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Described is a process for mounting rollers on shafts. The process eliminates hub metal, setscrews, diameter expansion, and bonding.
English (United States)
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Simplified Roller Assembly Attachment
Described is a process for mounting rollers on shafts. The process eliminates
hub metal, setscrews, diameter expansion, and bonding.
Shaft-mounted rollers such as those used for paper transport must be
attached to the shaft in such a manner as to prevent slippage between the roller
and the shaft. This is sometimes done by mounting the roller itself to a hub or
flange which provides a sliding fit to the shaft. A setscrew or taper pin can then
be used to fasten the hub to the shaft.
Other approaches have included bonding the roller to the shaft or expanding
the shaft diameter (as by knurling) to provide a tight fit.
It has been found that a shaft holding polyurethane rollers with an inside
diameter smaller than the shaft can be assembled easily by providing tapered
slots on the shaft. The difference between the shaft diameter and the rollers'
inside diameter varies according to the torque required.
The rollers are forced onto the shaft from one end and can be pressed past
the preceding slots until positioned at the proper slot.