Caliper bolt length

Southernlandy said:

Today I put the calipers on my rebuild. When I took them off to rebuild them, I had to drill one of the bolts out to remove it. When it came to putting them on the new bolts are longer than the old ones with a much shorter thread length. This meant that the bolts wouldn't go in far enough to secure the caliper. I solved this by putting a washer on the bolts but I'm sure this isn't safe so I was wondering whether there was more than one caliper bolt length?

Click to expand...

Southernlandy said:

Today I put the calipers on my rebuild. When I took them off to rebuild them, I had to drill one of the bolts out to remove it. When it came to putting them on the new bolts are longer than the old ones with a much shorter thread length. This meant that the bolts wouldn't go in far enough to secure the caliper. I solved this by putting a washer on the bolts but I'm sure this isn't safe so I was wondering whether there was more than one caliper bolt length?

Click to expand...

Southernlandy said:

I'm pretty sure the ones I took out were caliper bolts.....?

Click to expand...

Southernlandy said:

Thanks so much guys, It's amazing how you know all this stuff. I can sleep well tonight, only knowing that they'll have to come off again tomorrow

Click to expand...

jamesmartin said:

caliper bolts are supposed to have washer ,caliper is under quite a lot of stress when braking bolt is designed to have as much shank as possible in caliper,washer is WL112001L

Click to expand...

jamesmartin said:

12.9 is spec of caliper bolts,though shank length is important

Click to expand...

fanatic said:

Long term I agree and interestingly my motorbike the mounting bolts factory shear-known fault

Click to expand...

jamesmartin said:

agricultural shear bolts are high tensile but they are placed in a loose hole so movement shears them ,hence close fit of caliper bolts

Click to expand...