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 material they may cause abrasion and scoring. It is suggested to mate Screw Gears made up of different materials.

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

③ The Aluminum-Bronze Screw Gears backlash values demonstrated in the table are the theoretical values for the backlash in the standard direction of a pair ofidentical gears in mesh.

④ For offset shaft applications, match a RH with a RH, or LH with a LH, to create a set of screw gears. For parallel shaft applications,

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

⑤ If the bore diameter is significantly less than φ 4, then the bore tolerance class is certainly H8. If the bore diameter is certainly φ 5 or φ 6, and the hole length (total length) exceeds 3 times the diameter, then your class is also H8.