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Bantam wormdrive pinion

power shaft not driving wormdrive pinion

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Nigel McBurney 1

30/12/2022 11:20:10

1101 forum posts
3 photos

I just wonder about the cause of the problem,the gear /sleeve might have been sintered steel,as a key integral with the gear may have been necessary as a keyway cut through the gear and sleeve and a separate key would have reduced the wall thickness and caused the gear to split, The short keyway milled in with key held in by socket screws seems a good solution, to retain the strength of the gear/bush. Around the time ie 1960s Villiers engines used sintered gears in their gear boxes particularly the final drive sleeve gear which would shed its teeth all too often.I doubt if a broach could have been used to to produce the bore and keyway as the bush wall is too thin. A broach would have cost less than a sinter tool but the whole bush and gear could have all produced in one hit by sintering,

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