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Offset crank engine camshafts

Camshafts that are available for offset crank BSA, Norton and Triumph twins. Manufacturers include Megacycle, Newman and SRM (BSA Only). Welded Norton and BSA cams can be made by Ed G Cranks assuming that donor cam is not worn.

When ordering a cam from any supplier send a message to offsetcrank@yahoo.com for drawings. Delivery from any of the suppliers listed above is slow; expect to pay 100% of the cost up-front then keep bugging them until you get the finished product. Since these are custom cams, all camshaft suppliers except SRM must make them as special orders. We may be able to sell a cam and crank together in some cases but can't estimate the cost of the camshaft due to exchange rate flucuations and supplier production schedules. Ed G Cranks is currently working with a cam grinder to replicate stock grind grinds using donor camshafts (July 1, 2009) but profiles are limited to stock grinds

Norton cam made by Newman Cams. This cam is made from all new material that has been nitrided. Newman Cams can make a cam to any profile that you specify. Ken Newman may be contacted at ken@newman-cams.com for more information. Of note; this is the only cam supplier that I have dealt with that gives you a delivery date and is close to meeting it!

Norton cam made by Johnson Cams. This cam is made from donor cam with welded and reground lobes as Johnson cannot machine the tach drive gear on his cams. All journals and lobes have been polished.

Set of Triumph camshafts made by Newman Cams. Similar to their Norton cams, these are new material with nitrided finish.

BSA A10 and Norton camshafts made by Ed G cranks before nitriding. These cams are made from donor cams with lobes moved by 45 degrees on drive side. Drill rod is welded inside cam for extra strength. Finished cam will have polished lobes and journals along with checking alignment. The latest cam building process involves welding new lobes and regrinding similar to the Johnson process (July 1, 2009).

Norton fixture used for welding or nitriding camshafts. Made from cast 4140 steel, or Class 45 cast iron, these fixtures keep camshaft journals aligned during welding and heat treating processes. New material can be heat-treated without fixtures but welded material must be stablized and stress relieved to prevent warping before they are heat treated.