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Product catalog summary

Overview: This document provides technical specifications and guidelines for various types of gears and sintered metal bushings used in mechanical systems. It includes detailed tables of dimensions, materials, and tolerances for injection molded spur gears and sintered metal bushings.

Specifications:

Materials: The gears are made from Duracon acetal (M90-44) with a standard full depth and a pressure angle of 20°. The sintered metal bushings are made from oil-impregnated sintered bronze.
Precision Grades: The gears conform to JIS grade N12 (JIS B1702-1: 1998) and JIS grade 8 (JIS B1702: 1976).
Tooth Hardness: The tooth hardness ranges from 110 to 120 HRR.

Dimensional Data:

The document includes tables listing catalog numbers, module numbers, number of teeth, and various dimensions such as bore, hub diameter, pitch diameter, and face width for different gear models.
It also provides data on allowable torque, bending strength, and backlash for each gear model.

Tolerances:

The bore tolerance generally ranges from -0.05 to -0.30, with possible positive values at the central portion of the hole.
Tolerances for injection molded products are specified based on size, ranging from ±0.20 mm for dimensions below 3 mm to ±0.50 mm for dimensions above 30 mm.

Recommendations and Cautions:

Allowable torques are calculated based on assumed usage conditions, and more details are available on Page 31.
Theoretical backlash values are provided for identical gears in mesh.
Secondary operations on injection molded products should be avoided due to potential air bubbles within the material.

Catalog excerpts

Other Bevel Worm Screw Bevel Miter CP Racks R . Internal Helical Spur Products Gearboxes Gear Pair Gears Gears Gears & Pinions ac s Gears Gears Gears Injection Molded Spur Gears [Caution on Product Characteristics] © The allowable torques shown in the table are calculated values according to the assumed usage conditions. Please see Page 31 for more details. © The backlash values shown in the table are the theoretical values for the backlash in the normal direction of a pair of identical gears in mesh. © The bore tolerance is generally -0.05 to -0.30 but may be + value at the central portion of the hole. @ To find dimensional precision, see the table "Tolerance of Injection Molded Products". [Caution on Secondary Operations] © Injection molded products may have air bubbles inside of the material; please avoid performing secondary operations. Sintered Metal Bushings The table below shows a series of standard metal bushings that can be pressed into standard injection molded gears. ■ Tolerance of Injection Molded Products. (Unit : mm) Other Bevel Worm Screw Bevel Miter CP Racks Dacks Internal Helical Spur Products Gearboxes Gear Pair Gears Gears Gears & Pinions Gears Gears Gears * The precision grade of this product is equivalent to the value shown in the table. Total length Material:Oil impregnated sintered bronze

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