Industrial S620 External Tooth Spur Gear 1-Inch Reborable Bore 20 Teeth 6-DP

The Martin S620 external-tooth spur gear is a steel power-transmission gear engineered for industrial drives, featuring 20 teeth and a 6 diametral-pitch (DP) profile with a 14.5° pressure angle. Its pitch diameter is 3.333 inches and the outside diameter is 3.666 inches, paired with a 1.5-inch face width to support torque-rich gear trains. It carries a 1-inch reboreable bore, allowing the bore to be re-sized for different shaft diameters (typical bore options range from 1 inch up to 1-3/4 inches per S620 specifications). Designed for durability, the gear’s external tooth form ensures reliable meshing with other 6 DP, 14.5° PA gears in standard spur-drive assemblies, making it suitable for power transmission in industrial machinery and manufacturing equipment where precise, robust gear engagement is required.