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Post by cozybldr on Mar 17, 2011 20:43:20 GMT -7
Ok, I have to ask how you guys, that use a lathe, chuck the BSA wheels in the lathe to run the hubs true?
Do you make your own mandrel or use a commercial one?
If you do make your own mandrel or modify one, what is planform?
I thought I read somebody using a #2 nail to square 4 wheels with The Block on a drill press. How exactly does that work?
My equipment:
Logan 210 10x24 lathe
16 speed floor mounted drill press
Bridgeport 1J clone milling machine
I do know how to run a lathe. The problem I am running into keeping the wheels concentric on the mandrels I bought without over pressing them.
___, the Block and goodies arrived *** TODAY ***. Thanks!
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Post by strattocoaster on Mar 18, 2011 6:30:55 GMT -7
I made my own mandrel from a dremel mandrel. I have not tried to use it for weight reduction, just trueing up the O.D.
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Post by Advance The Man on Mar 18, 2011 9:54:44 GMT -7
Willing to share a picture?  |
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Post by Advance The Man on Mar 18, 2011 10:28:11 GMT -7
I just chuck up a 3/16" piece of steel round stock in a collet and cut it to .001-.002" bigger than the wheel bore. I sand it until I get a slight press fit with the wheel. It takes some time to get the fit just right and if you do enough wheels you will have a few of these mandrels for the different sized BSA wheel bores. Too tight and you screw up the wheel bore, too loose and you can't cut anything because the wheel spins. Do you slide multiple wheels on at a time to speed up setup? When you work on the inner side, do you use this also? |
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Post by Advance The Man on Mar 18, 2011 10:54:33 GMT -7
No... right or wrong I do one wheel at a time. I want to cut everything that I can on the same set-up. Yes, I can cut everything this way. I can cut od, outer hub, edge & inside with the same set-up... I have to flip the wheel to get to the outer hub... What tool do you use to remove outer step? Did you just make your own cutting tool from a blank? Thanks |
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Post by strattocoaster on Mar 18, 2011 11:55:47 GMT -7
I'm new to this lathe/pinewood derby thing but when I make the mandrel with the dremel mandrel, the screw provides that extra bit of tension that would otherwise let the wheel spin.
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Post by cozybldr on Mar 18, 2011 13:47:10 GMT -7
When I did my inner side, I used the 3-jaw chuck with soft jaws to hold the wheel. This probably not the best way. I also turned a .001" flat on the inner hub.
Glen, comments?
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Post by Shade Racing on Mar 18, 2011 17:21:40 GMT -7
I made my mandrel out of a peace of brass then I have a aluminum tube I put over wheel hub with a live center at other end of tube to help to hold wheel tight & true
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Post by cozybldr on Mar 18, 2011 20:43:49 GMT -7
That is a fantastic idea! I should have thought of that.
Thanks!
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Post by Shade Racing on Mar 20, 2011 16:11:14 GMT -7
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Post by Advance The Man on Mar 20, 2011 16:27:33 GMT -7
Thanks Shade. Very helpful with the pictures. Where do folks purchase brass, aluminum, steel rods?
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Post by Shade Racing on Mar 20, 2011 17:23:05 GMT -7
the brass is from a old brass punch I had; Mcmaster- Carr has some on their site you can order
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Post by cygnus on Mar 20, 2011 21:23:23 GMT -7
Thanks Shade! You deserve some karma for those pics!! I have a lot of respect for people who can figure out things like that. The next puzzle, for me anyway, is what's the setup for coning the inside hub, and for removing the double step in the outside hub. Would you care to share some pics for those setups? |
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Post by Advance The Man on Mar 21, 2011 3:29:46 GMT -7
Thanks Shade! You deserve some karma for those pics!! I have a lot of respect for people who can figure out things like that. The next puzzle, for me anyway, is what's the setup for coning the inside hub, and for removing the double step in the outside hub. Would you care to share some pics for those setups? Agreed, you have to think outside the box to come up with these setups. I clearly don't have that talent. Regarding double step, 5 Kids posted earlier in the thread what he uses. |
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Post by cozybldr on Mar 21, 2011 6:24:19 GMT -7
Go to your local small machine shop or use onlinemetals.com
Either one will have what you need.
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