Airsoft Canada - View Single Post - High Torque Gears and Backlash

m102404 · March 27th, 2009, 10:14

I tried a set of the individual (not caged) Modify torque up gears...without much sucess. Assembling like I would normally...the result was a very "noisy" mechbox. I ran just the gears (no other internals...just the mechbox, shimmed gears, grip and motor) and it was a real racket. Fully assembled and it sounded like the motor height was way off, no matter how I tried to adjust it.

I tried different bushings and even a different mechbox shell...still much noisier than other common gears that I had lying around.

I tried several different motors (no ICS ones on hand though), with pinion gears in varying states (from BNIB to quite worn but usable). Same result.

Adjusting the motor height did alter the pitch of the screeching...but still unacceptable even at it's quietest.

I ended up shimming the whole set so that all three gears were sitting "higher" off the left side of the mechbox. I suspect that this essentially raised the bevel gear and pushed it closer to the right side of the mechbox while maintaining proper shimming/spacing between the gears. So the pinion gear teeth were then able to find their "sweet spot". This seemed to alleviate the noise, at least so it was acceptable. Still one of the noisier sets of gears I've used.

Note: I did find that mixing the gears with various other makes was fine and it sounded "normal"...but I kept them together in the end.

March 27th, 2009, 10:14	#6
m102404 Tys Trader rating Join Date: Apr 2006 Location: Toronto	I tried a set of the individual (not caged) Modify torque up gears...without much sucess. Assembling like I would normally...the result was a very "noisy" mechbox. I ran just the gears (no other internals...just the mechbox, shimmed gears, grip and motor) and it was a real racket. Fully assembled and it sounded like the motor height was way off, no matter how I tried to adjust it. I tried different bushings and even a different mechbox shell...still much noisier than other common gears that I had lying around. I tried several different motors (no ICS ones on hand though), with pinion gears in varying states (from BNIB to quite worn but usable). Same result. Adjusting the motor height did alter the pitch of the screeching...but still unacceptable even at it's quietest. I ended up shimming the whole set so that all three gears were sitting "higher" off the left side of the mechbox. I suspect that this essentially raised the bevel gear and pushed it closer to the right side of the mechbox while maintaining proper shimming/spacing between the gears. So the pinion gear teeth were then able to find their "sweet spot". This seemed to alleviate the noise, at least so it was acceptable. Still one of the noisier sets of gears I've used. Note: I did find that mixing the gears with various other makes was fine and it sounded "normal"...but I kept them together in the end.