heavy duty helical gear drives that offer long-life performance and simplified maintenance
Because the efficiency of a worm gear drive depends on the lead angle and number of starts on the worm
Click here for spec sheet: SAP Spec Sheet
Note: This is the spec sheet for the set screw Locking version
If power fails
NB20B-1/2 Steel Spur Gear 50mm ID heavy duty helical gear drivesBoston Gear spur gears are designed to transmit motion and power between parallel shafts. The different styles offered include spur, gear rack, pinion wire, stem pinions, and internal gears, and most come with a selection of bore diameters, keyways, and setscrews to accommodate a wide variety of application requirements. They are available in plastic, non metallic, brass, steel, and cast iron and are manufactured in a variety of styles, including