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?
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.
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.
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.
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.
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?
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
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
@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.
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.