Panasonic 3 Series 40W Gearboxes can only be used with Panasonic 3 Series 40W Motors.
Panasonic 3 Series Motors and Gearboxes
Panasonic 3 Series Motors, with identical mounting dimensions as the G Series, replace and offer the following benefits over G Series Motors:
Grease-lubricated gearboxes
10000hr life
Quiet operation
Class B motor insulation
A number of additional design changes include:
A number of gearboxes with shorter gearheads
Different motor shafts (non-interchangeable with G Series gearboxes)