Any info on these motors?

[throbscottle]

I've been looking at pcb drill bits on eBay and found these motors:
**broken link removed**
a different one:
**broken link removed**

Another listing states the motor goes up to 29326 rpm:
**broken link removed**

The grey one looks slightly better as it has a metal back plate. If they're any good I can build a tolerable press drill with one.

Seeing as both my very cheap red no-name hobby shop mini drill and slightly better Parkside mini drill have just enough play to be not very good pcb drills, I wondered about getting one of these to build a pcb press drill. Does anyone have experience with these particular motors?

 

[Joe G]

some of the craft shops have a small rechargable/hand held drill I was thinking of getting a few years ago. I used a pin vise/exato handle for a while untill I finished my home-brewed drill press.
I made it from a automotive window washer pump motor and scrap parts, It works great down to 5 volts.

 

[throbscottle]

How did you couple the chuck to the motor? I've been failing to build a big home brew press drill for the last 2 years and this was my first stumbling block. I ended up making a flexible coupling, but that wouldn't really work for a pcb drill.

Cheers

 

[alec_t]

Whatever you get, make sure it can take end thrust on its shaft. Ideally it would have a proper thrust bearing.

 

[Joe G]

I drilled a pc of threaded rod for the shaft to thread into the chuck, I went through alot of chucks I tood off of cordless drills to find one w/ "very little" runout. I coupled the motor to shaft w/ O ring which is supported by 4 bearing. the "ways" are printer shafts.

 

[throbscottle]

Oh I see. Nice piece of work

 

[throbscottle]

I have a few motors out of old printers. Gonna have a play with em.

 

[Joe G]

thx. It's about 8" high, amazing what can be made if you have a need and a good supply of junk and really cheep I had a stepper drive for the feed but I like the "feel" when drilling w/ small bits.

 

[Joe G]

sorry, I never mentioned the motors. They appear to be just like the motors out of a printer, some use alot of amperage and really spin fast.

 

[Mr RB]

Do you have any better photos (clearer and smaller in filesize) JoeG?

 

[Joe G]

Mr RB, give me a few minutes, my son has to show me how again. I'm a-little computer illiterate, lol

 

[Joe G]

Hope this size is better?

high power white led is on round pcb by chuck, a momentary switch on up/down lever, on/off switch on back plate, quill stop on lower black handle.

 

[Mr RB]

Great photos JoeG thank you!

That is a pretty serious looking PCB drill.

Mine has a siliar sized electric motor, but with the pin chuck on the end of the motor shaft. Yours looks to have a 1:3 reduction gearing? I know that allows some larger drill sizes, but is it still fast enough for the fine PCB drills ie 0.8mm?

 

[Joe G]

thanks, the motor really spins fast, I've used it w/ drills of .010" so far. at 12v it really goes to fast. Its also a 2 groove pully, smaller groove is on underside. the quill feed was neat but was just overkill

 

[throbscottle]

Threw this together today!

Not up to Joe G's standard, but I banged it together out of some wood from an old cot, a bit of old shop shelf, a rod from an old bird cage stand, some metal from the casing of an extinct tumble drier, 2 springs from some speed clamps that didn't clamp, and a very small bit of aluminium tube. The motor came from an old printer - I was surprised how many I have. I had to pick a small one because the chuck on order from eBay fits a 2.3mm shaft. I have to wait for it to arrive from China

Amazingly, the motor seems quite straight.

 

[Mr RB]

That's a simple and ingenious design Throbscottle.

I might take a photo of my mini DC drill press and post it later. Actually, it would be nice to see everyone's drill presses.

 

[alec_t]

@Throbscottle
Ah, a man after my own heart . Apart from something beginning with S and ending with X there's nothing more satisfying than re-purposing what others regard as junk and getting a useful end product. It's also doing a bit to save the planet.

 

[throbscottle]

I took photo's as I went, so when it's finished I'll publish an Instructable

 

[Joe G]

Nice job using odds and ends, my first one was also made of wood, and chg'd as req'd. till I went overboard It also would be nice to see other's use of items.

 

[throbscottle]

Collet chucks arrived today. Nice little things, fit the shaft very well, run nice and straight. Ran the motor on 24v to get a good speed up.