Axis Gears

Parallel Axis Gears

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Helical Gears

Higher Load Carrying Capacity Over Spur Gears

Size Range and Capability for Helical Gears

Maximum Pitch DiameterDiametral PitchFace WidthUnground ToothGround Tooth
36”3.0 – 4813.0AGMA Q9AGMA Q13
Helical Gear
Spur Gears

Spur Gears

Size Range and Capability for Spur Gears

Maximum Pitch DiameterDiametral PitchFace WidthUnground ToothGround Tooth
36”3.0 – 4813.0AGMA Q9AGMA Q13

An Arrow Gear Specialty

This animation shows two involute gears rotating in mesh, with the left driving the right. The blue arrows show the contact forces between the two gears.
Fig.1 - This animation shows the basic principle of how an involute profile is formed.

The Simplest Form of Parallel Axis Gears

While widely known for our bevel gear products, Arrow is also a leading supplier of spur gears.

Pump Gears

Pump gears are similar to spur gears in their geometry. However, pump gears are not used to transmit power between shafts. Instead, they are used for the positive displacement of fluid in pumping applications – most commonly for fuel systems. The benefit of using pump gears in this application over other methods is the precise volume of fluid that is displaced during each revolution.

Pump Gear
Pump Gear
Splines

Splines For Positive Engagement of Mating Parts

Size Range and Capability for Spline Gears

Maximum Pitch DiameterDiametral PitchFace WidthUnground ToothGround Tooth
32”4/8 – 80/16013.0AGMA Q9/10AGMA Q13
External spline on the shaft of a bevel gear
Fig. 1 - Involute Splines
Fig. 2 - Comparison of Involute and Straight Sided Serration Splines
Fig. 3 - Straight Sided Splines - Internal and External
Spline Gear
Internal Spur Gears

Internal Spur Gears For Compact, High Load Carrying Capacity

Size Range and Capability for Internal Spur Gears

Maximum Pitch Diameter Diametral Pitch Face Width Unground Tooth Ground Tooth
32” 3.6 – 48 8.0 AGMA Q9 AGMA Q13
Illustration of Internal Spur Gear with mating external spur gear
Internal Spur Gear

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