Page 184 - Threading_Handbook

3.5.4 Indexable Inserts for Thread Milling
THREAD MILLING Indexable inserts for thread milling are available for production of internal and external,

and right and left-hand full profile threads in most popular standards. These inserts have a
deflector that provides excellent chip control and ground profiles to achieve high accuracy
and surface quality. The thread milling inserts are made from grade IC908, which is a PVD
TiAlN coated tough grade. They are suitable for milling stainless steel, high temperature
alloys and other alloy steels. ISCAR offers three types of indexable thread milling inserts:

• MT LNHT – single-sided indexable thread milling inserts

• MT LNHU – double-sided indexable thread milling inserts
• MTH – helical indexable thread milling inserts. These inserts may also be used for high
shoulder finish milling applications or for machining various specially tailored profiles

ISCAR can also provide special profile inserts on request

Basic Dimensions of Thread Milling Inserts:
TP
TP TP
W1
INSL
W1 W1

S1
INSL S1 INSL S1
MTH MT LNHU MT LNHT

W1 — Insert width
TP — Thread pitch

INSL — Insert length
S1 — Insert thickness

184 ISCAR