Scooter motor sprockets

[Ed Deegan]

Hi all,

Looking at buying a couple of my1020 scooter motors for a heavyweight drive but will probably need to change the sprockets on the motors. As far as I can see it seems pretty straightforward. Hex nut and a lock washer. Am I right in thinking its a simple case of undoing the the nut and changeing the sprocket or is there more to it? Don't want shell out for them and find I can't change the sprocket.

Also any veiws on these motors in genral much would be much appreciated. Its the 24v 800w variety.

Thanks guys.

[maddox10]

It's a D-shaft, and yes, it's that simple.

The MY1020 ain't bad motors, but can use some spit and polish. Better magnet retaining and beter wires come to mind.

[RogueTwoRobots]

Depending on what size of sprockets you plan on using, there's not much of a shaft left when you take the nut and original sprocket off. What I did was to take the sprocket off, put the nut back on (spot of weld too) and run the motor while taking an angle grinder to it to smooth it down and round it off. If you get it right, it leaves a ~12mm diameter. This left me with more shaft to pin my sprockets to. They've been great motors, just needed a bit of epoxy on the magnets, much better performing than Bosch 750s from my experience.

[Ed Deegan]

Thanks guys. Much appreciated. Been waiting for the 24v 800w type to turn up for ages. Looks like we can finally get our robot moving!

http://www.ebay.co.uk/itm/800W-Elect...AAAOSwWxNYtZt0

[Bodge Job]

Mine came with a reverse thread nut, might not all be like that, but keep it in mind. Spent ages trying to get the nut off before I realised!

[Ed Deegan]

Got my sprockets mounted to the motors without to much fuss. Thanks guys.

Jamie mentioned using a spot of weld to secure the sprockets. I don't have access to any weld gear but was thinking of using araldite or plain old super glue. They are just held on with the reverse nuts at the moment.

Also would you mind explaining in more detail how to put the epoxy on the magnets?

[emisnug]

Jamie mentioned using a spot of weld to secure the sprockets. I don't have access to any weld gear but was thinking of using araldite or plain old super glue. They are just held on with the reverse nuts at the moment.

If they're held on with threads, throw some red loctite on there.

Loctite-Threadlocker-Red-271.htm

You might need a series of strong people (and a blowtorch) to get it off again though.

[maddox10]

Last time I epoxy'd magnets I did make up a batch of epoxy, dabbed it in between the magnets and had the motor spin around in the lathe untiel the glue was hardened.