Wrentham Tool Group offers select specialty services including but not limited to Gage Calibration, Coating, EDM, Heat Treating/Annealing, Surface/OD Grinding, Polishing, and Laser Etching. WTG has 600+ years of combined experience and is the longest operating punch manufacturer in the world. Wrentham’s customer service representatives are knowledgeable, pleasant, and always prepared to assist a customer with their needs with due diligence and as quickly and effectively as possible.

Gaging and Calibration

Wrentham Tool can inspect and certify your Penetration Gages, Plug Gages, Ring Gages, and Test Blocks. We certify to all major fastener standards.

WTG Coatings

Wrentham (WTG) hard coatings are very thin but harder than steel and chemically inert. They significantly reduce punch wear, cold welding and friction. More and more companies are adding WTG Coatings to their punches and forming tools to boost productivity and quality.

Lower costs result due to less tool wear, fewer punch failures and predictable punch changes. As a result, manufacturing costs are reduced.

Longer punch life reduces machine down time which in turn reduces product manufacturing costs. WTG coated punches also generate a higher quality fastener due to smoother surfaces and better dimensional stability from piece to piece. It is not uncommon for WTG coated punches to last 3 to 5 and even 10 times longer than uncoated plain punches.

With WTG Coated punches you can:

  • significantly boost productivity
  • reduce manufacturing costs
  • improve manufacturing reliability
  • enhance product quality
  • shorten delivery times
  • reduce energy and lubricant requirements.
  • Please consider specifying WTG Coatings on your next order.

Heat Treating

At the Wrentham Tool Group, we have identified Heat Treat as a “SPECIAL PROCESS” and as such the operation is performed in-house. This approach allows for strict control of the process to ensure that the customer receives the highest quality punches and pins that can be manufactured.

Our heat treat processes for hardening, quench and tempering are performed in Vacuum. These operations are critical for the heat treatment of high-speed steel. The operations are performed by experienced operators that utilize recipes that have been proven throughout the years to provide superior toughness and wear resistance.