Description
General-purpose blind-hole tap for G threads.
Application
For Whitworth parallel pipe threads DIN ISO 228/1.
Features
Optimised neck and flute length.
Vapourised surface.
Advantages
Improved chip evacuation on deep threads.
Product Data
Product type: GARANT Vap Tap Blind-Hole Machine Tap G Thread
Article family: 137755
Thread size: G1/2
Threads per inch: 14
Thread diameter: 20.96 mm
Thread form: Form C
Tolerance: ISO 2 6H
Tool material: HSS-E
Coating / surface: Vapourised
Dimensions
Overall length L: 125 mm
Shank diameter Ds: 16 mm
Square: 12 mm
Recommended tapping-hole diameter: 19 mm
Cutting Data
Aluminium: 18 m/min
Steel <500 N/mm²: 18 m/min
Steel <750 N/mm²: 15 m/min
Steel <900 N/mm²: 15 m/min
INOX <900 N/mm²: 6 m/min
Copper alloys: 15 m/min
ISO Code
Aluminium and plastics: N
Aluminium: N
Aluminium cast >10% Si: N
Steel <500 N/mm²: P
Steel <750 N/mm²: P
Steel <900 N/mm²: P
Steel <1100 N/mm²: P
Steel <1400 N/mm²: P
Steel <55 HRC: H
Steel <60 HRC: H
Steel <65 HRC: H
Steel <67 HRC: H
Steel <70 HRC: H
INOX <900 N/mm²: M
INOX >900 N/mm²: M
Titanium >850 N/mm²: S
Cast iron GG/GGG: K
Copper alloys: N
Graphite / GRP / CRP: N
Notes
137765 is intended for components galvanised or shrinking after hardening; tapping hole should be drilled 0.05 mm larger.