Barrett B-75BS True-Arc Brake Shoe Grinder

[motordr]

In my quest to do the best brake job on my A and my 32 I have just picked up a brake shoe grinder. It requires an 8 1/4" diameter abrasive disc, Cat. # 99A-36, part number 80-1240-1.
My sales rep has no idea what I am talking about, so, experts, what do you use as a substitute and where to you get it?
Thanks for your suggestions. Ted

[Bob C]

Maybe something like this would work.
http://www.grainger.com/category/abr...ts_optout=true

Bob

[motordr]

Thanks Bob, that looks like a good resource. I hope to hear what works for others in terms of grade,Grit, open/ closed, cloth or paper backed. Ted

[BRENT in 10-uh-C]

Yes, look at woodshop supply companies where they sell orbital disc sanders. My brake grinder spins at a high RPM, and we generally do not need to take off much material so an 80 - 120 grit is fine.

[Wilky]

I purchased a vintage brake shoe grinder from the local NAPA dealer - a different brand than yours, and parts were no longer available. I needed abrasive belts for mine and found a good source for shop equipment at: Goodson.com
Possibly they can help you too. They were very good to work with.
John

[Kurt in NJ]

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I have original sanding discs that came with the 2nd brake doktor, they are much more coarse than I picked from harbor freight selection for the first one, even though the discs are 50+ years past the expiration date they still stick ---they are about 36-50 grit, can't take pictures till the weekend

[motordr]

Thanks Brent, John and Kurt. I was thinking with the part number as A-36, that it might refer to the coarseness. Will keep looking.

[Marco Tahtaras]

Originally Posted by motordr

Thanks Brent, John and Kurt. I was thinking with the part number as A-36, that it might refer to the coarseness. Will keep looking.

Yes, I believe the disks for your unit came in 24 or 36 grit. There may have been one SLIGHTLY finer.

[motordr]

Thanks Marco. I will see what I can find. Now to find a drum lathe with the 11/16" spindle.

[motordr]

40 grit seems to be the most popular for brake shoe grinding sleeves that Goodson sells, so that narrows my search. Now is that open or closed?

[KR500]

motordoc, There is presently a Barrett 11/16-1 inch arbor on EBay. $99.00 Search under Ammco. Is your brake lathe a Barrett?

[motordr]

KR500, I don't have a brake lathe yet. I am just now starting my search. Ted

[motordr]

An update on the abrasive disc, I bought a Norton Metalite R228 PSA Disc, Cotton backing, Pressure sensitive adhesive, aluminum oxide, 24" diameter, 40 grit for $7.80 plus shipping on Amazon. I cut out an 8 1/4" disc and put it on. Works great and I can get a few more discs out of it if needed.
Now I just need to figure out why it is not grinding a true arc.
I also just bought an Ammco 4000 drum lathe with all the tooling. It does a beautiful job turning front drums.
I have the Ammco 9708 11/16" Arbor kit coming this week. Can't wait to see how it works turning rear drums. Ted

[Bob C]

Do you have the instructions for the grinder?

Bob

[motordr]

Originally Posted by Bob C

Do you have the instructions for the grinder?

Bob

Yes, I do Bob.