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Oil Leak on Colchester Bantam

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David Francis 327/10/2020 11:25:34
2 forum posts

Have a Colchester Bantam 1600

It leaks oil from the headshaft behine th chuck when run at fairly fast speeds.

Not sure if it needs oil seal replacement and what sort of job it would be.

Any info would be appreciated

Emgee27/10/2020 12:48:05
1763 forum posts
237 photos

Hi David

You don't say if you have the manual but if not I suggest you join the Colchester iO Group where there is lots of info including the Manual FOC.



Dave Wootton27/10/2020 22:32:32
83 forum posts
8 photos

Hi David

I've got a Bantam 2000 which used to do the same when run fast or for very long periods, Following a posting by Gray Meek about his mill gearbox leaking caused by it pressurising itself as the oil warms. I carried out the same experiment as outlined in his post, namely putting the finger cut from a nitrile glove over the filler with the plug removed, and it did inflate before it popped off, so I drilled a 4mm hole in the headstock filler plug and it has not done it since.

According to the manual for mine there are only labyrinth seals on the spindle, not garter type seals.


David Francis 328/10/2020 06:20:12
2 forum posts

Hi Dave

Thanks for the quick reply, I will give your suggestion a try.

Many Thanks

David Francis

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