Modern Machine Shop

NOV 2018

Modern Machine Shop is focused on all aspects of metalworking technology - Providing the new product technologies; process solutions; supplier listings; business management; networking; and event information that companies need to be competitive.

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Page 65 of 155

MMS NOVEMBER 2018 64 SURFACE TREATMENT Stream Finishing Confines Friction to the Racetrack To improve component finish as well as engine and gearbox performance for its customers, this racing motorcycle rebuild company based in the UK has gears and other components treated with a super-finishing process common to jewelry and aerospace applications. Every motorcycle race team and rider contin- uously works to improve engine performance. Kieran Sangha, owner of Sangha Race and Restoration in Leicester, UK, builds high-horse- power race-bike engines and knows that simply refurbishing and renewing parts rarely give big performance gains. "Friction between com- ponents is an engine and gear killer," says Mr. Sangha, who, when not transforming motorcycles for racing customers, enjoys the thrill of com- petition himself. The contact surfaces are under constant stress from powering through the gears while maintaining maximum revs of 18,000 rpm, he says. This causes heat and really dulls perfor- mance. It may even lead to component failure and not finishing the race. Worse yet, a mechanical fault could lead to injury. Mr. Sangha previously tried to mitigate these problems by vibratory-finishing gears, shafts and engine parts. The process improved component surface finish to a degree, but they still had a roughness that was noticeably uneven across the surface. Also, chemicals used with the media in the vibratory machines could weaken the metal BARBARA SCHULZ | EUROPEAN CORRESPONDENT Kieran Sangha, owner of Sangha Race and Restoration in the UK, knows that increasing engine performance is the ultimate goal of every race team and rider.

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