Microbore Tooling Systems

Fine Boring Systems & Deep Hole Drilling

MICROBORE unit RANGE

FIND OUT EVERYTHING YOU NEED TO KNOW ABOUT MICROBORE'S unit RANGE 

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Microbore adjustable threaded cartridges

for precision boring, turning and facing operations

adjustable threaded cartridges - diagram 1

Microbore Tooling Systems Approach

A cutting tool system must have a broad range of sizes and tool shapes to choose from so that the correct tool can be selected for a specific application. Microbore® offers more cartridges, in more sizes, in more shapes and in more carbide grades than any other manufacturer of adjustable cutting tools.

Rigidity and Speed of Adjustment

Microbore® cartridge units are axially locked into a 360° cone seat that provides metal-to-metal support. It gives maximum rigidity to the cutting edge of the tool that is necessary to obtain high accuracy, high stock removal and longer tool life.

adjustable threaded cartridges - diagram 2

Microbore units are available in six basic sizes: 1, 2, 3, 5, 7, and 10. Each size is available in a variety of styles with either indexable inserts or brazed carbide cutting edges.

MICROBORE unit identification codes

Microbore cartridges are stamped with a combination of letters and figures which identify the size and length of the cartridge, tool style and the grade of carbide (Brazed) or size of insert.

Most standard units are available in both right and left hand cutting. For standard left hand units, prefix the order code with ‘LH’. For the left hand headed up units replace the letter ‘B’ with ‘T’.

standard indexable units

adjustable threaded cartridges - diagram 3

headed indexable units

adjustable threaded cartridges - diagram 4

standard brazed units

adjustable threaded cartridges - diagram 5

Standard Microbore cartridges in a wide range of sizes are available in a comprehensive range of tool shapes. Microbore cartridges come with zero top rake; however cartridges having 12° top rake are available for machining aluminium and other light alloys. Microbore cartridges having non-standard dimensions, carbide grades, and tool point radiuds, are designed and manufactured to suit customer requirements.

CARBIDE GRADES FOR BRAZED UNITS

K05-20

F

Fine boring of Cast Iron and Non-Ferrous materials

K05-20

12F

To suit Aluminium and Magnesium alloys

P05-20

E

Fine boring of Steel

P05-20

12E

General machining of Steels at medium speeds

Other grades of carbide are available on request.

MICROBORE unit SPARES Identification SHEET

STANDARD UNIT

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HEADED UNIT

adjustable threaded cartridges - diagram 7

PIN LOCK UNIT

adjustable threaded cartridges - diagram 8

GEAR ADJUST UNIT

All units are supplied complete as shown including an insert key, but less inserts.

Replacement cartridges are supplied with insert screw, but less inserts.

To improve rigidity when cut depth exceeds 0.5mm, it is recommended that the top adjustment springs be removed. See Standard Boring Bar Range catalogue page 21 for setting information.

variations of available microbore units

These semi standard units are obtainable on short delivery. Please enquire about availability before placing an order.

We will design and manufacture individual units to the customers own specification if required.

recommended cutting conditions for sumitomo electric insert grades

adjustable threaded cartridges - diagram 11
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