track drive sprockets

[Richard Salter]

Hi, no they are not hook but I wondered about the space between the teeth seems deeper/wider but not hooked, and no I don't have a spare one to compare.
Thanks

[Tom Millward]

It might help to post a picture, if you have one, to see where the wear is taking place (both the track and the drive sprocket).

[Lynn Eades]

I cant remember for sure but I think the test is done with a section of 1 7/16" dia. round bar. If it hits the bottom (between the teeth) then your sprocket is worn out. Count the track links on each side and tell us what you have? I have edited to the correct bar dia.

[kevin powles]

Richard, If you post a picture of your problem, I might have some spare usable sprockets here.

[RichardT10829]

There are NOS sprockets out there, Kev had a number of very tasty ones for sale not so long ago. I have the metallurgy / hardness data and CAD for sprockets but as there is still (to some extent) a supply of original items, I haven’t furthered that project.

Are the loyd rings the same as universal ? Alistair you may want to chime in here.


Kev, from what I understand, Richard’s track horns are striking the hub bells as they pass over the sprocket, the issue is suggestive that his sprockets are worn… I know the clearances are tight’ish, Lynn has mentioned the round bar test (which I hadn’t heard of until just now) I know on universals the clearance between the horns and the hub bell are a lot closer than that.

Did you sell off all those Gucci rings you had a while back ?

[Andrew Rowe]

Loyd sprockets are all the same as British and Canadian. I have had Loyd brake hubs that have had indentations worn into them by the track. I suspect normally caused by worn track rather than sprockets, but the two go hand in hand to achieve the correct tolerances. I still have a few NOS Aus/NZ bren sprockets That are pretty much identical left in the store from over 200 I had a one stage. Just waiting on the next boat heading your way! , Cheers Andrew.

[Richard Salter]

Hi guys I have taken a photo but can't upload at moment but not sure of technical terms are but as the links go round the sprockets the link ends are hitting the brake drums and the horns have worn a groove down the side part of the drum side there is a ridge in the middle of the drum which has worn down. so im thinking the gap in between the teeth has worn down so much that the links are now hitting the drums, if any one has a set of four NOS sprockets I would be interested in purchasing them. If id did put new sprockets on would I have to replace the Track as well?

Thank you for you help

[Lynn Eades]

Richie H. the round bar is listed in the tool section of a Loyd manual. Check with Ben H.
Richard S. are you running the track guides that bolt on with the sprockets? The number of track links you are running will tell you how knackered your track is. I think you can run new sprockets with worn track, but the wear rate will climb. I'm not sure, I haven't done it. I spoke to a guy who worked carriers hard for a living. He told me they would wear out 3 sets of sprockets to one set of track. Maybe some who knows better will hop in here?