Overview: The document provides comprehensive technical specifications and guidelines for KHK stock racks, designed for high precision linear motion applications. It covers material types, precision grades, and assembly instructions.

Specifications: Various rack types are detailed, including ground racks, racks with machined ends, and helical racks. Specifications include module size, total length, material, heat treatment, tooth surface finish, and precision grade. For instance, KRG ground racks are made from SCM440 material, thermally refined, and ground for strength and abrasion resistance.

Material Types: Racks are made from materials like SCM440, S45C, SUS304, MC901, and C3604, each offering unique properties such as rust resistance and suitability for food machinery.

Precision and Tolerances: Precision grades range from 1 to 8, with specific tolerances for pitch errors, face width, height, and straightness. A table of tolerance ranges is provided to aid in selection based on precision requirements.

Assembly and Application Hints: Guidelines include ensuring proper mounting distance, using high precision bases, and securing racks to prevent shifting. Proper methods for joining racks and maintaining constant mounting distance to ensure proper backlash are emphasized.

Selection and Usage Recommendations: Users should select racks based on application needs, considering factors like allowable bending strength and surface durability. A mating gear selection chart is provided, with cautions on secondary operations.

Technical Information: Includes gear strength calculations, assumptions for bending strength and surface durability, and definitions based on JGMA standards. Contact information for technical support is also provided.

Specifications and Materials: Detailed specifications for racks and pinions, including ground racks and thermal refined racks, are provided. Materials like SCM440 and S45C are used, with heat treatments such as thermal refining and induction hardening. The precision grade is KHK R 001, with a standard full depth gear teeth and a pressure angle of 20°.

Procedures and Recommendations: Secondary operations can be performed on all KHK stock racks except those with induction hardened gear teeth. Care should be taken to maintain gear precision. Guidelines for connecting racks, securing them with dowel pins, and removing burrs are provided.

Standards and Tolerances: Pitch tolerances for different modules are outlined, with specific values for modules ranging from m0.5 to m10. The reference pitch is calculated using the formula p = π・m.

Application Examples: Examples include using KRG Ground Rack and SSG Ground Spur Gear in an auto loader, and the SRO Round Rack as a work storage device.

Tables and Data: Extensive tables detail specifications of various racks, including catalog numbers, module numbers, number of teeth, shapes, dimensions, allowable forces, and weights, providing critical data for rack selection.

Cautions: Allowable forces are based on assumed usage conditions. Backlash values are calculated from the addition of half the backlash of the mating pinion and specified table values. Caution is advised during secondary operations, especially on induction hardened gear teeth.

Product Specifications and Characteristics: Specifications for various rack types, including Molded Flexible Racks and Steel Helical Racks, are provided. Each type has specific allowable forces, bending strengths, and weights, calculated based on assumed usage conditions.

Usage and Application Guidelines: Molded Flexible Racks are not suitable for high positioning accuracy applications. Guidelines for racks used with pinions, including radius of curvature and backlash calculations, are provided. Stainless Steel Racks undergo heat treatment and passivation for rust resistance.

Secondary Operations and Modifications: Guidelines for performing secondary operations with caution to avoid deformation and ensure safety are provided. Hardening racks with bolt holes is discouraged due to potential deformation.

Technical Tables and Data: Tables provide detailed data on allowable forces, bending strengths, surface durability, and weights for each rack type and catalog number. Specifications include module sizes, effective number of teeth, material types, and heat treatment details.

Recommendations and Cautions: Users are advised to refer to specific pages for detailed explanations of allowable forces, backlash values, and axial thrust forces. Proper fastening techniques are recommended to prevent damage under heavy loads.