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Unimat SL Micro Lathe 5 years 6 months ago #32828

waterbok wrote: my hobby room is only 4x3 mtr, but I still cant find my protective glasses :pinch: :cry:

A buddy of mine has that exact machine u just bought. Still looks new after 44 years.



galaxy note edge hülle

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Last edit: by Friedel.

Unimat SL Micro Lathe 5 years 3 months ago #33974

Some new tools to add to the Unimat,



original 20mm block to get it a bit higher, might create enough room for a ball turning tool.



and an indexing thingie

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Unimat SL Micro Lathe 5 years 1 month ago #34503

waterbok wrote: Some new tools to add to the Unimat,
...
original 20mm block to get it a bit higher...


Have you tried using the 20mm riser yet? I have one on the way & have been wondering how to give the toolpost & tailstock a corresponding lift :huh:

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Re:Unimat SL Micro Lathe 5 years 1 month ago #34504

Not yet, to busy with karaoke and sake. ;-) I had my eye on the circular saw but missed out on a good deal.

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Last edit: by waterbok.

Unimat SL Micro Lathe 5 years 1 month ago #34559

The riser arrived so I used a suitable chunk of aluminium to give the toolpost a matching lift (a 4-jaw independent chuck is the most useful upgrade you can have IMO) ... 62mm Bush Devil wheel could be spun without the risers, but you couldn't get the carriage underneath & could only tickle the faces.

You could possibly get something up to 74mm in now, but only with only the tiniest bit of a tool showing in the holder.

Overall I think a riser will make the Unimat a bit more useable, but without really increasing capacity that much - you can't do anything to move the toolpost further away from the work, so that & the small chuck having a limited grip restrict capacity.








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Unimat SL Micro Lathe 5 years 1 month ago #34560

Couldn't you make an offset block that extends further back to move the tool holder back?

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Unimat SL Micro Lathe 5 years 1 month ago #34562

Martin Bell wrote: Couldn't you make an offset block that extends further back to move the tool holder back?


TBH I don't think it would help - things are so tight the top slide of the carriage would get in the way even if you could step the toolpost back a bit.

:)

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Unimat SL Micro Lathe 3 years 7 months ago #41726

The motor has given up after a mere 40+ years, I suspect the insulation on one or more of the field coils is failing :(

This is hardly a complete guide, but it does at least give suggestions & have pictures - motor is a Chinese 24v DC scooter motor rated at 120W, along with a suitable PSU & speed control.



The motor has three mount holes but only one a time lines up with the Unimat bracket, and it's fitted (hopefully not too well) with a small pinion for a toothed belt. I needed to make a new pulley, so the motor is currently hanging on by one screw & the drive belt running on masking tape over the belt (which got burned off the first time I stalled the chuck).

This is as far as I've got, two of the wires on the speed control have failed so need resoldering, then the new pulley needs drilling & tapping for a grub screw, and the motor needs the existing pinion removing & the faceplate removing, drilling & tapping for another screw mount. I may not make a "proper" three step pulley for the new motor as I tended to only run the lathe at 1600rpm (middle step on motor pulley to middle step on machine pulley) anyway.


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Unimat SL Micro Lathe 3 years 6 months ago #41844

I did finish this - the unwanted pinion came off the new motor witth the aid of a 2-legged hub puller & a bit of angle iron with a notch filed out, the motor then had to come apart to drill/tap an extra mounting hole. It looks quite tidy fitted.

The separate PSU means it's no longer as compact as before, but I've fitted the speed control into a styrene sheet box stuck to the PSU, in practice it means I can plop the combined unit some way off to the right of the lathe in use, then unplug it for easier tidying away :)





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Unimat SL Micro Lathe 3 years 6 months ago #41850

Ace :y: was planning in the same direction to save the old motor.
Do you still have to take a break for cooling or can it run longer?

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