What is the thread size for the drum retaining screw

[robertjohnwood]

Does anyone know the thread size of the brake drum retaining screw on a 2a.

 

[mrchurchill109]

IIRC 5/16-18...but I may be wrong. I know they're a common hardware store size (here at least) but the heads are thinner than new ones.

ajr

 

[Blackburn]

Should be 3/8" whitworth originals heads where machined , hardware store equivalent heads are cast hence thicker.
I wonder if these would have the right depth of head
http://www.ebay.co.uk/itm/3-8-WHITW...rial_Nails_Fixing_MJ&var=&hash=item20d4fcf632

 

[dominicbeesley]

I bought a bag full from t'internet

Some do stick out a bit but IIRC the standard wheels don't touch the drum face at that point.

 

[robertjohnwood]

Thanks for the replies. The threads in the hub are knackered and I cannot get the screw right into the drum. You can see where the wheel is coming up against it. ( Wellers)
Another problem I had was after adjusting the brakes when I replaced the wheel and tightened it I could not move the wheel. Any thoughts on this? I have slackened the brakes off till I could turn the wheel.

 

[edd s2]

Why bother with the screw? It is only there to hold the drum on during build before the wheel is put on. The wheel clamps the whole lot together. I never use them as all they do is cause issues when trying to take drum off next time.

As for wheel not turning sounds like just needed to adjust once it was all clamped together. Or if t was a rear did you have the band brake on after tightening?

 

[Rattlegun]

Thanks for the replies. The threads in the hub are knackered and I cannot get the screw right into the drum. You can see where the wheel is coming up against it. ( Wellers)
Another problem I had was after adjusting the brakes when I replaced the wheel and tightened it I could not move the wheel. Any thoughts on this? I have slackened the brakes off till I could turn the wheel.

Just in case, you're not accidentally screwing it in the threaded holes that are used to push the drum off the hub for removal? They're the ones that are threaded on the drum and not countersunk.