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labrat-78 — Timken AP Class F

Published: 2008-10-08 02:06:57 +0000 UTC; Views: 669; Favourites: 18; Downloads: 0
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Description The standard Roller Bearing in America, the 6 1/2 by 12 inch tapered roller bearing.

In this case, made by Timken.

Heavy haul at it's best
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Comments: 16

RailroadNutjob [2011-11-01 16:14:42 +0000 UTC]

Timken?

Timken still used today?
DAH, YES.

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shenanigan87 [2008-10-10 13:08:41 +0000 UTC]

Very interesting... I wonder when friction bearings were used around here for the last time, I don't really know anything about this. But this shot, and the one by almost made me shoot an entire bogie of a double decker cab car, not only to show off the bearings, but the pneumatic suspension and cab signalling magnet

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labrat-78 In reply to shenanigan87 [2008-10-10 13:18:48 +0000 UTC]

Go for it. I could use the education.

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Morris88 [2008-10-08 03:28:08 +0000 UTC]

Excuse my ignorance, but what do the dimensions mean? Is it perhaps 12" diameter, and 6-1/2" wide, along the axle axis? What is tapered? I'm curious!

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labrat-78 In reply to Morris88 [2008-10-08 12:32:42 +0000 UTC]

Tapered means that the bearing "needles" inside, which are long round cylinders of hard steel are tapered, one end is smaller than the other. They use this method instead of balls for the bearing parts.

The measurements are just that, but on the inside. The three bolts you see actually are all that holds the bearing onto the axle. For a car that will carry more weight the measurements are usually 7 X 12

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Morris88 In reply to labrat-78 [2008-10-08 14:21:18 +0000 UTC]

Oh! I had no idea! Thank you Traci for the explanation

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labrat-78 In reply to Morris88 [2008-10-09 02:01:27 +0000 UTC]

No problems. You got questions, if I don't have an answer I'll either find one or just make one up

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Morris88 In reply to labrat-78 [2008-10-09 02:20:47 +0000 UTC]

Traci, you and I will get along just fine. I feel the same way about the things I love

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labrat-78 In reply to Morris88 [2008-10-09 12:21:47 +0000 UTC]

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sockrotter [2008-10-08 02:30:46 +0000 UTC]

Nice shot Traci; what's the life expectancy on these bearings?

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labrat-78 In reply to sockrotter [2008-10-08 03:20:16 +0000 UTC]

good question. I have seen some on cars that look like they have been on there for a while but in reality its hard to really tell. Once they are found to be defective, usually by the backing ring getting loose (carmen find this regularly on inspections) they get changed out, the whole wheelset.

Then the old bearings are sent off to be torn down and completely rebuilt

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classictrains [2008-10-08 02:20:14 +0000 UTC]

when was the last time you saw a friction bearing?

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labrat-78 In reply to classictrains [2008-10-08 03:20:36 +0000 UTC]

about 25 years ago.

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classictrains In reply to labrat-78 [2008-10-08 16:18:08 +0000 UTC]

The WP&Y still has them.

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labrat-78 In reply to classictrains [2008-10-09 02:00:38 +0000 UTC]

I bet they don't put much load on them, do they?

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classictrains In reply to labrat-78 [2008-10-09 21:00:18 +0000 UTC]

The WP&Y doesn't but in the good old days (LOL) they were on everything! [link]

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