Track Pins

Philliphastings · #1 05-01-12, 06:34

Still looking for correct pins to fit to my museum only restoration...

Thanks

Phill

Jon Bradshaw · #2 06-02-13, 06:48

So I have a T16, and the previous owner removed (cut) all the track pins out and I got a pile of links.

I was wondering if there was anything special about the pins construction? Are they made out of mild steel or more unlikely tempered/ hardened steel. As I said I have none so now need to make about 360 of them. Any suggestions on sourcing data on length, thickness and grade of steel would be appreciated. I have a few from a universal but they are in terribly worn shape. This makes me think they are probably made the same, simple mild steel?

RichardT10829 · #3 06-02-13, 11:00

Pins are chromoly steel I think, if you do a search there has been discussions about them,,,, don't be tempted to use stainless.

Stew Robertson · #4 12-02-13, 14:47

The pins are a hardened tool steel pin at 52 RC if you want to tighten up your old worn track, ream the track holes to 12m.m. and have new pins made to 12 m.m. ? Brand new Track! and no hassel of looking for track

RichardT10829 · #5 12-02-13, 19:49

Will that not considerably weaken the lugs nthe links ?

Marc van Aalderen · #6 12-02-13, 20:56

Quote:

Originally Posted by Stew Robertson

The pins are a hardened tool steel pin at 52 RC if you want to tighten up your old worn track, ream the track holes to 10 m.m. and have new pins made to 10 m.m. ? Brand new Track! and no hassel of looking for track

Stew, due to the warp steering there must be play on the pins and track links. Otherwise the tracks can't bend. Track pin analysis included.

Analyse Carrier Track Pin.jpg

Cheers,

kevin powles · #7 12-02-13, 21:39

Quote:

Originally Posted by Stew Robertson

The pins are a hardened tool steel pin at 52 RC if you want to tighten up your old worn track, ream the track holes to 10 m.m. and have new pins made to 10 m.m. ? Brand new Track! and no hassel of looking for track

Stew, Carrier track pins are 7/16" 11.1125mm. I dont have any specifications on hole clearance dimensions.

kevin.

Rob Beale · #8 14-02-13, 12:53

I have made a few using 4140 steel shaft.

(Manawatu boys told me this years ago).

I knocked a pair of these pins out at the Wairarapa Airshow last month to adjust the brakes. They were fitted probably 10 years ago, and have worked fine to date.
Note these are for a LP2, so are plain shaft with lead plug retainers.
Rivetted pins will need heads welded on as described above.

Another long time carrier owner from the Manawatu told me of trying to ream out track to 12 mm diameter, and how hard the links were.
Maybe just fitting new pins will make an old track serviceable?
I have seen pins worn with a stepped shape, so new pins will take up a lot of slack when multiplied by 168 (or 176 on an LP2)

Rob

Stew Robertson · #9 14-02-13, 15:16

Sorry wrong mm should have been 12 MM
the difference is only.035 in which will not weaken the track and will still steer that is on .016 thou per side which is 2 red hairs Not big deal
the tracks are probably worn that much or more and you will have sufficent clearance for steering
The track will still warp with a few thou clearance

The Bedford Boys · #10 15-02-13, 04:41

Quote:

Originally Posted by Rob Beale

I have made a few using 4140 steel shaft.

(Manawatu boys told me this years ago).

I knocked a pair of these pins out at the Wairarapa Airshow last month to adjust the brakes. They were fitted probably 10 years ago, and have worked fine to date.
Note these are for a LP2, so are plain shaft with lead plug retainers.
Rivetted pins will need heads welded on as described above.

Another long time carrier owner from the Manawatu told me of trying to ream out track to 12 mm diameter, and how hard the links were.
Maybe just fitting new pins will make an old track serviceable?
I have seen pins worn with a stepped shape, so new pins will take up a lot of slack when multiplied by 168 (or 176 on an LP2)

Rob

You can also just heat the end of the pin and peen it to form the 'rivet' style head. Just don't quench it or it'll go brittle and the 'head' pops off when in use. If you want to fit oversize pins, you'll go through a few drills due to the make up of the track links, but it can be done. Bloke from around here has done it successfully.