Precision Manufacturing Company based in Sheffield Specialising in Wire Erosion / Optical Grinding / Grinding / Turning / Milling / Braising

Products

Wire Erosion

Over the past decade 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, PCD and high precision press parts commonly working to 0.005mm.

ISO and non-standard insert production.

Our standard tolerance on wire erosion is ±0.005mm. We offer large submerged wire erosion with 6 axis machining installed in 2001 with a brand new machine in 2017. Specialising in tool steels, carbide and PCD the effective surface area is degraded very little, giving an excellent surface finish and high accuracy. CAD/CAM programming enables us to program more complex tools.

Poly crystalline diamond can be cut to size and shaped for work rests and cutting tools.

Grinding

We have the capacity to grind internal and external to 0.002mm on a range of steel and carbide. With a cylindrical capacity of 600mm diameter and a flat capacity of 1000mm. 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.

Optical Grinding

We have 2 full CNC optical grinders with up to 50x magnification and a tolerance range of +/-0.002mm. These are the only 2 of their kind in the UK and bespoke work can be carried out on them, cylindrical and square.

Complex forms to high tolerances are regularly machined and variety of different tooling can be produced on them in steel and tungsten carbide with a surface finish of 0.2Ra.

Turning

We have at our disposal a wide range of manual and CNC controlled milling and turning machine tools, including Spinner, Deckel, DMG Mori and Hitachi Seiki.

The range of sizes we can achieve in turning are anything up to 1 metre in diameter x 1.5m in length. Our latest lathes include live tooling, Y-axis and sub spindle to allow faster and more efficient machining. 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.

Milling

We offer milling up to 1500mm x 610mm x 500mm. Our newest machine has 3 + 2 machining and a 12000rpm spindle speed. This allows machining of materials up to 65Rc to a tolerance of +/-0.010mm on hardened tools and +/-0.005 on soft components.

We also have the latest Autodesk CAD/CAM system installed to allow us to work to customers models as well as drawings.

Brazing

We have full brazing and welding facilities to allow us to put materials with high wear properties onto steel bodies and reduce the cost of the finished tool.

We can fix natural industrial diamond to a variety of complex probe shapes for in process measurement of components as well as PCD that can be formed.

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 dispatch, either to the customer or for one of a variety of special coatings we can applu; e.g. TiN, TiCN and Futurer.

Polishing of components to 0.1Ra is also available.

Using our talysurf form measurer we can provide reports on form tools showing the sizes and tolerances of the final product.

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

Target market

Looking to expand into domestic and international markets in the the bearing manufacturing OEM and aftersales, automotive, marine