NWSL used to make all of the different type bearings that AM came up with. Round, square and half round are the ones that I remember, there may be others? You might check with them.
Roger Nulton From: wsquinn Sent: Tuesday, March 19, 2013 7:25 AM To: [email protected] Subject: {S-Scale List} Re: U-joint vs. Springs..... Group, Thanks to all who replied to help me out with this. Since all five AM GP locomotives showed the same symptoms (unsteady at low speed) I suspected they all had the same problem. If I had paid more attention to the differences among the units in the first place I wouldn't have made that mistake. With everything disconnected it's obvious that the one group (two units) with U-joint drive couplings should have their motors replaced, and the other group, the one with the better motors, should have their pen spring drive couplings replaced. For now I'm just going to mate the U-joint drives to the better motors to see what happens. It shouldn't be necessary to take the added step of installing the low speed worm. I received a response from a list member who had found that the combination of low speed worm and older worm gear did make a fair amount of noise. Based on the feedback I received about their advantages, if all goes well I'll consider replacing the geared wheel sets with NWSL parts where possible (my engines have two different axle bearing setups). Will Quinn
