client’s drawing and samples.

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