Owner's manual

( ()()

60° 7.6° 5°

55° 7.1° 4.7°

30° 4° 2.6°

29° 3.8° 2.5°

10° / 3° 2.7° / 0.8° 1.8° / 0.5°

. Applications – Thread turnin

Relationship between  ank clearance, radial clearance and

thread pro le angle

The smaller the thread pro le and radial clearance angles, the

smaller the  ank clearance angle (see table below for  ank clear-

ance values when the correct shim, equal to the helix angle, is

used).

Please note that as the pro le angle becomes smaller, it is more

important to choose the correct shim.

Threads with small pro le angles

ACME, Stub ACME, trapezoidal and rounded threads fall into this

category and put extra pressure on the cutting edge. To minimize

this pressure, choose the correct shim to tilt the insert.

Thread

Pro le

Angle Internal 15° External 10°

Flank clearance Flank clearance

Metric, UN

Whitworth

Trapezoidal

ACME

Buttress

Radial

clearance ()

Flank

clearance