Initially developed as a one-off 'under-the-counter' job, word soon spread and refined production versions followed shortly after. Not traditional motor bogies as such, The QuadDrivers sit directly on the axles with the weight of the engine supported by your own sideframes or chassis.


The design allows one of the driven axles to rock, so 3-point compensation can be used, and the units are small and very compact. The inter-linking geartrain runs as high as possible, keeping the visible space below the footplate free, with the motor ideally situated to fit under a small loco bonnet.


They're great for a small shunters and the ever-increasing range covers a variety of wheelbases. Unless otherwise specified, we'll supply the slowest gear reduction, although a medium and quick(er) version is available. To find out these ratios, you'll need to download the instructions for your specific QuadDriver variant.

QuadDriver 4WD

QuadDriver Type
Worm Bore (to match your motor shaft)your m
Gear Ratio
  • Choice will depend on prototype. Suggested types are:

    • 1015FE; 1020FE (1mm)
    • 1219 Coreless with minor modifications (1.5mm)