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+--- Thread: Todays Project - What did you do today? (/thread-727.html)
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RE: Todays Project - What did you do today? - DaveH - 03-20-2014
Excellent work Ken, a really superb looking thread.
Exceptional skillful bit of turning
DaveH
RE: Todays Project - What did you do today? - PixMan - 03-20-2014
Thanks Dave.
What's strange to me is that the final 14ยบ compound infeed depth to get the 22ER-5ACME threading insert to cut the crest of the thread (barely) was .132", when my Acme thread gage defined depth of a 5 pitch acme thread to be .100" + .010".
Using my limited trigonometry knowledge to calculate, I came up with infeed of .1291", not too far off.
RE: Todays Project - What did you do today? - dallen - 03-20-2014
fired up the furnace and casted these two plates for HOPEFULLY a small cnc router that I am putting together
DA
[attachment=7950]
RE: Todays Project - What did you do today? - stevec - 03-20-2014
I love it! Using the ancient skills of casting to make parts for a CNC machine.
Just shows that we wouldn't be here if those before us were never there.
RE: Todays Project - What did you do today? - dallen - 03-20-2014
(03-20-2014, 07:17 PM)stevec Wrote: I love it! Using the ancient skills of casting to make parts for a CNC machine.
Just shows that we wouldn't be here if those before us were never there.
beats buying 40 dollars worth of aluminum plate too.
DA
RE: Todays Project - What did you do today? - awemawson - 03-21-2014
DA,
I reckon you're pulling our string - you cut those from plate :) Superb finish for cast. What sand are you using ?
RE: Todays Project - What did you do today? - Mayhem - 03-21-2014
Dave - was that an open mould or two-piece?
RE: Todays Project - What did you do today? - dallen - 03-21-2014
home mixed oil bonded sand, and a two part mold. Oil bonded sand is hard to work with when its cold so the first one that I poured was a little rough around the edges, the second was a lot better pour but I lost the bearing in the back of the vac motor I use for a burner blower so melt was really fun with a half a crucible full of half melted aluminum when the blower gave up the blue smoke.
RE: Todays Project - What did you do today? - Hawkeye - 03-21-2014
Not just today's work. I'm working toward making a threading dial for my Storebro lathe. 4tpi leadscrew. I messed up the only brass washer, so I decided to cut the gear out of 3/16" ABS plastic. If anyone wants to get into making gears, I recommend trying it first in plastic. It's really easy to cut and will prove or disprove your setup and the shape of your cutter.
The dividing head was tilted to 5* to allow for the helix of the leascrew. 16 teeth on the gear.
[attachment=7953]
It fits the leadscrew well. There isn't much stress in turning the dial, so plastic should give good service.
[attachment=7954]
Today's job was to finish a spindle nut I started yesterday. Most of the tooling I use in the spindle is MT3, but the spindle is MT4. When I go to drift out the tooling, the sleeve usually lets go first. Then I have to separate the MT3 tool from the sleeve. I figured a nut would hold the sleeve while the tool is being tapped out.
[attachment=7955]
If I loosen the nut a turn or two, the sleeve should loosen first, then the tool can be released. After that, removing the nut will allow both to be removed.
RE: Todays Project - What did you do today? - awemawson - 03-22-2014
(03-21-2014, 08:06 AM)dallen Wrote: home mixed oil bonded sand, and a two part mold. Oil bonded sand is hard to work with when its cold so the first one that I poured was a little rough around the edges, the second was a lot better pour but I lost the bearing in the back of the vac motor I use for a burner blower so melt was really fun with a half a crucible full of half melted aluminum when the blower gave up the blue smoke.
Is it your own recipe and can you share it ?