Carrier Track Variations

[Jack Geratic]

Lynn much thanks again for providing this information.

Indeed, on page 29 of Colin's thread about his VICKERS MK6B restoration, someone asked specifically if the sprocket was the same as on regular carriers and he responded with a yes. Now just to find a diameter for these.

Will amend my notes about the bogie widths as the values were a bit less from a 20 year old post.

http://www.mapleleafup.net/forums/sh...aussie+pattern

[Lynn Eades]

I can measure a sprocket for you.

[Jack Geratic]

That would be awesome! If you can provide a diameter that includes the teeth and without it would help a lot.

I counted the number of teeth on the newly machined sprocket that Colin created for his Vickers tank. and it too is 35.

20180720_142640.jpg

[Lynn Eades]

Jack. First of all I edited my previous post where I said they mount on 16 bolts. In fact they mount on 18 bolts. (I should have checked first)
Now that I see your sprocket, I dont know what you are after? The new made one looks to be a copy of a std. Australian one. The only difference with a British or Canadian one is the thickness (no shoulders ) The thickness being 19mm (3/4")
It is hard to measure the root diameter because a gap on one side lines up diametrically with a tooth on the other side. The answer would be to swing it in a lathe, but I cant do that. So my estimate would be 474mm. Does that help?

I have a few NOS Australian sprockets, but they are buried and very greasy. Not fun to deal with.

[Jack Geratic]

Hi Lynn, yes just trying to obtain the sprocket diameter in relation to the bogie.

All I can do is guesstimate on a photo, scaled so the bogie diameter is 20 inches. Sprocket diameter including the teeth looks to be about 25 to 25 1/2 inches but must be a bit less than this because the photo is slightly angled such that the sprocket is closer to the camera/viewer.

sprocket bogie VIB.jpg

[Lynn Eades]

Hi again. The overall dia of the sprocket is about 525mm dia. (20 11/16 ish) (max dia.) The bore is probably 16" (406.5mm ish?)

That sprocket (your pic) looks like a later type Canadian one with integral shoulders to carry the track better. (reduce wear) The LP2 / 2a. later had bolt on supports (I've only seen the drawing in a manual) probably similar to the Loyd carrier ones.

What are you trying to achieve? If I knew that, it would make sense to me and what I write might be more useful to you.

[Lynn Eades]

Jack, I was just looking at yor photo post #36. Shouldn't the sprocket sit on a shoulder (spigot?) They are usually a tight fit to stop the sprocket walking on the bolts?
Do you have one of the Vickers Light Tanks?