Page 213 - Threading_Handbook

Application
Machining Diameter • What is the machining diameter?

The tables below define the range of cutter diameters available, according to the requested
thread profile / standard and pitch / TPI. THREAD MILLING
Based on Chapter 3.11, ISCAR’s recommendations for cutter diameter selection are as
follows:

• For internal thread milling, in most cases the initial endmill diameter is recommended to be
up to 70% of the thread major diameter.
• For external thread milling, in most cases the initial endmill diameter can be over 70% of the
thread major diameter.

Cutter Diameters - Partial Profile - 60° - Solution for Internal and External Threading
Thread Milling Pitch (mm)
Family Subfamily 0.25 0.30 0.35 0.40 0.45 0.50 0.60 0.70 0.75 0.80 1.00 1.25
Ø1.9 - Ø3.2 - Ø8.0 -
SOLIDTHREAD MTECI Ø1.9 Ø3.2 - Ø8.0
Ø4.0 Ø4.0 Ø12.0
MULTI-MASTER MM TRD Ø15.7
T-SLOT SD TRD
Cutter Diameters - Partial Profile - 60° - Solution for Internal and External Threading
Thread Milling Pitch (mm)
Family Subfamily 1.50 1.75 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.00 8.00
SOLIDTHREAD MTECI Ø8.0 - Ø12.0 Ø12.0 - Ø16.0
MULTI-MASTER MM TRD Ø15.7 Ø21.7
T-SLOT SD TRD Ø32 Ø40

Cutter Diameters - Partial Profile - 55° - Solution for Internal and External Threading
Thread Milling TPI
Family Subfamily 14 11 6 4 3
MULTI-MASTER MM TRD Ø21.7
T-SLOT SD TRD Ø32 Ø40
Cutter Diameters - Full Profile - Solution with Indexable Inserts
Thread Milling Cutter Diameter (mm)
Family Subfamily min. max.
MTE Ø9.5 Ø48
MTF Ø63 Ø100
MILLTHREAD MTFL Ø20 Ø45
MTSRH endmill Ø23 Ø45
MTSRH shell mill Ø32 Ø63

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