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A few freebies

Used to run my CNC mill with a 2hp Boston Ace-KL inverter. I'd done only minimal setup, mainly programming a bit of ramp up to ease strain and lower inrush a bit. What I failed to note, was that there was a ramp down programmed. So, I'm hitting the spindle brake soon as I cut the power, not realizing the inverter is fighting that brake trying to ramp the motor down at a set rate. Took a while, but this eventually blew both capacitors in the inverter, blowing one clean off the board! This generated one heck of a power spike back throughout the house, messing up one of my computers. The inverter was E-wasted long ago. But I still have the remote control panel I'd mounted in a die cast aluminum box, and have the manual. I cannot guarantee this panel still works, given the power surge, so it's free, you pay shipping and takes your chances. Pretty sure I can ship the manual media mail, there's no advertising in it, the panel fits a fairly small box.

Next up are two yard sale 'scores' that have been sitting around here far too long.

First is a Dumore hand grinder. If I'm reading the plaque right, it's a model 10-121. 110v, 22,000 rpm. Missing screws to secure back case, brushes, brush caps, and a threaded cap at the chuck end. Has Jacobs No.

0 chuck. Bearings are -shot-. It's a rebuild project, and it's been sitting on the shelf for some 30 years. Someone, somewhere, must have the time and initiative to fix this? Will ship in a flat rate Priority box, $5.60.

Last item, a big ol' Chicago Pneumatic 1/2" electric drill. This is a BIG sucker, would take you for a ride if you hung a drill. IF it was working. Another fix-it-up project I never got around to. One of the cast aluminum brush holders was broken. Have all the other parts, and drew up the holder from the good one. I can export this as a 3D DXF file and email. If you want to try carving out a new brush holder (I'd suggest making two, since the OEM seems brittle), you'll have a nice drill. Ok, just double checked, not sure what I did with the insulating block the brush holder would be riveted to. Wouldn't be hard to make from phenolic, and in lieu of the copper spring connectors for the wires, a small wire nut would work, or solder and tape. Hey, it's free, but it's gonna cost you a bit of work. You won't find a drill anywhere near this quality at Harbor Freight, that's for sure. Sucker is -heavy-, have to check, might fit a large Priority flat rate box, else probably cheaper to ship FedEx Ground.

Yeah, buyer pays shipping, or in the unlikely even you are within driving distance to Grass Valley, you are welcome to pick up.

Jon

Reply to
janders
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Ive got one of those..and its a wonderful (though heavy) drill. Ive managed to bust Silver and Demming drill bits with it.

Reply to
Gunner Asch

I've got an even bigger one that works, with MT2 spindle, and 1/2" chuck mounted. I'm pondering if I want to buy a step down transformer big enough to handle it, or sell it. I'd picked up this one, wanting the shorter length, never got around to fixing it... I did btw, find the insulating block and electrical spring clip, so only needs the brush holders made up and it should be good to go.

Jon

Reply to
janders

Mine is gear reduced. So at most..it turns something like 350 rpm. I wound up putting 18" long pipe in the threaded handle holes (3/4") because when one hangs a bit..that sonofabitch will sweep you right off your feet.

I had one that was 12vt dc that was even worse. And had NO reverse. You had to reverse the power polarity. I literally hung a 1.25" drill bit while chugging through a piece of 2" plate..and it hung and swung so hard that I bent..bent the 3/4" black pipe handle that was at least 18" long.

A guy came by wanting to borrow a "really strong drill" and I simply gave it to him with a rather tame warning. I never much cared for him.

And I dont miss it in the slightest. No idea who made it..but that sombitch was STRONG!! drill motor.

I dont remember where I got it from but it was given to me by someone with a very strong warning about it being a man crippler.

As I remember..it was slightly bigger than a Millwaukee 12vt corded drill, but about 2x as heavy and came up to speed slowly..but you couldnt stop the bastard.

Probably came from an electric utility company or somesuch.

Im glad I got rid of it.

Gunner

Reply to
Gunner Asch

30 years ago, i used one of these to try and start a Gravely lawn tractor engine. it backfired and broke my thumb clear back so it was laying along side my wrist. it still hurts when it gets cold outside.

Karl

Reply to
Karl Townsend

I got rid of a geared down 1/2" handle with Bar and one hand handle. That one didn't have a clutch or brake... If it snagged on the metal and you let the trigger go - the gears wound down twisting you up in the power cord and wacked out elbows with the quick snap.

Gave that one away. Instructed the person to make a drill press out of it and have it - the press - bolted to the floor and or wall.

I got a 1/2" instant brake and vari-speed. The hammer part is good on cement.

Mart> >

Reply to
Martin Eastburn

This would likely do the same... Reminds me of something I saw at NASA Ames in the 70's. They have a wind tunnel that has a very large vertical pressure chamber filled with ceramic balls. Air is passed through this to bring it to high temps, whence it is then ducted to the test chamber. It's obviously for testing reentry and other very high speed models. There were 3 different tapered sections between this tank and the test chamber, I surmise the different tapers affected air speed. One night, they had a catastrophic failure of one of the bolted flanges while at temp and pressure, blowing very hot ceramic balls all over the room. It looked like Paul Bunyan shot up the entire room with a giant shotgun! Blew sections of roof off, and all but caved in some steel cabinets. Good thing the technicians were in a well protected side room...

Anyway, there were Inconel plates at the bottom of the vertical chamber that warped from the rapid cooling, and the metal shop was tasked with removing and straightening them. I was involved as a student helper. I don't recall the size of the studs/nuts that held the top on, but I do well remember the massive pneumatic impact wrench the journeymen used to remove the nuts. Must have had 6' long handles on both sides! Not quite as likely to sweep someone off their feet, but that wrench sure impressed the hell out of me!

Jon

Reply to
janders

The hand grinder and drill are gone, leaving only the remote panel for the Boston Ace-KL inverter. I'm guessing nobody's going to be interested in that, so it's off to E-waste. However, have two manuals for the Ace-KL. Anyone wants them, available for the cost of postage.

Jon

Reply to
janders

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