staehpj1

Anyone know what size and how many balls are in the Shimano SPD M737 pedal?

I have a pedal that was field assembled missing a few balls (don't ask) and don't want to take it apart before I have new bearings in hand if possible.

Pete

DMF 

The pedal innards I've seen don't use discrete balls and races. They use an integrated bearing (two, actually). Replace the bearing as a unit.

well biked

I've serviced pedals with loose ball bearings before, but I don't know the exact size of the bearings. Nashbar used to carry the various sizes of commonly used bicycle ball bearings, and I do remember that the pedal bearings were the smallest ones available. I'm not sure if Nashbar carries loose ball bearings anymore or not-

Svr

The 'ol memory is a bit fuzzy, but they're pretty small, like 1/16" or 1/32". I'd disassemble the pedal and measure to be sure. Sorry I couldn't be more help.

cascade168

They are 3/32". You need 62 of them to service a set of pedals.

2372ighost

And here they are:
https://www.loosescrews.com/index.cgi...d=761229431223

staehpj1

Thanks. I ordered a bag of 100. I have another question though...
31 per pedal is an uneven number and I thought they had the same race on both ends. Do you recall how many went in which race? I thought it was less, like maybe 12. If all else fails I guess I can just fill them and take out 1.

I recall them being a real PITA to assemble because they can fall into places where they seem to be OK but really aren't properly in the race (particularly on the outer race). Any tips that help make assembly less tedious or is it just a matter of painstakingly putting each individual ball in place with tweezers or the magnetized tip of a pointy tool?

Soil_Sampler

The spindle is made of cast Cro-moly steel, that has a threaded nylon "sleeve" or lock nut. This lock nut is what threads into the body. A separate steel bearing race with twelve 2.2mm steel ball bearings for the inner bearing assembly is at the end of the sleeve. A steel tube with cupped ends makes both bearing cups, followed by twelve more 2.2mm bearings and a nutted steel race. The bearings are adjustable. These parts together make a single spindle and bearing assembly that threads into the body.

https://www.bikepro.com/products/pedals/shimspd.html

cascade168

It's been a while since I did one. The number of bearings I gave is from current SPD models, so you may have more, or less.

They are not that difficult to work with. I put a little grease in a cup (actually, I use an Altoids tin - perfect!) and then put the balls in the grease. Put a little grease in the race and then stick the balls on the race, one by one. I use a pair of tweezers and that works great. Just take a minute and count the balls in each race as you disassemble the axle and you should be good to go.

Although you can do this job without one, the Shimano PD33 or PD63 tools make adjusting and locking the bearings much easier.