Specifications

Precision grade JIS grade N9 (JIS B1702-1: 1998) JIS quality 5 (JIS B1702: 1976)

Reference

portion of gear Normal plane

Gear teeth Standard full depth

Normal

pressure angle 20°

Helix angle 45°

Material CAC702
① When mating screw gears manufactured from the same materials they may cause abrasion and scoring. It is suggested to mate Screw Gears composed of different materials.

② The allowable torques proven in the table are the calculated values according to the assumed usage conditions.

③ The backlash values shown in the table are the theoretical ideals for the backlash in the normal direction of a pair ofidentical gears in mesh.

④ For offset shaft Aluminum-Bronze Screw Gears applications, match a RH with a RH, or LH with a LH, to produce a set of screw gears. For parallel shaft applications,

mesh reverse hands (RH and LH) of helical equipment sets.

⑤ If the bore diameter can be significantly less than φ 4, then the bore tolerance class is usually H8. If the bore diameter can be φ 5 or φ 6, and the hole length (total size) exceeds three times the diameter, then the class can be H8.