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MY1020 Motors - Fitting Pulleys/UK compatable Sprockets


Joined: 31-01-17

Topics: 15

Replies: 21

Posted: Fri 30th Jun 2017, 5:22pm
MY1020 Motors - Fitting Pulleys/UK compatable Sprockets

I'm sure there is a very simple solution to this.

We're buying two MY1020 36V 800W motors to power or new Tug via our new Lifan 6hp diesel engine.

I'm sure there's someone saying "Ah, this old chestnut", in that the MY1020 motors have flat ended shafts which seem to only take sprockets made by the same company. These sprockets apparently don't work to well with UK chains. I've not found any pulleys that will fit either.

Now I know there a several loco's out there running with these motors, so I'm hoping someone might be able to give me some advise as to how to do the following:

V-Belt pulley on engine to the same V-Belt pulley on the MY1020 motor.
A sprocket for the other motor which will mesh with a gear on our axle.

I think its a very similar system to that on Scamp and other loco's based on that design, but I've not discovered how this problem was overcome.

Of course if anyone knows of an alternative make of motor that solves these issues, please let me know.

Any assistance would be greatly appreciated. Thank you

Kind Regards,

Replies To This Post


Joined: 1-01-87

Topics: 3

Replies: 44

Posted: Fri 30th Jun 2017, 7:36pm


There are a range of sprockets and pulleys termed 'Pilot Bore Sprockets / Pulleys' They have a nominal diameter hole bored through the centre for the user to machine to the required size. Unfortunately this will mean that unless specialist equipment is available or a good set of files and a lot of patience it will not be possable to reproduce the 'D' section hole but with only a one horse power motor a suitable sized grub screw should be sufficient for power transfer.
Pilot bore sprockets / pulleys are available in a range of standard roller chain pitches and vee belt or toothed belt sizes.There are thousands on eBay.

Hope this helps.



Joined: 1-01-92

Topics: 28

Replies: 346

Posted: Fri 30th Jun 2017, 11:03pm

Making a "D" section hole, does not require 'specialist machines', though that would certainly make life easier. They can be done on a shaper or even in a lathe, using the same techniques used to produce keyways.

Bob G.


Joined: 1-01-94

Topics: 24

Replies: 198

Posted: Sat 1st Jul 2017, 8:09am

I believe Colin Edmondson has his sprockets laser cut for Scamps etc


Joined: 9-08-09

Topics: 3

Replies: 96

Posted: Sat 1st Jul 2017, 6:43pm

Hi Mike. If you contact Chris Dixon at CMD Engineering he can supply the laser cut pulleys and sprockets as used in the Scamp.


Joined: 31-01-17

Topics: 15

Replies: 21

Posted: Mon 3rd Jul 2017, 9:20am

Thanks for the replies. Sorry, I missed Colin's reply, so had already found a company that could supply and machine the pulleys for me, however I've not sorted the sprocket yet, so I'll give CMD a call. Thanks


Joined: 31-01-17

Topics: 15

Replies: 21

Posted: Tue 4th Jul 2017, 11:26am

We're going to go with a 4QD controller to control everything. A little more expensive, but given this is a commercial loco, we need the safety features etc. However this means regulating the voltage to the second motor, so we are rethinking the arrangement, hence the new thread on Alternators.
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