Boston Gear’s internal gears are spur gears turned "inside out
Center Distance: 5
Output Bore/Shaft Diameter: 1
Straight/Spiral Tooth: Straight Tooth
Click here for spec sheets: HUCNPPA Spec Sheet
NH18B-7/8 Steel Spur Gear 2.125" ID Boston Gear’s internal gears areBoston 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