Description
Machine tap for tapered Whitworth pipe threads.
Application
For BSPT tapered pipe threads.
Features
Short stable shank.
Tapered thread profile.
Advantages
Suitable for manufacture or cleaning of existing threads.
Product Data
Product type: Machine Tap For Tapered Whitworth Pipe Thread
Article family: 138120
Thread size: 1/2-14
Thread form: Rc taper 1:16
Tolerance: ISO 7/1 / BS21
Tool material: HSS-E
Coating / surface: Uncoated
Dimensions
Overall length L: 80 mm
Shank diameter Ds: 16 mm
Square: 12 mm
Recommended tapping-hole diameter: 17.8 mm
Tapping hole B: 17.7 mm
Gauge diameter: 18.61 mm
Minimum depth: 22.3 mm
Cutting Data
Steel <500 N/mm²: 9 m/min
Steel <750 N/mm²: 9 m/min
INOX: 5 m/min
Copper alloys: 9 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
Hardened steel: H
INOX: M
Titanium: S
Cast iron: K
Copper alloys: N
Graphite / GRP / CRP: N
Notes
Pre-drill plain hole or ream 1:16 for best process reliability.