NUMBER OF THREADING PASSES SELECTION INTERNAL THREAD

FOR SINGLE POINTS INSERTS

RIGHT THREAD LEFT THREAD

PITCH mm TPI0.5 480.8 32 1.0 241.25 20 1.5 161.75 142.0 122.5 103.0 84.0 6 6.0 4If you want to turn an IN-LH Thread but you prefer to pull the metal chips while thread turning outwards, you should use an IN-LH insert & toolholder
NUMBER OF PASSES3-64-7 4-96-10 5-11 9-126-137-158-1710-20 11-22IN-LH Toolholder & InsertIN-LH Toolholder & Insert
NOTESChange to negative anvilChange to negative anvil
. For most s . The tough select. . General rutandard er work le of thuapplications t piece material, mb: fewer pashe middle of the higher t ses are bettthe range he numbe er than mis a go r of cutti ore speeod sta ng pas d.rting poi ses yount. shouldIN-RH Toolholder & InsertIN-RH Toolholder & Insert
Change to negative anvilChange to negative anvil

Screw Nut

THREAD TURNING METHODS THREADING INSERTS

EXTERNAL THREAD

P/8 P/4

P/8 P/4 Internal - 15°

H h 15° 10°

H h 15° 10° External - 10°

RIGHT THREADLEFT THREADP/8P/4ScrewNut
ScrewNut

H h 1. In most thread forms 15°10° 2. The insert relief angle of a 3. Our built-in relief angles

Change toEX-LHEX-LHinternal and externalstandard Lamina externalensure automatic insert
ToolholderToolholderNut Screw
Negativethreads have differenttoolholder is 10°; for anflank angle clearance.
Anvil& Insert (1)& Insert (1)
depth and radius, thus toolsinternal toolholder it is 15°.
are not interchangeableThis 5° difference is
(2)to provide additional
(2)necessary radial clearance.

Internal - 15° Change to Negative Internal - 15° Anvil

External - 10° (1) External - 10° Internal - 15° (1) EX-RH External - 10°

ToolholderIf you want to turn anEX-RH
& Insert (2)EX-LH Thread and you Toolholder
only have EX-RH& Insert (2)1. Profiles of Lamina internal & external threading inserts are2. Insert and toolholder should
Insert & Toolholder
precisely ground to ensure accurate thread geometry whenalways match. An IN-RH
used in their corresponding toolholders.insert must be used with an
Using internal inserts with an external holder will result inIN-RH toolholder.
distortion of angle and insert geometry.No mismatch is allowed.