Gears
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Index Section G GEARS PAGE

Stock Gears Spur Gears GEARS Miter Gears Bevel Gears Worm and Worm Gears Gear Rack

“Made-To-Order” Gears

Stock Gears Numbering System Letters (Prex) Indicate Material and Type Gear. Letters (Sufx) Indicate Hardened, Number of Threads, Direction of Rotation and KW and SS. Numbers Indicate Pitch, Number of Teeth, and Ratio (Sufx). Spur Gears S=Steel TS=Steel 20° C=Cast TC=Cast 20° H=Hardened Teeth NM=Non-Metallic Note: Pressure Angle is Shown as a Sufx to Part Number of All Our Spur Gears. R=Rack — Steel RA=Rack — Steel Heavy Backing TR=Rack — Steel 20° Heavy Backing R20=Rack — Steel 20° Wide Face R-6X2 (141⁄2° STD Backing 6PX2′ Long) RA-6X4 (141⁄2° Heavy Backing 6PX4′ Long) TR-6X6 (20° STD...

Styles of Spur Gears Martin Stock Spur Gears are available in ve different styles. Steel Gears are furnished in plain style and plain style with hub. Cast gears are furnished, plain with hub, web with lightening holes, and spoke. Cast gears are machined on all operating surfaces. Martin cast gears are cast with larger hub to provide extra strength and to allow for larger bores. • Plain Without Hubs • All Steel Type B1 • Web • All Steel • Cast Type B2 • Web With Lighten Holes • All Steel • Cast Type B • Plain With Hubs • All Steel • Cast Type B3 • Web With Spokes • Cast

Steel Stock Spur Gears Web With Lighten Holes Steel Catalog Number Diameter Pitch * Recommended Maximum Bore With Keyway and Setscew. † Enlarged Pitch Diameter with Special Tooth Form. ¥ 4″ Face. Bore (Inches) Stock Max.* Hub (Inches) Diameter Proj. 141⁄2 P.A. Gears Will Not Operate With 20° P.A.

Cast Iron Stock Spur Gears Web With Lighten Holes Cast — Style “B” Diameter Catalog Number * Recommended Maximum Bore With Keyway and Setscrew. Bore (Inches) Stock Max.* Hub (Inches) Diameter Proj. 141⁄2° P.A. Gears Will Not Operate With 20° P.A.

Steel Stock Spur Gears Web With Lighten Holes Catalog Number Diameter Pitch * Recommended Maximum Bore With Keyway and Set Screw. † Enlarged Pitch Diameter with Special Tooth Form. Bore (Inches) Stock Max.* Hub (Inches) Diameter Proj. 141⁄2° P.A. Gears Will Not Operate With 20° P.A.

Cast Iron Stock Spur Gears Web With Lighten Holes Cast — Style “B” Diameter Catalog Number * Recommended Maximum Bore With Keyway and Set Screw. Bore (Inches) Stock Max.* Hub (Inches) Diameter Proj. 141⁄2° P.A. Gears Will Not Operate With 20° P.A.

Steel Stock Spur Gears Web With Lighten Holes Catalog Number Diameter Pitch * Recommended Maximum Bore With Keyway and Setscrew. † Enlarged Pitch Diameter with Special Tooth Form. Bore (Inches) Stock Max.* Hub (Inches) Diameter Proj. 141⁄2° P.A. Gears Will Not Operate With 20° P.A.

Cast Iron Stock Spur Gears Type B Plain With Hub Web With Lighten Holes Catalog Number * Recommended maximum bore with keyway and set screw. Quotes for large quantity discontinued cast iron sizes, contact your nearest Martin Facility. Bore (Inches) Stock Max.* Hub (Inches) Diameter Proj. 141⁄2° P.A. Gears Will Not Operate With 20° P.A.

Steel Stock Spur Gears Type B2 Type B Plain With Hub Web With Lighten Holes Steel GEARS Catalog Number Diameter Pitch * Recommended maximum bore with keyway and set screw. ** Check application with factory. † Enlarged pitch diameter with special tooth form. Bore (Inches) Stock Max.* Hub (Inches) Diameter Proj. 141⁄2° P.A. Gears Will Not Operate With 20° P.A.

Cast Iron Stock Spur Gears Type B Plain With Hub Web With Lighten Holes Cast — Style “B” Catalog Number Bore (Inches) Stock Max.* Hub (Inches) Diameter Proj. 141⁄2° P.A. Gears Will Not Operate With 20° P.A. * Recommended maximum bore with keyway and set screw • Consult Factory. Catalog Number Diameter Pitch Bore (Inches) Stock Keyway Hub (Inches) Diameter Proj.

Steel Stock Spur Gears Catalog Number Diameter Pitch * Recommended maximum bore with keyway and set screw. ** Check application with factory. † Enlarged pitch diameter with special tooth form. Bore (Inches) Stock Max.* Hub (Inches) Diameter Proj. 141⁄2° P.A. Gears Will Not Operate With 20° P.A.

Cast Iron Stock Spur Gears Type B Plain With Hub Web With Lighten Holes Cast — Style “B” Diameter Catalog Number Bore (Inches) Stock Max.* Hub (Inches) Diameter Proj. 141⁄2° P.A. Gears Will Not Operate With 20° P.A. * Recommended maximum bore with keyway and set screw. • Consult Factory. Catalog Number Diameter Pitch Bore (Inches) Stock Keyway Hub (Inches) Diameter Proj.

Steel Stock Spur Gears Steel GEARS Catalog Number Diameter Pitch * Recommended maximum bore with keyway and set screw. ** Check application with factory. † Enlarged pitch diameter with special tooth form. Bore (Inches) Stock Max.* Hub (Inches) Diameter Proj. 141⁄2° P.A. Gears Will Not Operate With 20° P.A.

Cast Iron Stock Spur Gears Web With Lighten Holes Cast — Style “B” Catalog Number Bore (Inches) Stock Max.* Hub (Inches) Diameter Proj. 141⁄2° P.A. Gears Will Not Operate With 20° P.A. * Recommended maximum bore with keyway and set screw. • Consult Factory. Catalog Number Diameter Pitch Bore (Inches) Stock Keyway Hub (Inches) Diameter Proj.

Steel Stock Spur Gears Type B Plain With Hub Steel GEARS Catalog Number Diameter Pitch * Recommended maximum bore with keyway and set screw. ** Check application with factory. † Enlarged pitch diameter with special tooth form. Bore (Inches) Stock Max.* Hub (Inches) Diameter Proj. 141⁄2° P.A. Gears Will Not Operate With 20° P.A.

Cast Iron Stock Spur Gears Cast — Style “B” Bore (Inches) Stock Max.* Catalog Number Hub (Inches) Diameter Proj. 14 ⁄2° P.A. Gears Will Not Operate With 20° P.A. * Recommended maximum bore with keyway and set screw. Catalog Number Diameter Pitch Bore (Inches) Stock Keyway Hub (Inches) Diameter Proj.