External Spur Gears & Splines

External spur gears have teeth that are both straight and parallel to the axis of rotation and are usually produced from cylindrical gear blanks. They are used to transmit power and motion between parallel shafts and are, by far, the most common type of gear used in the largest number of applications. The involute profile of spur gear teeth allows for smooth operation between mating gears and permits greater variations in mounting distances without affecting proper gear action.

External splines typically have teeth cut on the outside diameter of a drive shaft parallel to the axis of shaft rotation. The teeth of splines may be of various forms including involute, crowned, parallel, or serrated. Shafts with external splines typically mate with components having internal splines to transmit torque and motion in the same axis.

External Spur Gear & Spline Experience

Geartronics produces countless configurations of external spur gears and splines in numerous shapes and sizes using a variety of materials and manufacturing processes that include CNC turning, CNC milling, CNC gear hobbing, gear shaping, broaching and finish grinding. We provide gears with hubs, keyways, slots, internal splines, cross holes, threaded holes, and just about any other machined feature imaginable. We’ll assure that all of your requirements for heat treating, plating, marking and testing are met using our in-house resources or our vast source of qualified and certified secondary processors.

Whether you require a standard, modified or custom gear tooth profile in quantities ranging from one part to thousands of parts Geartronics will produce the components you need and deliver them when you need them. If you’d prefer, we can also cut gear teeth on blanks that you supply or supply machined gear blanks to you for further processing.

We have manufactured external gears and splines for customers from a number of industries, including:

  • Aerospace
  • Appliance
  • Automotive
  • Consumer Product
  • Defense
  • Food Processing
  • Hand & Power Tools
  • Industrial Equipment
  • Machine Controls
  • Medical Device & Equipment
  • Motion Control
  • Oil & Gas

External Spur Gear and Spline Materials

Geartronics has the capability of producing external spur gears and splines from a wide-range of materials, including:

Alloy Steel
Castings & Forgings
Carbon Steel
Ductile Iron
Pre-Heat Treated Steel
Stainless Steels
Tool Steel

contact us

Geartronics Incorporated
100 Chelmsford Road
North Billerica, MA 01862

Call Us: 978.663.6566

Fax: 978.667.3130