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Thank's Pat for these details , i will check it all -- Lio, France - Unimat SL x 3

Just a heads up to those that open up their u90 motors. The only time I have had one pop a line circuit breaker was a short in one of the leads caused by rubbing against the rotor. I posted on the

I'm another who uses their machines (an SL and a U3) to make model railway stuff. Typically chimneys and parts for 009 (OO/4mm scale narrow gauge using 9mm gauge track), I have turned my own wheels.

Forgot to add, the screws are M4x25mm, according to DIN 963 (flat head, 90° countersunk, slotted). Roman

My 4-jaw chuck has a back plate with 4 holes, bolt pitch circle diameter is 26mm. My 3-jaw chuck has a back plate with 3 holes, bolt pitch circle diameter is 23mm. Screws are M4 Roman

Hello Lio: I use my drafts person's electric eraser to clean commutators. I use the gray eraser meant for removing ink. Notice the grind marks from dynamic balancing. A better quality motor. Carl.

Thank you very much to all ! -- Lio, France - Unimat SL x 3

-- Lio, France - Unimat SL x 3

Something missing ?

1 : Remember to mark the different parts to facilitate the reassembly : 2? : Since it's open : check the bearing : 3 : the hole where the small screw is placed which holds both the small red wire

Hi Pat: As a tool maker we used special center punches called Transfer Punches: https://www.harborfreight.com/search?q=transfer%20punch%20set Very handy, never hit them hard, just enough to leave a

I would like photos please. Regards, John Hutnick

Hi My U90 motor is currently open : if you want photos : ask ! -- Lio, France - Unimat SL x 3

So here is how I would do the finish and holes, thread the center with the proper relief. ?Thread it on the spindle, face it square and to fit the chuck recess. ? Put it in the recess then Using a

When I restored mine late last year I had to do a lot to the motors internals to bring it back to spec... The screw on top of the case at the rear is what I’m on about, inside there is a bit of

Hi, I make fountain pens with mine. Was told it'd be too small but you can just about get it to work with some extra thought. I was forever having issues with the run out though, and since I believe

Hi Aron, The only bolt I have is the cable guide, where it enters the case. I guess I can loop it around there too. I'm wondering if the one you're talking about got cut away when the previous owner

I can measure tonight.

What about making the backplate fit the chuck snugly and then use a transfer punch through the hole in the chuck.? Your screw holes are now marked.? Drill and tap for M4 screws Ed

Doesn't anyone known the bolt circle diameter or is it in some file?