RA gearbox

[solissydney]

Hi. I am looking for a gearbox for my RA drive. 400 to 1 ratio,with a 6mm shaft. The gear is 175mm dia. 360 teeth. Worm rotates once in 4 min.
Suitable for mating to the stepper motor. See image.
Any suggestion as where I should start looking. I have tried the web, not easy.

[bojan]

This looks like Crouzet gearbox.. expensive...
http://www.crouzet-usa.com/downloads/motors/Czt_BLDC_Ctlg2004.pdf

[solissydney]

Thanks Bojan,
Just finished 'exercising' the gearbox with the help of a pair of pliers on the shaft turning the gears fast back and forth and succeeded in freeing up the gears to the stage where I could turn it by hand and, I gained two turns of the stepper motor shaft per minute. Great, now I might not need a replacement gearbox. But will now know where to go to get a one. And, no sign of any stalling of the motor.

Ken:)