Author Topic: Main shaft nut tension  (Read 431 times)

Offline oval57

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Main shaft nut tension
« on: 10.11. 2016 20:10 »
I have some end float in my gearbox (52 plunger A10) main shaft. How much is acceptable and is there a recommended tension for the nut.. Being the nut located inside the gearbox outer case. Thanks
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Started with a basket case, now got 3 BSAs and a shed full of bits.....mmmm feel another BSA coming on...whoops two more followed me home...

Online chaterlea25

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Re: Main shaft nut tension
« Reply #1 on: 10.11. 2016 21:43 »
Hi Oval
The bearing on the RHS of the gearbox should hold the mainshaft in position = zero endfloat
The nut on the kickstart ratchet should lock it all together
Do not over tighten the nut as it will distort the ratchet bush and jam it !!
a guess would be 20ft/lbs

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1961 Super Rocket
1963 RGS (ongoing)