Gear machining by williams-eng.co.uk

023 8022 0897

Williams custom gears.

Custom spur gears

Custom spur gears are manufactured from standard cold rolled bar stock and custom cold rolled stock. These days customers can upload drawings to a gear cutters website and he performs the precision manufacture of Custom Spur Gears from cold rolled or standard bar stock.

CNC Machining

CNC Machining of custom gears becomes more difficult as strength increases. Many small and intricate lightly loaded parts such as screws, nuts and gears are machined from bar-stock of steel or other materials in high-speed automatic lathes. For strength, this material needs to have its machinability enhanced by additions such as sulphur (to form manganese sulphide in steel) or lead (in steel, aluminium alloy or brass). Although these additions tend to embrittle the material to which they are added, this disadvantage is tolerated because of enhanced productivity.

When machining is carried out on rolled stock, it is essential to preserve, as far as possible, the as-cast globular shape of the inclusions produced by 'free-cutting' additions through to the final product before cnc machining. This involves careful control of the rolling conditions: for example, steel containing Type I MnS inclusions for free-cutting is rolled at 1200°C, at which temperature the relative plasticity of the sulphide is low as compared to the matrix. The inclusions therefore elongate less during production of the stock and this minimizes the adverse effect on mechanical properties and maximizes the improvement in machinability. During cnc machining, deformation of inclusions will then take place in the compressive shear zone of the chip under temperature conditions where the relative plasticity of the inclusion is high. This reduces the ductility locally and gives pick-up on the tool surface, reducing friction.

Acedes Gear Tools

Williams & Co use Acedes Gear Tools as their preferred gear cutting tools, gear hobbing, milling cutters, gear shaving cutters and gear shaper cutters. They also manufacture plastic gears, in particular plastic spur gears.

Gear cutting UK

Gear cutting UK by Williams & Co (Southampton) Ltd Victoria Street, Northam, Southampton SO14 5QZ England  

email: d.fripp@williams-eng.co.uk  Tel : 023 8022 0897 Fax : 023 8063 8930

www.williams-eng.co.uk