ND21B-7/8 Steel Spur GearBoston 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

Number of Threads: Double Thread

14 1/2° PA gears are used extensively because of lower backlash and smoother

self-centering design with mounting flange for use in through-bored components

• Instant Magnetic Release

the tooth-contact area of helical gears is very small

Click here for spec sheets: SSER Spec Sheet

a spring loaded pressure plate (magnet armature) presses against the rotating discs

allows for clean operation

Click here for spec sheets: SUCSHA Spec Sheet

Bost-Bronz® bearings are also highly versatile and can be used for production and replacement requirements throughout general industry

Because the efficiency of a worm gear drive depends on the lead angle and number of starts on the worm

Pre-Lubricated: Yes