biax scraper repair/rebuild

Others, including me, are also interested in some repairs to the old Biax scrapers. The way to repair #78 is to remove it, surface grind it flat, and then shim it back to original thickness, preferably in pairs, together. The shoe that rubs on them can also be surface ground, though it is a bit more fussy to set up to grind. I see no need for new parts there unless there is severe damage aside from wear. After getting them correct, keep them oiled regularly!
 
with an armature stick the armature can be cleaned easier then turning . Only the sticks are hard to find and costly last one I got from Grainger s was over thirty dollars in 1987.

they are called Commutator Stones,
i used my share and someone else's- i repaired electric forklift motors of all sizes and ratings, by the score.

the comm stones come in a variety of sizes and grit
 
Hi Ken thanks for the info on the steel. Is the shoe cast iron so it is cast on steel? Or is there supposed to be some sort of lubricant between them?
 
Hi Ken thanks for the info on the steel. Is the shoe cast iron so it is cast on steel? Or is there supposed to be some sort of lubricant between them?
I'll have to pull mine out and take a look at it. I doubt the shoe would be cast iron, more than likely harden steel of some grade. As for lubrication, somewhere in the 10 page book to the scraper, it says something on the order to apply a few drops of oil to the slide every once in a while. Have to remember, mine is one of the old blue one's that's over 25 years old. Maybe closer to 40 years old.
 
So hardened steel on hardened steel? And no onvious means of lubrication like a oil port or oil grooves etc? I would never have expected that.
 
So hardened steel on hardened steel? And no onvious means of lubrication like a oil port or oil grooves etc? I would never have expected that.
The harden steel has some kind of hard coating that resists galling. More than likely, it's been nitrided. Nitriding has some anti galling properties.

Ken
 
The wear on my Biax slides is much less than the wear on the exterior of the machine. It must have been used to death, and it still works fine, just loose in the flat slides. Looseness in the slides can contribute to digging the corners of the scraper blade in to the work, which can be discouraging. I would like to fix mine, but am not yet sure of what I am doing. As far as lube goes, I think I will be using way oil, often but sparingly, and cleaning the slides regularly.
 
Others, including me, are also interested in some repairs to the old Biax scrapers. The way to repair #78 is to remove it, surface grind it flat, and then shim it back to original thickness, preferably in pairs, together. The shoe that rubs on them can also be surface ground, though it is a bit more fussy to set up to grind. I see no need for new parts there unless there is severe damage aside from wear. After getting them correct, keep them oiled regularly!
That’s a cute little grinder in the video! Could it be a Stent kit?
 
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