What Should Be Noted When Installing Pulleys?

Pulleys are generally used for power transmission over long distances, so they have a wide range of applications, such as power output of small diesel engines, tractors and automobiles. They are also applied to mechanical transmission equipment including machining tools, textile machinery, lathes and forging presses. With such extensive applications, pulleys have distinctive features. The pulley drive offers overload protection, and the center distance between the two shafts in pulley transmission can be adjusted within a wide range. The following briefly introduces the precautions for pulley installation:

First of all, the pulley shall be cleaned before assembly to guarantee all pulley components are clean and dry. Ensure tight fitting of mating surfaces with no oil stains to maintain sufficient friction.

When the pulley is nearly seated, tighten two or three hex socket head cap screws in sequence to apply uniform axial force to the taper bushing, and ensure good coaxial positioning between the pulley and the taper bushing.

Third, after fastening the pulley, use a cable to inspect and adjust the relative positions of the driving pulley and driven pulley. Make certain that both pulleys lie on the same plane and the belt tension is appropriate.

Fourth, the pulley guard shall be intact and securely mounted to prevent severe safety accidents caused by belt breakage or pulley loosening during operation.

Fifth, the taper bushing is a wearing part. Its inner bore and keyway may get damaged after long-term operation. Inspect it every time the pulley is assembled. Replace spare parts promptly if any defects are found.

Pulley drives can reduce load impact, with smooth operation, low noise and slight vibration. They feature simple structure and convenient adjustment. In terms of manufacturing and mounting accuracy, pulley transmission has less stringent requirements compared with meshing transmission. Above are some characteristics of pulleys in service.