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Old 11-01-2011, 09:54 PM
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Default Feed lever

For reasons I rather not get into, I broke the feed engagement lever on my Sheldon lathe, I didn't realize that the shaft and cam were one piece, made of cast iron. First I had to remove the apron take it apart and measure the shaft and cam, then put it back together and make a new one.

1-2 old part

3 Milled a square piece to the thickness and bored and reamed to 3/4"

4 Milled the 3/8" slots

5 Shaft turned to 1" and the end turned for a press fit into the new cam
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Last edited by digr; 11-01-2011 at 10:27 PM.
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Old 11-01-2011, 10:00 PM
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6 shaft pressed in

7 Chucked in the lathe and the profile turned

8 Old one in the rotary table to indicate the hole for the stop pin

9 Drilled for new pin

10 Just about there
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Old 11-01-2011, 10:10 PM
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11 Indicating hole for detent

12 Detent done

13 Test fit

14 put a key way with two set screws instead of the original tapered pin

15 all done
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Old 11-02-2011, 05:46 AM
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Thanks Digr. That was really a good tutorial. I won't even push for how you broke it.
When turning a piece of stock with 4 corners, like a square or rectangle, do you mill or saw the corners off a little before turning it to size? I'm always concerned that I'll break off the cutting tool, otherwise.
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Last edited by nctox; 11-02-2011 at 05:52 AM.
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Old 11-02-2011, 06:06 AM
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NC, I turned a couple of squares round and used high speed steel tooling instead of carbide, it takes the shock loading of an interrupted cut better that carbide does.
Digr, nice work as always.
Dan.
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Old 11-02-2011, 07:31 AM
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Quote:
Originally Posted by Lu47Dan View Post
NC, I turned a couple of squares round and used high speed steel tooling instead of carbide, it takes the shock loading of an interrupted cut better that carbide does.
Digr, nice work as always.
Dan.
Thanks Dan. I'll try HSS tools. I've got a few of various sizes.
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Old 11-02-2011, 07:36 AM
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Originally Posted by nctox View Post
Thanks Dan. I'll try HSS tools. I've got a few of various sizes.
+1 on HSS. You're not trying to set a land speed record anyway and interrupted cuts aren't kind to tooling.

Jeff
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Old 11-02-2011, 08:35 AM
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I normally try to avoid turning square things round in the lathe I just root around in the scrap box for a chunk of defective pipe.

If the part is not too thick and I can lay it out on a large enough surface I sometimes cut the excess away by plunging with a parting tool.
In this case there is a mill available so those corners would be gone before it hit the lathe.
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Old 11-02-2011, 09:22 AM
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Nice work. Wish I had your skills and equipment.
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Old 11-02-2011, 10:59 AM
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Very nice work. I will even second or third the HSS.
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