Bowser shaft size

[doctorwayne]

Yeah, Bowser and pretty-well all North American-built steam models (MDC, Tyco/Mantua) use 1/8" for drive shafts and driver axles. NWSL sells it in various lengths and they also offer couplings to connect metric-sized motor shafts to SAE-sized gearbox input shafts, and complete gearboxes, in various ratios, designed specifically for Bowser locos.

Wayne