daugen
Epic Contributor
good eyes Aaron. :thumbsup:
Todays shop time.
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ptsg
Super Member
Machined the new shaft for the worm drive of the tilting mechanism on the milling machine.
Fully machined on the lathe, including the hex for the wrench and the key way. It was a first for me to do a milling operation on the lathe.
For the key way on the shaft, I just held the part on one of the toolholders. For the hex part, I used a V block I made some time ago, attached it to another 90 degree fixture I had from completely unrelated machine. It worked perfectly.
You can also see the destruction on the original shaft. It does have a couple of faults on the design from factory. The smallest diameter, which will hold the worm and therefore have to deal with all the forces, only gets supported on one side (shaft side). I really don't understand why they didn't just drill the hole a bit further on the head of the milling machine, extended the shaft past the worm a bit, so it had support on both sides. The fault was that they used a woodruff key on the original shaft, this means that the slot is much deeper in the shaft, causing a weak spot.
Fully machined on the lathe, including the hex for the wrench and the key way. It was a first for me to do a milling operation on the lathe.
For the key way on the shaft, I just held the part on one of the toolholders. For the hex part, I used a V block I made some time ago, attached it to another 90 degree fixture I had from completely unrelated machine. It worked perfectly.
You can also see the destruction on the original shaft. It does have a couple of faults on the design from factory. The smallest diameter, which will hold the worm and therefore have to deal with all the forces, only gets supported on one side (shaft side). I really don't understand why they didn't just drill the hole a bit further on the head of the milling machine, extended the shaft past the worm a bit, so it had support on both sides. The fault was that they used a woodruff key on the original shaft, this means that the slot is much deeper in the shaft, causing a weak spot.
Big Barn
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Nice work on that shaft ptsg! Beautiful
LouNY
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Agree I enjoy seeing what a craftsman can do.
kevinwak
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this morning the wife asked me to build her a new napkin holder. This is what I came up with. Now for final sanding and to oil it!
OP
4570Man
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Cutting a radius on the corners and then a round over on the sides would make it nicer. Here’s a trick I use for cutting a perfect radius quickly. For one that small I’d just cut and sand it but for bigger ones I like to make a template to use a flush trim bit with. 
Sawyer Rob
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SR
dragoneggs
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Nice Rob! Appreciate you showing the layout and steps you took in the fab.
LouNY
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Nice,interesting work.
kevinwak
Platinum Member
yeah. That happened and the round over will also happen, just never got to it yet. Work got in the way.