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what do you use as a lap? is annealed copper o.k.? and what compound? will diamond imbed?
what do you use as a lap? is annealed copper o.k.? and what compound? will diamond imbed?
Bronze, I'm actually used to scraping, not lapping. The lube does the rest.
I'd seen Herr Pelz make a new Bronze bearing for an ancient B&S SG and have his wedge-shape German DI hold under half of its fifty-millionths division. No lapping required.
Bronze is also ameneble to "working". As-in stretching the bore, or hammering over a mandrel, clean-up pass on the OD.
But have a read, our own late and lamented "Texas Turnado" and his last-ever project. The rebuild of a Graziano TS, "Right here, on PM", even.
He teased through a shop-fab lap design and application that ultimately worked a treat:
Is it possible to hone the bore of a tailstock accurately enough in a home shop?
As importantly, there was a ton of discussion wrapped into the thread as covers it all really well.
Do keep in mind that bearing Bronze and CI are not the same goods? As-in mayhap the LAP should be CI?
what do you use as a lap? is annealed copper o.k.? and what compound? will diamond imbed?
edit: a bushing out of bearing-bronze sliding on a shaft, where i want to controll the fit.
i didn't know there were 0.1 Mu indicators,they must be very rare.
its what we call "rg7" (CuSn7ZnPb) with a hardness around 70 hb. im looking at sizes of 30, 40 and 50 mm, so an adjustable reamer would be nice, but i wouldnt know where to get one that big and im sure i couldnt aford it. splitting it is an option (and adding a housing with a differential screw) but im trying to keep it simple.
i didn't know there were 0.1 Mu indicators,they must be very rare.
how much is a 50 mm bearing ball (i need a few bushings in several sizes)? and how do i adjust the fit?
nice to know. i wonder how you adjust the height on this: C.E.Johansson 510 E-4 Mikrokator .000010" Dial Indicator & Stand Calibrated 2019 | eBay
black thumbscrew? it seems to be pinching a collar.
(you might be in the wrong thread.)
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