Spur Gears

High-Precision Internal Spur Gear

Spur gears are used in mechanical applications to increase or decrease the speed of a device or multiply torque by transmitting motion and power from one shaft to another through a series of mated gears. Spur gears are one of the most popular types of precision cylindrical gears. These gears feature a simple design of straight, parallel teeth positioned around the circumference of a cylinder body with a central bore that fits over a shaft. In many variants, the gear is machined with a hub that thickens the gear body around the bore without changing the gear face. The central bore can also be broached to allow the spur gear to fit onto a spline or keyed shaft.

As one of the leading spur gear manufacturers, suppliers, and exporters of mechanical products, We offer spur gear and many other products. Please get in touch with us for details.

Mail:[email protected]

Manufacturer supplier exporter of spur gear.

In internal spur gear, teeth are cut on the internal/inner surface. This gear will be like a ring into that pinion or smaller gear meshes inside it & the two shafts will Rotate in the same direction. Internal Spur Gears, unlike spur gears, have the teeth generated on the inner diameter. of the blank. They are generally stronger and more efficient than the mating pinion gear. The pitch diameter of the internal gear must be at least 1.5 times the P.D. of the mating pinion. If this condition is not met, interferences between the tips of the teeth will occur.

Internal gears provide designers with the ability to achieve higher contact and drive ratios than standard spur gears at shorter center distances. They also enable a velocity change without a directional change, which would require an idler gear with standard spurs. Internal spur gears, also known as ring gears, have the same standards as an external spur gear except that the teeth are cut into the inside diameter while the outside is kept smooth. Internal gears can provide a compact solution that delivers large speed reductions and reduced sliding wear action and can be applied in a wide range of equipment & applications. Internal gears are widely used in light-duty applications. When it’s necessary to have two parallel shafts rotate in the same direction, internal gears eliminate the need for an idler gear.

We can custom manufacture internal gears from a variety of materials that include: steel, stainless steel, heat-treated steel, sintered steel, tool steel, ductile iron, gray iron, brass, bronze, copper, cast iron, aluminum, plastic & phenolic. Services include precision blanking, sawing, milling, drilling, tapping, broaching & finishing.

Applications of Internal Gears

  • Rollers
  • Electric Screwdrivers
  • Pumps
  • Positioning Equipment
  • Automotives
  • Bicycle components

Related Products

Spur Gear Video