Originally posted by The Artful Bodger
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Russian machinists.
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Originally posted by plunger View PostThis is clever.
https://www.youtube.com/watch?v=iPA645QCLHE
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Originally posted by plunger View PostThis is another Russian machinist and Im fascinated how he drills at 40 seconds in the video. He doesn't even seem to bother with a pilot hole or center drill. I cannot believe how easy he makes it. I tried this with a 32mm drill in a predrilled hole the other day and my drill started spinning in my tailstock to my horror.
if you have to predrill keep the drill size quite small.
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Ya, some of the East European machinery is very well built. It reminds me of the older American machinery, same thing. The "baby" Axelson lathe could take say 60cm x 2 meters but it weighed ~8 tons!
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I think he is relying on the steel gear to lap the brass gear to get it too mesh properly. He has quite a few ideas that are almost there like his triangular drill bit. It was quite ingenious how he machined it.
I just love their lathes.
They are butt ugly but you can see they are built like a russian tank.
They just look very rigid for such a small footprint.
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Originally posted by nickel-city-fab View PostYears ago I was hired to run a large radial drill, it was nothing to plunge 2" (50mm) thru 10" (800mm) in one go. All Morse taper shanks with coolant thru.
That was a lifetime ago.
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Years ago I was hired to run a large radial drill, it was nothing to plunge 2" (50mm) thru 10" (800mm) in one go. All Morse taper shanks with coolant thru.
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Originally posted by plunger View PostThis is another Russian machinist and Im fascinated how he drills at 40 seconds in the video. He doesn't even seem to bother with a pilot hole or center drill. I cannot believe how easy he makes it. I tried this with a 32mm drill in a predrilled hole the other day and my drill started spinning in my tailstock to my horror.
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Originally posted by plunger View PostSome more interesting stuff. What do you think the orange material is . This is a very interesting alternative to making a gear.
https://www.youtube.com/watch?v=qb9C7qCkbG0
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Some more interesting stuff. What do you think the orange material is . This is a very interesting alternative to making a gear.
https://www.youtube.com/watch?v=qb9C7qCkbG0
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When I was learning how to sharpen drills, I did a 142 degree 4-facet split point on a 1" MT3 drill bit. Drilled thru mild steel with no pilot and no effort! I was amazed.
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Sorry I forgot to attach the youtube video. Have a look at 40 seconds.
https://www.youtube.com/watch?v=OFiJPECzZo8&t=238s
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I wonder about a down and dirty home brew that could be made with about 1/20th the effort and perhaps potentially even better results,,, instead of two ball bearings and his shield, just take a ball endmill to the business side and sink it about 3/4's deep, if you want to get fancy drill a small hole in the center then a 90 degree connecting hole for gravity oil feed, Stuff a ball into it, walla - it's going to rotate and also allow the higher unit pressure business end of the ball, and even the side forces are better off then what he's got,,, I think it might work just as good maybe even better...
EDIT; I just tried my theory out - could not get the ball to rotate it just dragged --- but my ball end mills are old HSS junk and smaller than the ball so I was side stepping to get the ball to fit in, still no luv, im thinking the piece holding the ball would have to be hardened --- and i was just using mild 1045
don't know - if anyone can make it work lmk thanksLast edited by A.K. Boomer; 08-24-2021, 03:39 PM.
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