Timesaver lapping abrasive

I see it for $50 per pound on Ebay. Where do you get it?

Paul

Greetings Paul, It's made by Micro Surface Corp. in San Jose, CA. I bought the 8ea. 3 oz. can kit from Newman Tools. Here's a link:

It looks like McMaster carries it too:

Available Grits Each Each For Soft Metals

$9.00 for a 3-oz. jar from Micro Surface. Here's the Yellow grade. The othe rs should be selectable from the choices on the webpage.

IIRC, it's mostly silica or glass, at least for the hard (green) version ma de for ferrous metals. If you remember engine valve lapping compounds from

Or try

"Larry Jaques" wrote in message news: snipped-for-privacy@4ax.com...

I've often wondered how this lapping powder would work on say, a '66 GM 225 V-6 crankshaft. Use it to fine tune the clearances all at once. Solvent clean ofterward. Anyone try this? ;>) phil k.

Wouldn't the abrasive just get embedded in the insert? That's not good... sorry i posted the question. phil k.

Greetings Phil, The yellow label stuff is for lapping soft metals in just the kind of application you describe. I have lapped in many babbit bearings using Timsaver lapping compound. Mix the stuff with oil according to the instructions and apply through oil hole if the bearing has one or apply to bearing shells and assemble the bearing. The abrasive will not embed into the soft metal but will instead lap it. Conventional lapping compound, like the Clover stuff, will embed in the softer metal and lap the harder metal. Timesaver works opposite in that it will not embed and will lap the softer metal. Eric

Ok, that's good to know. Thanks for the input, eih? ;>)

Greetings Ed, When I bought my 8 can sample kit years ago I bought it directly from Micro Surface but had forgotten their name. When I looked for it online the other day Newman Tool was the first link. I had no idea they would mark up the same kit more than 200% over what Micro Surface charges. I'm glad you looked more and found that much cheaper price. The fact that it doesn't embed and laps the softer metal is quite useful in certain situations and I'm sure there are folks reading this group that could use it, especially at the much cheaper price you linked to. Thanks, Eric

thers should be selectable from the choices on the webpage.

onze-and-aluminum/

made for ferrous metals. If you remember engine valve lapping compounds fr om 50 or more years ago, they were ground glass for the same reason. It res ists embedding in cast iron valve seats.

I'm glad you brought it up, Eric. I've heard of it and I was curious, but I never checked it out before.

I remember reading an article about building benchrest rifles, and the auth or recommended it for lapping-in the lugs on a bolt action. That was the ha rd version, made for lapping steel.

From one of the MSDSes online, I see that the steel version also contains g arnet. That's another silicate, usually aluminum silicate, which is a good abrasive but it has two properties that sound right in line with the idea o f not embedding: it fractures easily, and it doesn't cleave into strong cry stal shapes. It just keeps breaking up.

So maybe I'll find a use for it. I used to do a lot of lapping, when I spen t a lot more time in the shop. I avoid using a toolpost grinder when I can, because I don't want that grit on my lathe bed.

We have 48 days before you pull that one, Phil. But, by all means, try that one on your own engine. ;)