Motor shaft diameter

[bplessy]

Does anyone know the diameter of the motor shaft of Bachmann motor H61206 used in the HO GP50 engine.  Any info on adding flywheels is also appreciated.

[Stephen D. Richards]

2 mm.

[Stephen D. Richards]

On the flywheel question...which frame do you have?  If you have the horizontal later type frame you will first need to machine out some of the frame area.  I would turn some flywheels down just a bit as well to make them fit.  Make sure the flywheel shaft holes are not very much bigger than the shaft diameter!  Use a glue that is designed for secureing the flywheel to the shaft.  Several are out there.  If in doubt, Joe Delia at Proto Power West/A Line has a good one.  Micro Mark sells one as well.  Hope that helps some.  Stephen

[bplessy]

Thanks for the input.  The upper half of the frame  will have to be milled and possibly the lower half also.  I am considering flywheells from NWSL that are 630 mm diameter and a slip fit on a 2mm motor shaft.  Do you know the ball diameter on the GP50 drive shaft?  I am also considering using one of their universal couplings if I can determine the dimensions of the ball.

Boake

[bplessy]

Correction: Not 630 mm but .630 inches or 16 mm.

Boake

[Stephen D. Richards]

I'm not sure of the size of the U joint but you may have to change both sides of the drive shaft.  Fairly easy to do but does take a little time.  Both A Line and Micromark as well as Walthers have a universal drive line kit.  I've not used any of North West Short Lines drive line items so I'm not sure of their compatibility  with the universal drive line componets.  Stephen

[richg]

You can email Dave at NWSL. He has done work for me and does respond.

Rich