Building a New Lathe

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BillTodd:

--- Quote from: vtsteam on March 19, 2015, 12:59:58 PM ---Most of us are wasting our time, Bill, and everything moves. Have you actually built and measured a bolted lathe bed of these dimensions and materials, with these size welds, peened and sequenced this way, so you can actually say what will happen? I haven't, and I'm willing to find out, and doing that isn't a waste of my time.

Before you tell me what to do with my time, please mike everyone on this forum's lathes and let me know what you find for an average tolerance. Then let me know when mine will warp past that point so I can switch it off in time.

--- End quote ---

No need to get shifty . it was simple friendly advice :wave:

vtsteam:
Bill, when a guy is deeply involved in a project, the advice that what he's doing is a waste of time will likely not set well.

Let's get past it. :wave:

vtsteam:

RobWilson:
Evening Steve

No sure if you mentioned it earlier ,but will you be adding another length of material to the top of the scraped areas to form the ways ? or do you have some other cunning plan ?

Just looking at the bed , if two flats were added on top of the scrapped flats to form a "T" shape it would be just like my Myford lathe bed .

Keep at it :dremel:

Rob

vtsteam:
Yes, Rob, there are two pieces that go on top of the bed for the actual lathe ways. I've only been scraping their bedding here. The Gingery lathe was built the same way, though it was a single continuous piece on top, full width. The bed is first scraped and then the ways bolted down.

The present bed is through bolted together with 1/2" grade 5 bolts. The square section tube is heavy wall -- .25" and all members were milled and filed square and within one thou of each other in lenghth. There was no daylight when bolted and there is none now. The rails are hot rolled steel. The lathe bed was welded while bolted. The welds are only 1" long, and only located on top and bottom of the tubes, they were sequence welded and peened while cooling similar to cast iron welding practice to perform stress relief. Their function is to keep the cross members from shifting. The bolts and rails are the real structural connections. Both the top and bottom of the 3/4" thick rails of the bed were milled as an assembly prior to scraping.

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