21. They had lots of rubber parts such as idlers and drive belts which would perish and wear out. 22. In 1935, the first tests for the production of rayon for tyres and driving belts were performed. 23. A timing belt is usually a toothed belt-- a drive belt with teeth on the inside surface. 24. Instead of a drive chain the 1125R uses a drive belt , which does not require lubrication or adjustment. 25. Furthermore, over time the drive belt can wear or lose mix generally prefer to use direct-drive turntables. 26. Power was transmitted to the rotors by a drive belt that linked both rotors and spun them in opposite directions. 27. It is a good idea to keep spare belts on hand, because a broken drive belt will cripple the blower. 28. The cooling fan and dynamo were built integrally with the one-piece crankshaft, removing the need for drive belts . 29. The manufacture of PowerGrip drive belts was relocated to the former Arrol-Johnston factory at Heathhall, Dumfries around 1970. 30. On some escalators the motion of the handrail is noticeably uneven, which could be due to the drive belt slipping.
