Description
External Thread Turning Insert – Whitworth Profile (12 TPI)
The 16 ER 12 W BMA is a precision-ground external thread turning insert tailored for generating 12 TPI Whitworth threads. These 55° thread profiles—conforming to BS 84 standards—are commonly used in pipe fittings, mechanical joints, and legacy British-standard components that require accurate and consistent thread geometry.
Manufactured from premium BMA-grade carbide, the insert provides exceptional wear resistance, thermal stability, and edge retention—ideal for both continuous and interrupted cuts in steel and similar materials. With a compact 16 mm length and 3/8" I.C., and geometry including X = 1.1 mm and Y = 1.5 mm, it ensures clean cutting action, excellent chip control, and dimensional reliability across production and repair applications.
Key Features:
- Ordering Code: 16 ER 12 W BMA
- Thread Type: Whitworth (BS 84 Standard)
- Profile: 55° included angle with rounded root and crest
- Insert Type: External
- Hand: Right Hand
- L: 16 mm
- I.C.: 3/8"
- Pitch (TPI): 12
- X: 1.1 mm
- Y: 1.5 mm
- Carbide Grade: BMA
- Applications: External threading for BS Whitworth-standard pipe fittings, fasteners, and mechanical assemblies
- Key Advantage: High-performance BMA-grade carbide for long-lasting, accurate Whitworth threads in demanding machining environments
Carmex Precision Tools Ltd. is known worldwide for its high-precision threading solutions. Their Whitworth inserts provide dependable threading for legacy British profiles, ensuring compatibility and durability across industries.
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