Whitworth Insert | Threading Tool Supplier | Cutwel Ltd
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Tooling Supplier

for the UK & Ireland

Monday-Thursday 8am-6pm
& Friday 8am-5.30pm
Cutwel is still open for business! We have taken the necessary precautions following government advice, including extra protection for our warehouse staff who are working hard on site to dispatch all orders as normal. The majority of our office staff are now working from home but available to take your calls and emails for orders/enquires.


Whitworth (BSW/BSP) Threading Inserts

Single Point Thread Turning Inserts for BSW, BSF & BSP 55 Degree Threads

Our range of Whitworth threading inserts can machine full form BSW, BSF & BSP 55 degree threads. Korloy single point threading inserts for lathe screw cutting are compatible with all major threading tool holders (with the exception of Sandvik).  Whitworth threads can also be machined with 55 degree partial profile threading inserts which do not top the thread off.

Korloy threading inserts are stocked as standard in grade PC3030T, suitable for general machining on steel, stainless and cast iron.  We can also offer Vardex threading inserts from Vargus for more demanding applications (e.g. performance threading of stainless steel, titanium or aluminium).   

Size guide

  • 11ER/NR = Vardex 2ER/IR
  • 16ER/NR = Vardex 3ER/IR
  • 22ER/NR = Vardex 4ER/IR
  • 27ER/NR = Vardex 5ER/IR

Buy online today for next day free delivery and performance guaranteed!