Check the paint with specific gear is why?
Use checked, will be a pair of gear gear side coated with a layer of red lead, and the slight brake, according to the working direction of rotation gear 2 to 3 ring,
Check the gear through dyeing method is mainly used for measuring the precision of gear contact. The comprehensive index to evaluate the gear contact accuracy is contact spot, that is, the contact traces on the flank of the assembled gear pair after running under slight braking
A mark left on the side of another gear. Normal meshing gear, contact spot should be symmetrical at the pitch circle up and down, and has a certain area, such as contact area is greater than the percentage of more than the number of qualified (specific value can be found in the manual).