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Old 05-27-2017, 08:09 PM
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Default New Drawbar For The Rockwell Mill

If I can get the company leaves me alone, I'll actually get the mill, making chips.I've been out of town for the last 2 weeks, working on the installation of a new burner on a boiler and the fabrication and installation, of a new stack damper on another boiler, with 300 miles separating the two jobs.

Today, I was going to cut a 3/16" keyway in a 3/4" shaft, I went to tighten the ER 32 x R8 collet chuck and the drawbar stripped, the thread just rolled right off. So in the morning I'll make a new drawbar, I have a a 12' length of 7/16"-20 B-7 hardened all-thread, with that I'll have to make a nut assembly.
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Old 05-27-2017, 08:41 PM
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Quote:
Originally Posted by platypus20 View Post
I have a a 12' length of 7/16"-20 B-7 hardened all-thread
You know what, I have one made out that too, I think.
It's a backup for Mildred's original but we haven't needed it yet.
It's just a comforting thing to have in case you need it.
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Old 05-27-2017, 08:44 PM
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12 feet should get it done!
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Old 05-28-2017, 10:04 AM
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Several years ago when I was still in the year-long project of setting up & learning to play with the little Charlie Atlas lathe I needed a short drawbar for him.
I too had to order a 36 inch stick of all thread, which was fine but still wasteful, it seemed.

I mentioned it to a certain lady, in the course of conversation, and said, "but I only needed 8 inches."
She answered with a sigh, "Don't we all?"
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Old 05-28-2017, 10:47 AM
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ended up being a simple project, an 11" piece of the 7/16"-20 B-7 hardened all-thread, a 7/16"-20 coupling nut, a couple of 1/8" roll pins and a quick plug weld and it was done.
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Old 05-28-2017, 12:59 PM
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Quote:
Originally Posted by platypus20 View Post
ended up being a simple project, an 11" piece of the 7/16"-20 B-7 hardened all-thread, a 7/16"-20 coupling nut, a couple of 1/8" roll pins and a quick plug weld and it was done.
Is that B7 the same stuff used in gear pullers?
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Old 05-28-2017, 05:58 PM
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With the new mill being....ah..."Fun sized", I kinda figured it would fit nicely
in the van, and would be "on the road" so to speak...

Last edited by digger doug; 05-28-2017 at 06:39 PM.
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