I'd be more worried about it overloading the tailstock. How about finding a cheaper version of this.
Put a can foil on the cutting edges of the drill to avoid damages both to the bit and the jawsWell a little bit more bored out on the bracket and the bush is a very nice tight slip fit.
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And now the 4 jaw has been freed up I've found that it's big enough to get a decent hold on the drill. Just need to source an MT3 live centre to support the other end and I should be able to turn down the taper on the big drill.
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Thats called a feature in my bookOne of the gaps was slightly too large for my little 18v Bosch drill, but a bit of orange gas pipe slit down the length and slipped over the bar narrowed it down nicely.
Only took three years, I reground the threading tool and cut and O ring groove in the funnel;I made this old air pump suck twice as much.
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I've had it in my treasure pile for years waiting for a use. It occurred to me today it might work for vacuum filtration, so I stuck a gauge on it and the needle was bouncing between about 375 and 500 Torr, which dropped back to zero almost immediately. I took it apart expecting to find the diaphragms all perished and leaky but luckily they were fine, the reed valves however were seriously manky:
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The tar came off easily enough but the sealing faces were corroded and pitted so I cleaned them up with wetstones, working up to 8000 grit, much better now (I didn't bother cleaning the pitting off the back face).
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Tiny drop of light oil should keep them sealing tight, all back together and it easily pulls 625 Torr, which takes a few seconds to bleed back down to zero now. I put another gauge on the output and it makes it to 40psi before the PRV opens, not bad at all. No idea what it's rated for, where it came from or what it was used for, quality little unit though. There's a small leak where the diaphragm meets the casting, it's not a machined face so I might pull it apart again and see if a light skim on the lathe can get it to seal, maybe get a few more Torr out of it.
I of course had to try filtering something so had a rummage around and found a cute little side arm flask, a bung that didn't fit it and a narrow stem funnel (Exactly the type you wouldn't use for filtration). Cut a circle out of a coffee filter, filled it with cutting fluid, fired up the pump and it pulled it through in less than a second.
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Looks like my cunning plan is gonna work, next job will be to make a big special Büchner funnel, something like this:
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Stay tuned.![]()
I use aluminium beer can sides.That's a good idea. Was going to do cardboard but that will work better. Or I've got some thin Ali sheet somewhere I can wrap around it.
Going to struggle to find anything but aluminium beverage cans these days.I use aluminium beer can sides.
Boddingtons cans are steel.Going to struggle to find anything but aluminium beverage cans these days.
Going to struggle to find anything but aluminium beverage cans these days.
Alloy again and are weak.Every try the John Smith's can crush challenge back in the day? Those cans were super tough.
Beer in cans?!I use aluminium beer can sides.