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Posted by DOC on December 5, 2005, 1:43 am
The cheaper ones tend to be more difficult to hack.
Where the more expensive ones have proper bearings, fasteners and
metal gears, the cheap stuff tends to come with NO bearings, plastic gears
and riveted fasteners.
Most of the chuck assemblies I have seen have a left hand threaded screw
inside the
chuck that helps secure the chuck to the shaft. You need to remove this
screw first
before you can unscrew the chuck from the shaft.
I've done a bit of work with some of these and generally pulled them from a
Black & Decker
cordless drills.
In one case I made several changes to the gearbox:
- replaced the shaft with a custom made piece that was better adapted to the
sprocket
I was using.
- reinforced the plastic housing with epoxy.
- turned the housing on a lathe to get it a bit more concentric.
The motors are mostly Johnsons' and they seem to easily tolerate overvoltage
of 50% or more.
DOC
...
> Ditto. I tried taking one apart, and the whole thing is designed to be
> hacker-proof. (This was a Ryobi, I think.) Not only is the case really
> hard to open, but the clutch and chuck all seemed to be inseparable. I
> did manage to pull out the planetary gears, but thats not really useful
> for anything, just kind of fun to look at.
> --
> |\/| /| |2 |<
> mehaase(at)gmail(dot)com
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> motors for robot drive trains ?