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New Diamond Mill Followed Me Home

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markba633csi

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#1
We might need two "Diamond" categories here but here is my new (to me anyhow) Diamond tool company M-20 with a Rotex head added. A lucky find and only two cities over so the only shipping cost was for a Harbor Freight cherrypicker.
Broke it down into pieces and stuffed it into my little truck. All single phase motors so no VFD needed. ;)
Brown and Sharpe #9 taper in the horizontal spindle but the Rotex uses a strange Shaublin-like collet size; fortunately came with a collection of useful sizes from 1/8" to 1/2".
Arbor and overarm support included. I'm jazzed. Do I officially suck now? :D 0911161101-00.jpg 0911161102-00.jpg
Mark S.
 

francist

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#2
Sweeeet!

-frank
 

brino

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#3
Cooool! That looks like a great machine. Solid and stable.

What are your plans, clean up enough to use ASAP or full disassemble, paint and polish?

Whatever you do please put up some more pictures when you get a chance.
What does the base look like?

-brino
 

Uglydog

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#4
Diamand Head?
Rotex?

Please explain.

Thank you!
Daryl
MN
 

markba633csi

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#5
Hi Daryl, I don't know all that much about the Rotex company but the mill is shown on the Lathes.UK website as one of several models built in Los Angeles in the mid forties to mid fifties. Apparently, Walt Disney bought several of these to make parts for his personal backyard railroad which was the inspiration for the larger train that runs the perimeter of Disneyland. Walt told the accounting department the mills were for maintaining film cameras. Yeah, right. Lol
Anyhow, I still don't know what collet system the Rotex uses. It looks like ER20 or 25 but I suspect it's not. It's a light duty head, but the mill is sturdy.
More pix to follow...Not doing a full teardown, just a little cleaning and paint. I want to use this thing before I get too old!
Mark S.
 

brino

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markba633csi

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Hey Brino: Pretty sure the mill is an M-20, not sure on the Rotex, I'll have to look closer. I should have the mill unloaded and re-assembled tomorrow so I'll send more pix. I want to get a couple Brown & Sharpe #9 collets so I can hold endmills horizontally too. Also need to shop for some 1" bore horizontal cutters and slitting saws (bucks). Darn, I wish I had bid on that Ellis head I saw on Ebay, but the seller wouldn't lift a finger and give me enough info to make an informed decision. Why do they do that? Don't they realize they could fetch a higher price if they describe the item better?
Mark S.
 

Uglydog

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#8
Thanks for clarification.
I was somehow trying to figure out how they were vertical diamond wheel grinders.
These may be small. However, that doesn't mean that they cant be perfect for many applications!

Daryl
MN
 

markba633csi

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#9
Got the mill re-stacked yesterday and took a few pics- only real flaw I can see is a chunk missing from the rear spindle pulley that drives the
power feed shaft for the x-axis. Still usable, just looks ugly.
Major cleaning needed- the grease in the knee gears is like modelling clay LOL 1012161000-00.jpg 1012160959-00.jpg 1012161006-00.jpg 1012161002-00.jpg 1012161033-00.jpg 1012161014-00.jpg 1012161023-00.jpg
Mark S.
 

Ulma Doctor

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#10
very cool!
i can see how vital they would be to the maintenance of film cameras! ;)
 

markba633csi

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#11
I'm having fun cleaning it up, also got the motor wires identified and re-mounted it- looks like the drum switch contacts are just about shot from running it on 110; I'm going to run it on 220 from now on :cool: just need to run a dedicated power line...I've got a bad back so things take a little longer these days.
The Rotex head uses a "double taper, Y style" collet size. I was able to pick up a couple more good used ones from Steve at Tools-N-Gizmos.com. Those collets reportedly have good grip force but they lack the collapse range of the ER styles. No problem for me.
I think I'll try a cold repair on that pulley- is there a better epoxy than JB weld? I've had good luck with it in the past.
Mark S.
 

Erichimedes

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#12
This looks great! Please keep us updated with your progress of this little machine! Do you plan to run it with the vertical head, or mostly with the horizontal spindle? Mine came with a Rusnok head, which seems really similar to the Rotex, but I've never used it. I'm sort of curious how well it can take a cut.
 

markba633csi

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#13
Hi Erichimedes- the Rotex took a 1/4" deep cut with a 1/4" endmill in some 6061 before I bought it, I bought some BS-9 collets so I can put endmills in the spindle horizontally too so I'll probably use it those two ways the most. I have the arbor but I don't see using it very much. I might want to try some steel planing but cutters are expensive.
The Rotex is heavy (about 60 lbs) so I won't be taking it on/off very often :)
Mark S.
 

Erichimedes

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#14
Very cool Mark. Mine came with the ram, but didn't come with the overarm support or an arbor. I think I'll probably make one someday, but if for no other reason than just to have it. It's also missing the table power feed driveshaft, so if you see one, send it my way. I'd love to outfit it as it was when sold.
 

markba633csi

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#15
It's kind of a machine desert here, however I have heard there's quite a few Diamond owners in southern California. Apparently there's not a whole lot of information about Diamond tool or the machines themselves- no manuals or parts lists. I wish I knew how many of each model were produced, and where all their spare parts ended up.
Mark S.
 
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