Friction Welding Machine Can process round and hexagonal bars, carbon steel or alloy steel, with diameters ranging from 12-35mm. Material length is unlimited. Coaxiality tolerance is 0.3mm, and post-weld wear tolerance is ±0.7mm. Products that can be processed include: engine valves, ball studs, universal joint cages, steering rods, V-type thrust rods, fender supports, automotive axles, shock absorbers, turbocharger shafts, S-shaped camshafts, multi-gear shafts, etc