Specifications
Precision grade JIS quality N9 (JIS B1702-1: 1998) JIS quality 5 (JIS B1702: 1976)
Reference
portion of gear Aluminum-Bronze Screw Gears 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 trigger abrasion and scoring. It is recommended 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 demonstrated in the table are the theoretical values for the backlash in the normal 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 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 is usually less than φ 4, then the bore tolerance class is definitely H8. If the bore diameter is definitely φ 5 or φ 6, and the hole length (total length) exceeds three times the diameter, then the class can be H8.
EN 
ES 
PT 
AR 
ID 
KO 
IT 
DE 
ZH 
JA 
RU 
BG 
FR 
ZH-TW