Worth fixing ?

[whitmore]

Not sure where I can find a 30k motor that is 4" in length max....

Well, there's this one (you'd want an adjustable DC supply, for speed control)
(lawnmower item from China)
which could work... the length is about 3 inches. Pulleys can raise the speed a bit.

 

[MikeInOr]

A motor off of a router would be small enough and fast enough. Routers spin over 20k. Some trim routers get up to 30K. Getting a small fast motor is not a problem. Make whatever you need to mount it. Same goes for the chuck. Bet it has a standard taper. I doubt that they make the chucks. Too specialized for a small manufacturer.

Is it worth the time and effort? Only if you think that it would be a fun project to restore.

A motor off of a router would be small enough and fast enough. Routers spin over 20k. Some trim routers get up to 30K. Getting a small fast motor is not a problem. Make whatever you need to mount it. Same goes for the chuck. Bet it has a standard taper. I doubt that they make the chucks. Too specialized for a small manufacturer.

I would also suggest looking at CNC router spindles with VFD's on ebay, Amazon etc. They MIGHT be a little more compact and a little easier to work with.

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2.2KW Spindle Motor ER20 HY Water-Cooled VFD Inverter+Collet+Bracket CNC Router 630282933217 | eBay

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