Aluminum-Bronze Screw Gears

Specifications

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

Reference

portion of gear Normal plane

Gear teeth Aluminum-Bronze Screw Gears standard full depth

Normal

pressure angle 20°

Helix angle 45°

Material CAC702
â‘  When mating screw gears manufactured from the same material they may trigger abrasion and scoring. It is suggested to mate Screw Gears made up of different materials.

② The allowable torques proven in the table are the calculated values based on the assumed usage conditions.

③ The backlash values shown in the table will be the theoretical values for the backlash in the standard direction of a set ofidentical gears in mesh.

â‘Ł For offset shaft applications, match a RH with a RH, or LH with a LH, to make a set of screw gears. For parallel shaft applications,

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

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

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