Page 277 - THREADING CATALOG

USER GUIDE

Indexable Inserts for Thread Milling

Indexable inserts for thread milling are available for MT LNHT and MT LNHU –
production of internal and external, and right and Designation Code Key:
left-hand full profile threads in most popular standards. THREAD MILLING
These inserts have a deflector that provides excellent MT LNHU 21 04 I 1.5 ISO IC908
chip control and ground profiles to achieve high accuracy 1 2 3 4 5 6 7
and surface quality. The thread milling inserts are made MT – MILLTHREAD family
from grade IC908, which is a PVD TiAlN coated tough
grade. They are suitable for milling stainless steel, 1 Number of Cutting Edges
high temperature alloys and other alloy steels. ISCAR
offers three types of indexable thread milling inserts: LNHT — single-sided
• MT LNHT – single-sided indexable thread milling inserts. LNHU — double-sided
• MT LNHU – double-sided indexable thread milling inserts. 2 Insert Length (INSL)
• MTH – helical indexable thread milling inserts.
MTH-F inserts may also be used for high
shoulder finish milling applications or for
machining various specially tailored profiles.
ISCAR can also provide special INSL
profile inserts on request.
3 Insert Thickness (S1)
Basic Dimensions of Thread Milling Inserts:
TP TP

W1
INSL W1 S1

4 Thread Gender
INSL S1
MTH S1 MT LNHU I — internal thread
E — external thread
TP
5 Pitch Value by Number:
1.0 – 6.0 mm
W1
4 - 32 TPI
INSL S1 6 Thread Standard
MT LNHT
ISO — ISO metric
W1 — insert width UN — american UN
TP — thread pitch W — whitworth
INSL — insert length BSPT — BSPT
S1 — insert thickness NPT — national pipe thread
NPTF — national pipe taper fuel
7 Grade
IC908

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