I bought this borer just to part it out and scrap. It weighs 28,500 lbs. However, when I looked at it in person today, with my guy, it was so unbelievably nice, I hate the thought of scrapping it. It has a DRO and retaining nut for spindle collets. So, a thought creeped into my mind, that perhaps I can set it up at my shop and just use it for all manual milling or drilling. The usual shop maintenance and repairs and whatever we do. So, it can do milling, right? i

*Which* jig borer? In general, the bearings in jig borers aren't up to normal milling loads. The mass of those machines is deceptive. They'll do light milling, but that's about it.

Can I use this jig borer as a milling machine?

Mar 11, 2016 22 Replies

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Ed Huntress 10 years ago

If you want to see the original P&W position-setting system (which, IIRC, was also used by SIP), it starts on page 11 of this reprint.

Moore Special Tool used an entirely different system, based on leadscrews lapped to something like 10 microinch accuracy (again, IIRC):

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Ignoramus16966 10 years ago

Thanks, I will read it. I appreciate.

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DoN. Nichols 10 years ago

[ ... ]

Good.

That is the set that I have (upper right hand corner of page

11), except that my set has only two of the longest rods, not four (though there are the slots for the other two). It is awkward to get to at the moment, so I can't verify what machine it was a set for -- but it came with all the rods wrapped in rust-preservative paper. (I got it at a hamfest perhaps twenty years ago or so.)

I still want to set up a V groove for using them in my Clausing lathe. :-) I've used a lathe (a Sheldon, FWIW) which was so fitted.

Thanks for this. I've downloaded it and it is printing as I type.

Enjoy, DoN.

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