Airsoft Canada - View Single Post - motor axis bushing loose in gearbox shell

smims · May 19th, 2011, 15:41

Hi everyone (ill try to explain in english but you can reply in french)
I'm a bit confuse with my G&G M4 I bought recently (V2 Gearbox). I'm wondering why the swivel motor axis bushing (the swivel thing on the motor axle) is loose in the gearbox shell. I suppose it should be pretty slide fit to make sure the motor alignement is good. I measured the axis bushing and get 0.355, the hole in the gearbox shell is 0.392. So i have near 0.040" of movement. I suppose the motor seat on the lower part of the GB when i adjust the proper motor depth (and give an angle to the motor). I made a shim bushing to increase the diameter of the axis bushing and the motor depth definitely not the same.

I also measured 2 motors and get: 0.315 and 0.364

I presume the 0.315" motor bushing would really be bad for my gun by adding an other 0.020" on the "y" axis for a total of 0.04" (maybe the motor's bevel gear will contact the shaft of the gearbox bevel gear)

did you ever see that loose fit? Why is it built like this? I don't find any answer on the internet.

May 19th, 2011, 15:41	#1
smims Trader rating Join Date: Aug 2005 Location: Quebec	motor axis bushing loose in gearbox shell Hi everyone (ill try to explain in english but you can reply in french) I'm a bit confuse with my G&G M4 I bought recently (V2 Gearbox). I'm wondering why the swivel motor axis bushing (the swivel thing on the motor axle) is loose in the gearbox shell. I suppose it should be pretty slide fit to make sure the motor alignement is good. I measured the axis bushing and get 0.355, the hole in the gearbox shell is 0.392. So i have near 0.040" of movement. I suppose the motor seat on the lower part of the GB when i adjust the proper motor depth (and give an angle to the motor). I made a shim bushing to increase the diameter of the axis bushing and the motor depth definitely not the same. I also measured 2 motors and get: 0.315 and 0.364 I presume the 0.315" motor bushing would really be bad for my gun by adding an other 0.020" on the "y" axis for a total of 0.04" (maybe the motor's bevel gear will contact the shaft of the gearbox bevel gear) did you ever see that loose fit? Why is it built like this? I don't find any answer on the internet.