Note:

1,Housing material:Zinc alloy.
2,Backlash,at no-load: ≤2°
3,Bearing at output: sleeve bearings
4,Radial play of shaft: ≤0.05mm 
5,Radial play shaft: ≤0.3mm 
6,The gear box can apply to 40ZY,RS-555 motors. 
7,When the motors using at low speed,high gear  ratio will cause gear motor torque more than 60kgf.cm.At this torque the gears will be broken easily.Be noted.
8,when install the gear motor please don't let the screws go through into the gearbox internal more than 7mm.lf so the gearbox will be demaged.

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