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Mark V Lathe Extension

Posted: Sun Oct 11, 2015 1:49 pm
by redleg
67 1/2 inches center to center using shorty tubes (34")
67 1/2 inches center to center using shorty tubes (34")
IMG_20151011_110750 (768x1024).jpg (530.73 KiB) Viewed 2211 times
Yesterday I was going to replace the long tubes on a Mark V that I have for sale on the Greensboro Craigslist with short ones. I welded two 18" tubes together for the bench tubes and wanted to clean them up. My shorty and regular Mark V that I have strapped together for long tubes is at my other shop. So I decided I needed an extension for my 520. Still have to get some decent hardware to put it together with but here's the usable prototype.
67 1/2 inches center to center using shorty tubes (34")
67 1/2 inches center to center using shorty tubes (34")
IMG_20151011_110750 (768x1024).jpg (530.73 KiB) Viewed 2211 times
The offset posts and flat steel will be replaced with angle iron and round steel pipe
The offset posts and flat steel will be replaced with angle iron and round steel pipe
IMG_20151011_110816 (768x1024).jpg (505.03 KiB) Viewed 2211 times
IMG_20151011_110840 (768x1024).jpg
IMG_20151011_110840 (768x1024).jpg (504.84 KiB) Viewed 2211 times
Don't have an extra leg at the moment.
Don't have an extra leg at the moment.
IMG_20151011_111002 (768x1024).jpg (617.15 KiB) Viewed 2211 times
Has anyone found a steel pipe or rod that matches the lathe end support holes without machining?

Re: Mark V Lathe Extension

Posted: Sun Oct 11, 2015 1:59 pm
by beeg
So how are you going to HEAVILY WEIGHT the tail stock end?

Re: Mark V Lathe Extension

Posted: Sun Oct 11, 2015 2:04 pm
by JPG
redleg wrote:
IMG_20151011_110750 (768x1024).jpg
Yesterday I was going to replace the long tubes on a Mark V that I have for sale on the Greensboro Craigslist with short ones. I welded two 18" tubes together for the bench tubes and wanted to clean them up. My shorty and regular Mark V that I have strapped together for long tubes is at my other shop. So I decided I needed an extension for my 520. Still have to get some decent hardware to put it together with but here's the usable prototype.
IMG_20151011_110750 (768x1024).jpg
IMG_20151011_110816 (768x1024).jpg
IMG_20151011_110840 (768x1024).jpg
IMG_20151011_111002 (768x1024).jpg
Has anyone found a steel pipe or rod that matches the lathe end support holes without machining?


If the 1 3/4" holes, 1 1/2" EMT.

Interesting!!!!!

Are the SPT tubes irrelevant in your pix, or do they actually do something?

Re: Mark V Lathe Extension

Posted: Sun Oct 11, 2015 2:18 pm
by redleg
For sanding the way tubes weight was irrelevant. I am open for suggestions if it may be needed for heavier items.

The SPT tubes are the support for the flat bar which with the bolt pulls the tie bar toward the headstock.

Re: Mark V Lathe Extension

Posted: Sun Oct 11, 2015 2:36 pm
by redleg
I measured the lathe tailstock holes to be 1.23". One inch ID galvanized steel pipe was too large.