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Hunting for cheap drill motors
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Tim



Joined: 30 Oct 2013
Posts: 247
Location: QLD


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Pic's of the internals please kind Sir (when you have time) , are they 4 screw boxes like the rockwells?

Post Tue Oct 07, 2014 9:04 pm 
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Glen
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Ere goes.

They look a fair bit different now. The clutch locking holes are WAY bigger. maybe m6? There isnt much meat on the outside. Should be okay though.





The motor mounting plate is also very different. The ring gear sits halfway outside the shortened gearbox case and the motor plate goes over the other half to keep them inline. That is a very good change as most of my old drills would need new cases once the locating pin wore off and the screw holes flogged out a bit.



Mounting the lot may be a little more tricky because the back of the gearbox wont butt up to the motor mount with that odd shaped attachment.

Can't recall what size shaft the motors use but it might be smaller. Has a flat ont he shaft and gear. Could be really handy for swapping motors.



Metal gears first and last stage. Seems pretty good to me Smile
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Post Tue Oct 07, 2014 9:44 pm 
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Cpnwolfe



Joined: 29 May 2012
Posts: 454
Location: Rockhampton/qld


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those are the same ones as I ran during the weekend and only had one fail after demon munched on it Rolling Eyes I mounted them with printed mounts with one big circle and clemped em down tight with strips of aluminium and didnt have any slippage

Post Tue Oct 07, 2014 10:16 pm 
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miles&Jules
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ye don't go past 4s with k mart 18v drills….6s melts em for sure Shocked
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Post Wed Oct 08, 2014 2:55 pm 
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Thomas AIC



Joined: 22 Jun 2009
Posts: 151
Location: Canberra


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Is that 18v kmart Glen? The 12v ones I've bought have the old-style gearbox (same as that in the drill hacking tutorial) and work perfectly with the same 3D printed mount.

Post Thu Oct 09, 2014 7:10 am 
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Ondray



Joined: 06 Jul 2015
Posts: 142
Location: Newcastle


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I almost bought the 12V drills from kmart yesterday, I'm glad I read this first.

I'm going to try the hobby shop here in Newcastle and price some RC car motors (I'm going to get the transmitter from there anyway)

Post Tue Jul 07, 2015 1:31 pm 
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marto
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Prog was selling a bunch of Ozito gearboxes for $5-10 in the marketplace section.

Also Hobbyking. That is all.

Don't even bother with local hobby shop. 6 Channel hobbyking radio is $25 you will need the 6ch not 4ch and a programming cable $3. Think most of us use them.

Steve
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Post Tue Jul 07, 2015 1:36 pm 
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Ondray



Joined: 06 Jul 2015
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Location: Newcastle


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Local place does a 6ch kit with receiver and a couple of servos for $60, and i get to pat myself on the back for shopping local.

Post Tue Jul 07, 2015 1:42 pm 
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marto
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As long as its 2.4Ghz should be fine.
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Post Tue Jul 07, 2015 2:02 pm 
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Ondray



Joined: 06 Jul 2015
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Location: Newcastle


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I had another look, it's a 29Mhz crystal setup, and I read elsewhere on these forums that crystals are bad juju. So maybe hobby king will happen.

And to keep it on topic, I'll be getting some of those cheap ozito drill motors.

Post Tue Jul 07, 2015 2:31 pm 
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marto
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FM 29Mhz... yeh just don't.

Unless you want your robot to just sit in the arena and not do anything.
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Post Tue Jul 07, 2015 2:32 pm 
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marto
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Yes.. on topic. Next best source is recycled ones.
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Post Tue Jul 07, 2015 2:32 pm 
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Ondray



Joined: 06 Jul 2015
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Location: Newcastle


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So for those Ozito 12V motors, what would be the recommended ESC to control them? Would the 30A one of Botbitz be enough?

Post Sun Jul 12, 2015 9:42 pm 
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marto
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30As will run them but for longevity I would suggest going a 85A.

It will cost you a bit more upfront but when you want to run 4 drills, Dewalts, 300W scooter motors or something big in the future it will be much happier doing it than the 30A.

Steve
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Post Sun Jul 12, 2015 9:49 pm 
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Ondray



Joined: 06 Jul 2015
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Location: Newcastle


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Here's another option, kmart quality again - 12V air compressor I got today for $10 (said $12 on shelf then scanned for $10).

Looks to be the exact same motor as the kmart 12V drills, but simpler gearing, I don't think pulling the piston off will be too hard.



Bit useless for actually pumping up tires, real slow. But all the more reason to pull it apart.

Post Mon Jul 13, 2015 7:56 pm 
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