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Worms are like a screw thread and work with worm wheels or they can be used to gear with a single helical gear. A single helical gear is cheaper to make than a worm wheel but the resultant drive is not as good and it will not last as long in service.

Our maximum worm diameter is 250mm (10 inches) and maximum pitch 20MOD (1.25DP, 2.5 inches circular pitch).  We can also cut maximum 200mm (7.87 inches) diameter * 3m (118 inches) long. The maximum number of starts 20.

         
   
 

Hewitt & Topham Limited, Royd Way, Keighley, West Yorkshire BD21 3LG United Kingdom
Tel: +44 (0) 1535 602587  Fax : +44 (0) 1535 680587  Email: sales@hewitt-topham.co.uk

       
   

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