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Head sheave and deflector sheave
Head sheave and deflector sheave are mainly in two structures: one is spoke-type structure, the other is welded-type structure. The former is traditional structure, with poor overall rigidity, easily broken of spoke during operation. The pad of rope groove uses hardwood materials, easily abraded and frequently replaced, with noise during operation. Inner diameter of traveling sheave is lined with bearing bush, and rotating fitting surface is lubricated using lubricating grease in grease cup, which will turn metamorphic and dry after certain time in service, and the grease-discharging pipe will be clogged; it will hamper the refilling of grease for lubrication. The bearing bush is cast iron material, easily abraded and fractured, which requires great workload of maintenance.
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