① Since bevel gears are cone shaped, they produce axial thrust forces. Especially for spiral bevel gears, the directions of change thrust the spiral arm and the direction of rotation. This is shown below. The bearings must be selected properly to be able to deal with the thrust forces. For details, see the technical reference, section on “Gear Forces” (Page 700).
②If bevel gear is mounted on a shaft far from the bearings, the shaft can bend. We recommend mounting bevel gears as close to the bearings as possible. This is especially important since most bevel gears are supported on one end. The bending of shafts will cause abnormal noise and wear, and even cause fatigue failure of the shafts. Both must shafts and bearings to design strong enough.
③ Because the thrust load bevel gears, the gears, shafts and bearings tend to release during operation. Bevel gears should be fastened to the shaft with keys and set screws, taper pins, step shafts, etc.
④ When installing MBSA or MBSB spiral bevel gears in B7 style (ring type), always secure the gears on the mounting base with taper pins to absorb the rotational loads. It is dangerous to secure with bolts only.
⑤ Stock bevel gears are designed such that, when met by the specified mounting distance with a tolerance of H7 – H8, the backlash shown in the table obtained. Mounting must distance error, offset error and shaft angle error minimized to avoid excessive noise and wear. For various contact conditions teeth, see the following illustrations, “right tooth Contact” and “Incorrect Tooth Contact”.