new carrier track pins

[Jim Burrill]

Richard... would it make sense to join forces to get a shit-load of them made up?

I wish I could have all the pins reened at both ends, but can live with the washers and split pins on the inside and not really visable.

Sounds like adding a washer and welding the washer on may make it harder to knock one out for shortening a link or fixing a break in the field.

I am thinking all the longer ones with the hole drilled.

I would be up for 300.

I have a good machine shop nearby, but have not run this project by them. I am wary that their solution would be expensive....

Jim

[maple_leaf_eh]

Molasses rust removal - suggest you inspect the pins before leaving them immerse too long. I had an experiment going which was full strength molasses, and the acids removed visible portions of the surface. The tell-tale was a black slurry in the bottom of the container.

[Perry Kitson]

A number of years ago I had one of my new pins tested for composition, with the results posted here (can't find the post). I will look through my notes to see if I can find it. One option for worn track is to use 12mm dia. material (.472") to replace the 7/16 dia. (.437") of the original pins, giving new life to old, worn track. As Bruce says, the hole wear into an oval shape, so you would have to make sure that the holes were large enough to accept .035" larger pins. The pins were case hardened to 55-56 RC.(that's 560 to 575 Brinell for you non colonial types).
Just found my post!
This may help. I found some info from when I was researching reproducing track pins. The following is the result from composition testing on the Canadian track pins.

Ni 2.31%
Mn 1.53%
Cr .31%
Fe 95.06%
Perry

[Michael R.]

Prior analysis by Marc v.A. and Stephen D.

[Marc van Aalderen]

Originally Posted by Jim Burrill

I wish I could have all the pins reened at both ends, but can live with the washers and split pins on the inside and not really visable.

Jim

Jim,

Never put split pins on the inside of the track! If one breaks you will not notice until the track pin goes awol and your track falls apart! For this reason you ONLY put the split pins on the outside so the sound on your hull will alarm you there is a track pin on the loose.

Cheers,