Postwar Lionel turbine axle bearings

contact the "man".

Jeff Kane at ttender.com.

He has all the parts and all the answers. he will know!!

Does the 671-248 have a lip? I thought it was  plain bearing. The 681-11 has the lip to retain the metal sideplate used to transfer magnetic flux from the magnet to the wheels.

I ask Jeff enough questions. I thought someone on the board might know.

OK, the 671-20 is the flangeless bearing. the 671-248 bearing was used on the late 1952 re-run. It is used in conjunction with the 671-244 and 249 axles only. I would say the difference between the 671-248 and 681-24 is the thickness of the flange to compensate for the metal plate not used on the 671RR.

Thanks!
Some of the 681-11 bearing that are on-hand have very thin lips, others have thicker lips, just like the 671-248 bearing. I picked these up a long time ago. I guess that the ones with the thick lips are probably really 671-248 bearings.

I dug out a 681 chassis that was in my parts box and removed a bearing. Sure enough, just a Chuck Sartor said, the lip of the axle bearing was OVER the metal side plate

I never looked that closely before, and I never thought about what held those side plates in place.

Thanks again!

CW, since you and Chuck are talking postwar bearings, I'm going to highjack your thread a little.

The postwar #41 switcher had the motor brush-plate changed after 1955, but the Lionel Service Manual (11-58) also mentions an axle bushing and wheel spacing change. What was the difference?

Dave

The axle bearing was changed from a simple sleeve without a shoulder to a shouldered bearing on the geared side only.

As far as I know, the spacing (gauging) of the wheels did not change.

They eliminated the use of the 671-239 stud that was pressed into the wheel for the side rods. Lionel called this part a "side rod spacer". When they made this change, they had to change the side rods by altering the size of the holes, and the side rod screws.

Thanks for the info.

Their change makes sense now. When pushed toward center, the opposite side has about .020" between the wheel and frame, whereas the geared side will pinch the idler.

They show a 41-13 Axle Bearing, and a 41-74 Drive Wheel Bearing. Is the 41-74 the later, flanged one?

I was aware of the side-rod changes, they were also mentioned in the manual.

Dave

I played around with my 681 chassis some more.
The 671-248 bearings fit into the 681 chassis, but since the lip is slightly thicker than the proper 681 bearings, the wheels cannot be gauged as original. (I thought there might be enough side to side play to allow it).