High-Low gearbox?

[ksafin]

Hi,

All the gearboxes I've seen on Andymark seem to be reduction gearboxes (geared for torque, small to big).

I'm looking for a gearbox that is geared for speed (big to small), or even better, allows you to use any gear ratio.

Do you guys know of some?

Thanks,
3992

[R.C.]

Originally Posted by ksafin

Hi,

All the gearboxes I've seen on Andymark seem to be reduction gearboxes (geared for torque, small to big).

I'm looking for a gearbox that is geared for speed (big to small), or even better, allows you to use any gear ratio.

Do you guys know of some?

Thanks,
3992

I take it your looking to speed up a motor?

I'd recommend looking at AM's website for gears or other sites and cutting your own plates. Are you looking to prototype?

The Modulox looks pretty cool for prototyping - http://www.modulox.com/

Or do you know your final ratio and just want to design a gearbox?

-RC

[ksafin]

Well essentially we'd just like a gearbox where we can choose the gear ratio.

Does modulox accomplish that?

And if so is there anything cheaper?

[R.C.]

Originally Posted by ksafin

Well essentially we'd just like a gearbox where we can choose the gear ratio.

Does modulox accomplish that?

And if so is there anything cheaper?

I guess the better question would be:

-What are you attempting to do?

-Are you prototyping?

-RC

[lemiant]

If it's a muti-stage gearbox you could straight up switch the big and small years, thus inverting that part of the reduction.

[billbo911]

If you have the room and weight allowance to spare, chain and sprockets would work well for this. Attach a larger sprocket to the motor and a smaller sprocket to the driven axis. Just make sure the motor can handle the torque increase applied to it.

[ksafin]

We're trying to gear a motor for speed, but would like the ability to gear it for torque if we see fit with the same item purchased

[billbo911]

Originally Posted by ksafin

We're trying to gear a motor for speed, but would like the ability to gear it for torque if we see fit with the same item purchased

If you take the example I used, just swap the sprockets.

[ksafin]

That still doesn't have as much as an effect as a motor geared for speed though.
The motor would still be geared to be slower, which really isn't what we want.

Yes, what you said will make it faster; but not to the degree we want to reach.

[Aren Siekmeier]

What speeds are we talking about? All of the kit motors that don't already have a gearbox on them have a free speed of 10,000+ rpm (with the exception of the CIM at ~5000). Are you sure you need more than 5000 rpm? And I'm assuming this is not your drive and you're using 4 CIMs in your drive, so in that case, more than 10000rpm?

[ksafin]

Actually we are indeed testing with CIM's.
We want to gear them for speed to prototype a launching mechanism.