Snatching front brake(TLS)

[muskrat]

G'day BSA500. Modern bonding is as strong if not stronger than the old rivets. It also gives you more braking surface and can ware down further as there is no rivets. Snatching will occur if the shoes have worn to the point where the cam is almost at full lift and the drum isn't round any more through wear or over tightening the spokes.
Cheers

[BSA500]

I am comparing the rivetted shoes against the bonded purely on dimensions etc. The old shoes were the originals when i bought this off the shelf about 20 years ago(£25 if I remember right ). So they maybe a better option as they were made and fitted to the plate at the factory-I was told they were NOS. I am not saying the new type shoes are wrong, but they are being made 50 years later and I did get them off ebay with no obvious manufacturers markings. I don't remember the brake being horrible and snatchy when I first installed it, judder yes, evil snatching that scares the s**t out of me no 

[stu.andrews]

I have experienced the bonding of the linings to fail (on bonded linings of course!) due to rust on the shoes forcing the linings away. Riveted are better.

[Butch (cb)]

I have experienced the bonding of the linings to fail (on bonded linings of course!) due to rust on the shoes forcing the linings away. Riveted are better.

And I've had that happen on Brembo brake pads.

[BSA500]

I am in the process of getting the wheel ready for a drum skim. Checked the bearings a little notchy so have replaced them as the engineer said he sets the skim against the wheel bearings. While I was in the very cold shed I compared the original shoes against the aftermarket. The original shoe lining is 1/4 " ahead of the aftermarket shoe on the leading edge and the originals are a snugger fit into the brake plate. If that makes a difference we shall see 

[BSA500]

I know takes me ages to sort things. Got the drum skimmed and he found it was 5 thou out of round good/bad??. Now to organise brake shoe reline.

[BrianS]

http://villiersservices.co.uk/index.php?main_page=product_info&cPath=66&products_id=146&zenid=gvafbdogt3k3a5t2t4dmo80te6

[muskrat]

G'day Brian.
Thanks for that link. Wish they were down here.
Years ago I took my shoes to a local brake & clutch place. The old (90+) fella there asked what I'd be using it for. I said racing. "This is what you need sonny." Real asbestos with copper wire wound through it!!! Yep  it worked but I held my breath when removing the wheels!!!
Cheers

[BSA500]

I have a firm just up the road for me. EF Breen in Maidstone.

[Greybeard]

...Real asbestos with copper wire wound through it!!! Yep  it worked but I held my breath when removing the wheels!!!

Between 1968 and 1978 I was a motor mechanic. Back then brake dust was just blown out. Towards the end of my asbestos inhaling career I worked on a fleet of AEC artic tractor units. When you blow out the brake drums from those beasties the whole workshop is filled with a cloud of dust! 

[coater87]

I know takes me ages to sort things. Got the drum skimmed and he found it was 5 thou out of round good/bad??. Now to organise brake shoe reline.

 I skimmed my own drums and the back was out 3 and the front was 7. So your right in the ball park if that makes you feel better.

 Of course I had to go out 8 on the back to clean out the rivet mark PO left there (which really isn't that bad of a mark, for a bike I don't think they did anything to maintain)

 Lee

[BSA500]

Dropping the shoes off tomorrow and been quoted £8 per shoe 

[BSA500]

Both shoes relined for £19. Did a quick trail fit and they now rub. I am hoping the lining is not too thick  . Any idea the standard thickness of the brakes shoes of the 1968 TLS brake?. I have to set it up properly hoping the rubbing goes away,I might fiddle around tonight.

[BSA500]

I realised the shoes were rubbing because the shoes had gone 'over cam' as there was no cable holding them in the neutral position. Still bloody close to the drum now will only need a a small pull on the lever 

[JulianS]

The Ferodo catalogue gives the linings as 3/16 inch thick.