the people who sell this welder in Canada are a bunch of morons. They sell the welders in Canada but don't have any kind of technical help.
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T head engine by Brian
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"A machinist's (WHAP!) best friend (WHAP! WHAP!) is his hammer. (WHAP!)" - Fred Tanner, foreman, Lunenburg Foundry and Engineering machine shop, circa 1979
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Originally posted by brian Rupnow View PostI've been welding for about a hundred years now with oxy acetylene, stick, and Mig. The TIG is quite new to me, but I do have a LOT of previous welding experience. I built and raced hot-rods for most of my life. If you want to learn to weld nearly everything, just build a hot-rod.25 miles north of Buffalo NY, USA
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Today I machined a fan, and done something dumb. The fan and pulley are silver soldered together, and the hub has a recess for two ball bearings and a spacer. They are in a blind hole, and all of my reamers have a chamfer on the end. To get around having a chamfer in there, I cut the counterbore with a 3/8" endmill. Dumb move. A 3/8" endmill cuts a hole about 0.010" oversize, enough to make the hub go all "wobblycock" on the bearings. My fix is to mount the fan and hub in the 3 jaw chuck, and mount the fan shaft and bearings in the tailstock chuck. Liberally coat o.d. of bearings and spacer with J.B. Weld, then advance the tailstock ram until everything is where it should be linearly. If I've lived a good clean life (Ha-Ha), everything should be aligned when get up tomorrow.
Brian Rupnow
Design engineer
Barrie, Ontario, Canada
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Knowing how to fix a cock up is a mark of the professional!Last edited by The Artful Bodger; 09-09-2021, 10:18 PM.
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This morning I brought all the drawings up to date and saved them as .pdf files. There are 43 drawings, and some have multiple sheets, so there are about 50 drawings in all. Each component has a detail sheet, and the main overall assembly has parts lists and identifying part numbers and bills of material. I have a bit of finish work to complete on the fan components, but the drawings are complete and included in the package. I sell a complete set of these drawings for $25 Canadian funds, paid to Paypal to [email protected] ---BrianBrian Rupnow
Design engineer
Barrie, Ontario, Canada
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Originally posted by brian Rupnow View PostToday I machined a fan, and done something dumb. The fan and pulley are silver soldered together, and the hub has a recess for two ball bearings and a spacer. They are in a blind hole, and all of my reamers have a chamfer on the end. To get around having a chamfer in there, I cut the counterbore with a 3/8" endmill. Dumb move. A 3/8" endmill cuts a hole about 0.010" oversize, enough to make the hub go all "wobblycock" on the bearings. My fix is to mount the fan and hub in the 3 jaw chuck, and mount the fan shaft and bearings in the tailstock chuck. Liberally coat o.d. of bearings and spacer with J.B. Weld, then advance the tailstock ram until everything is where it should be linearly. If I've lived a good clean life (Ha-Ha), everything should be aligned when get up tomorrow]
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Today was painting day. I picked up a can of orange Tremclad paint, because that was the only color that I hadn't used already. The fan can be flat back, it's not that important. The aluminum gear covers didn't really need to be painted, but there were enough dings and low spots in them that I filled all the low spots with J.B.Weld yesterday, sanded it smooth this morning and gave them a double coat of aluminum paint. I wish there was a filler that matched the raw aluminum color exactly, but if there is I don't know about it. Now, it seems like I've worked myself out of a job for the time being, so the rest of the day will be spent doing not much---Ahhhh
Brian Rupnow
Design engineer
Barrie, Ontario, Canada
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Originally posted by brian Rupnow View Post. . .A 3/8" endmill cuts a hole about 0.010" oversize. . .
Last edited by chipmaker4130; 09-10-2021, 04:00 PM.Southwest Utah
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That explains it. Tailstock & chuck, by which I'd guess you mean drill chuck. You'll get a very precise hole if you set it up in your mill with a collet. All small lathes have too much flex in the tailstock ram, not to mention the drill chuck, to get good results with an endmill.Southwest Utah
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