MSGA ・ MSGB

Product catalog summary

Specifications
The document specifies ground spur gears in the MSGA and MSGB series. These gears meet JIS grade N5 (JIS B1702-1: 1998) and JIS grade 1 (JIS B1702: 1976) precision standards. They feature a standard full depth with a 20° pressure angle, are made from SCM415 material, and undergo carburizing heat treatment, achieving a tooth hardness of 55 to 60 HRC.

Product Characteristics
Keyway dimensions follow JIS (Js9) tolerance, though heat treatment may cause deviations. Allowable torques are based on assumed usage conditions, and backlash values are theoretical for identical gears in mesh. Products marked with “**” have minimal material between the keyway corner and tooth root, which should be considered during selection.

Secondary Operations
No secondary operations are possible on these precision-finished gears due to the carburizing process. Custom gear production services are available for non-stock products.

Gear Kit
The GCU-S Spur Gear Kit includes two-stage spur gears for parallel axes, enabling speed changes with a gear ratio of 1.89 and weighing approximately 1 kg.

Data Tables
The document provides detailed tables of gear models, including specifications such as module, number of teeth, shape, bore, hub diameter, pitch diameter, outside diameter, face width, hub width, total length, web thickness, and web outer diameter. It also lists keyway dimensions, allowable torque values, backlash, and weight for each gear model.

Catalog excerpts

MSGA • MSGB Ground Spur Gears 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 Specifications [Caution on Product Characteristics] © Although the dimensions of the keyway are made to the JIS (Js9) tolerance, there may be some deviations due to the effects of the heat treatment. ©The allowable torques shown in the table are the 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 for a pair of identical gears in mesh. @ Products marked with "**" have a small amount of material between the corner of the keyway and the tooth root. This mode of failure must be considered when selecting these gears. For details, please see our web site. * For products not categorized in our KHK Stock Gear series, custom gear production services with short lead times is available. For details see Page 8. [Caution on Secondary Operations] © No secondary operations can be performed on these precision finished gears due to the applied carburizing process. For products which are different in specifications, such as bore size, we accept custom-made gear orders and provide a price quote. GCU-S Spur Gear Kit Installment : Parallel axes gears (Two-stage) Gear Type : Spur Gears Gears : 2 units of SS1.5-16 2 units of PS1.5-22 Gear Ratio : 1.89 Weight : Approx. 1kg The Gear Kit contains two-stage spur gears and allows speed increases / reductions, and includes the most commonly used combinations of gears. Other Bevel Worm Screw Bevel Miter CP Racks Racks Internal Helical Spur Products Gearboxes Gear Pair Gears Gears Gears & Pinions Gears Gears Gears 34 For updated information, please see KHK Web Catalog.

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MSGA • MSGB Ground Spur Gears 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 Specifications [Caution on Secondary Operations] © No secondary operations can be performed on these precision finished gears due to the applied carburizing process. For products which are different in specifications, such as bore size, we accept custom-made gear orders and provide a price quote. Other Bevel Worm Screw Bevel Miter CP Racks Racks Internal Helical Spur Products Gearboxes Gear Pair Gears Gears Gears &...

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MSGA • MSGB Ground Spur Gears 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 Specifications [Caution on Secondary Operations] © No secondary operations can be performed on these precision finished gears due to the applied carburizing process. For products which are different in specifications, such as bore size, we accept custom-made gear orders and provide a price quote. GCU-S Spur Gear Kit Installment : Parallel axes gears (Two-stage) Gear Type : Spur Gears Gears : 2 units of SS1.5-16 2 units...

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MSGA•MSGB AAAAiAiiiAiAiAAAAiiiiiAAAAAiiiiiiiAAAAAAAiiAHAAAiAiAiAiAiAiii Ground Spur Gears 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 Catalog No. [Caution on Product Characteristics] © Although the dimensions of the keyway are made to the JIS (Js9) tolerance, there may be some deviations due to the effects of the heat treatment. ©The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see Page 31 for more details. © The backlash...

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