Plastic Bevel Gears
Specifications Precision grade JIS B 1704: 1978 grade 4 ＊ Gear teeth Gleason Pressure angle 20° Material MC901 Heat treatment ― Tooth hardness (115 ～ 120HRR)
① Significant variations in temperature or humidity can cause dimensional changes in plastic gears (MC Nylon gears), including bore size (H8 when produced), tooth diameter, and backlash. Please see the section “Design of Plastic Gears” in separate technical reference book. (Page 101). ② The allowable torques shown in the table are calculated values according to the assumed usage conditions. Please see page 283 for more details. ③ Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some differences will occur due to the corner chamfering of the gear tips. ④ Without lubrication, using plastic gears in pairs may generate heat and dilation. It is recommended to mate them with steel gears.