What's The Best Steel To Use ?

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Scruffy

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image.jpg image.jpg While winching my 16 in shaper out of a house basement , several years ago this happened. The down feed screw hit the top of the door way, bending it over Badley. I tried to straighten it.
Didn't work, so I cut the short end off and made a piece. Press fit with loc-tite. Lasted a few hours of use.
Next I chamfered both pieces and had the neighbor tig weld it. Looked great but had to turn most of how weld off to get a flat surface on the bottom of the collar. Lasted a couple of hours.
Tomorrow I'm going to put big deep chamfers on both pieces and have him tig it again.
If that doesn't hold I was wondering what steel to make the new one out of? A file easily cuts the old one. The shaper was made around 1908 as close as I can date it.
I have a decent lathe to do the threading, just not much know how.

Open to suggestions?

Thanks Ron here's some pics
 
O1 drill rod should do the trick.
 
Face both ends, use a threaded rod into both pieces to splice them. Depending on the part you may need to add a spacer to account for the faced off material. And maybe a bit of welding around the splice. Don't use locktite if you plan to weld.

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perhaps some 1018 hot rolled, would be a good candidate for consideration.
 
Strength is not an issue. Go for something that cuts nicely. Is that collar integral? If it is, then that is a pretty good sized piece of bar. As Eddy said, O1 is a good choice, but is overkill, and can get expensive for a big piece.

Almost any plain carbon steel will be fine. Depending how fussy you are, threading that long a rod can present quite a challenge. I have made 3 lead screws and I found it a challenge to manage deflection of the work piece. It was driving me nuts, because I like cutting threads - I thought it was going to be easy.

In order to cut that long a thread, there are a few ways to approach it (depends on what you have for equipment). It will be interesting to see what responses you get.
 
I'm with Ulmadoc on the 1018.
Red Loctite and a taper pin.
Press fit if you are able. But, that might negate the Red Loctite.

Daryl
MN
 
For repair, I would as said, pin or Loctite. For new, I would make out of 1144 stressproof. It cuts easily and is about RC20…Good Luck, Dave.
 
Thanks for the responses, Ivan always count on you guys.
Here's a little more detail: yes collar is intergal part of the shaft, it is 1.180 od
Shaft is total of 15 in long, large thread is .626 od - 8 .5 in long.
Small end thread is .360 od.
Their seems to be a shock load when the cutter first starts. It is a shaper.
As far as equipment I have a 16 by 54 American pace maker but no follow rest . I could chuck it so I would be threading 8 .5 inches. It's acme thread I believe. What's the best way to check?
Thanks ron
 
First I would take the long piece and face the disc and drill a 3/8" hole to half way to the under cut. Then make the short piece with a stub to press in then pin it.
 
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