Thread Helix Angle and Anvil Selection

Pitch TPI mm 2.5 10

Use AE Anvils for EX-RH

Special Holder Required ACME STUB ACME

9 and IN-LH Toolholders.

trapez (din 103)

38AE or Al+4.5º Use Al Anvils for IN-RH
round (din 405)
and EX-LH Toolholders.
3.57AE or Al+3.5º
46AE or Al+2.5º
55λ°
Standard Anvil (supplied with toolholder)
64
3.5α°
831.5°
102.5
122AE or Al+0.5º
161.5Toolholder

5 10 20 30 40 50 60 70 80 mm

Diameter

Pitch TPI mm 2.5 10

Special Holder Required Partial Profiles 60º Partial

9 Profiles 55º ISO, UN,

38WHIT., NPT, BSPT AE or Al+4.5º Use AE Anvils for EX-RH
3.57AE or Al+3.5º and IN-LH Toolholders.
Use Al Anvils for IN-RH
46AE or Al+2.5º
and EX-LH Toolholders.
55
64
3.5Standard Anvil (supplied with toolholder)
83
102.5
122
161.5
51020304050607080mm
Diameter
Pitch
TPImm

2.5 10 Use AE Anvils for EX-RH

Special Holder RequiredAmerican Buttressand IN-LH Toolholders.
9
SagengewindeUse Al Anvils for IN-RH
38(DIN-513) AE or Al+2.5º
and EX-LH Toolholders.
3.57
46Standard Anvil (supplied with toolholder)
Replacing the
55=3.74
α° standard anvil
64with a negative
3.5Change to Negative Anvil AE or Al-1.5ºangle anvil
83
γ=1.5°will eliminate
102.5
122side rubbing
161.5Toolholder

5 10 20 30 40 50 60 70 80 mm

Diameter