Our Services

Wire erosion

Over the past few years Pen has developed a reputation for the quality of its products and this now includes wire erosion and EDM Erosion.

We can offer full CNC machining on both operations and a size range of 800mm square by 350mm high.

We cover a range of materials but specialise in carbide and high precision press parts commonly working to 0.005mm.

ISO and non standard insert production.

Our standard tolerance on wire erosion is ±005m/m. We offer the largest sub-contract submerged wire erosion available with 6 axis machining installed in 2001. Specialising in tool steels and carbide the effective surface area is degraded very little, giving an excellent surface finish and high acuracy.


We have the capacity to grind internal and external to 0.002mm on a range of steel and carbide.
With a capacity of 600mm diameter and a flat capacity of 1000mm we offer a broad range. The introduction of rotary grinding up to 700mm has added to our range.

Form tools both flat and cylindrical are available produced to 0.005mm as a regular tolerance.

Also form grinding of crush rolls and drawing rolls by either Diaform or full CNC profile grinding on steel or Tungsten Carbide is available.

We have equipped all areas of our production with both the machinery and skill levels to produce high tolerance work to customer specifications in a very wide range of materials.

A glance at our production facility shows the expertise on offer.

We have developed alongside the Bearing industry a capability to form shapes on carbide / cermet and ceramic inserts to close limits for turning applications and, as with all our products, a range of coatings are available.

Our efficiency in producing these inserts has come with the CNC creep feed grinding machines designed and built by Pen Tools giving from stock blanks a turn-around to our customers of only a few days, thus allowing major stock reductions at our customers.

Hard turning & Milling

We have at our disposal a wide range of manual and CNC controlled milling and turning machine tools, including BRIDGEPORTDECKALMAHO and HITACHI SEIKI.

The range of sizes we can achieve in turning are anything up to 1 metre in diameter.

We also have the facility on the milling side of the factory to manufacture parts up to 1 metre in length and width.

With research from ourselves and the cutting tool suppliers, we are able to remove material in both milling and turning up to 65 Rockwell still holding close tolerances of ± 0.010 m/m.

Final inspection & Finishing

All the components that we undertake for manufacturing are inspected and checked at every stage of manufacture - which gives a 100% inspection during machining, the component(s) then go into the temperature controlled inspection department for a final inspection prior to packing or despatch, either to the customer or for one of a variety of special coatings we use; e.g. TIN, TICN and Futurer.

We as a company try to take every possible step needed to keep our quality standards at the highest level.

Home   |   About Us   |   History   |   Our Services   |  Introduction   |   Grinding   |   Inspection   |   Milling   |   Turning   |   Wire Erosion

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