Spur Gears

WM Berg manufactures Spur Gears which have straight teeth cut on the rim, parallel to the axis of rotation.

Spur Gears are the most common & cost-effective type of gear. Spur Gears are designed to transmit motion & power between parallel shafts, which rotate in opposite directions.

Plastic, brass, steel, & aluminum are the materials generally used for manufacturing Spur Gears. Electric screwdrivers, oscillating sprinklers, windup alarm clocks, washing machines, clothe dryers & conveyors are just a few everyday machines where spur gears are used.

Spur gears are also used in construction equipment, machine tools, marine hoists, turbine drives, multi-spindle drives, indexing equipments & roller feeds

Spur Gear Types

Anti-Backlash Gears

An Anti-Backlash Gear is a gear having minimum or no backlash (lash or play)

• Designed for precision applications (i.e. radio tuning dial)
• Springs are used for tensioning
• Plastic, brass, stainless steel & aluminum are the materials generally used for manufacturing
• Available in several different pitches (24 – 96)
• Available in spur, bevel & worm gears

In order for anti-backlash gears to work together (mesh) they must have the same diametral pitch (pitch) & pressure angle (PA)

Cluster Gears

A series or “clusters” of spur gears on a shaft or gear blank, each with varying diameters.

Gear Blanks

We can conveniently provide the spur gear blank, as in the case where you the number of teeth cannot be specified yet. Or, we can provide the spur gear blanks, where you can cut to your desired lengths.

Pinion Shafts

A Pinion Shaft is a cylindrical piece with teeth that run parallel to the length of the shaft.

Ratchets and Pawls

The ratchet portion consists of a gear wheel or linear rack with teeth, while the pawl is a spring-loaded pivoting component. Either the teeth or the pawl, are slanted at an angle. Such a system is designed for unidirectional movement, and thus almost zero backlash.

Spur Gears Stock

Spur Gear Materials

17-4 PH Stainless Steel

Type 17-4PH (“precipitation-hardening”) stainless steel is arguably the most common of stainless steels.  This type of stainless steel has a high level of strength and a moderate level of corrosion resistance.  Type 17-4PH stainless steel can be found in a wide variety of applications including medical devices, aerospace platforms, as well as chemical and food processing. 

303 Stainless Steel

Type 303 Stainless Steel is another popular form of stainless steel that posses non-magnetic properties. This type of stainless steel is strong, but not as strong as 17-4PH, and it cannot be heat-treated. Type 303 stainless steel has a high level of resistance to corrosion, and is popular with applications involving surgical devices.

Aluminum Anodized

To guard against oxidation, aluminum can be strengthened and be made more durable through the anodizing process. This process involved placing the material in a chemical bath. After an electric is passed, a coating for “anodized aluminum” is formed, thus provided increased durability.

Brass

Brass is a metal that is an alloy of copper and zinc. Brass is commonly used in applications where low friction is required. Hence, using brass for gear manufacturing is popular. However, brass is much more susceptible to stress fractures than stainless steel.

Cast Polyurethane

Cast Polyurethane is advantageous in that it can be shaped into virtually any kind of shape. It is one of the strongest and abrasive-resistant elastomers available. Cast polyurethane can be developed with varying levels of coefficients of friction, be made flame resistant, and can be made to be flexible at very low temperatures.

Spur Gear Styles

Clamp Hub

A spur gear that utilizes a clamping hub (a small rod that projects from the side of the gear) to tighten the inner diameter of the gear around the shaft, or accompanying component.

Hubless

Hubless Spur gears typically rely on friction, via press-fitting, or some compound adhesive to be attached to a shaft, or accompanying component.

Pin Hub

Pin Hub Spur gears are similar to clumping hubs, except this style of spur gear utilizes a pin to tighten the gear around the shaft, or accompanying component.