Helical Gears
Higher Load Carrying Capacity Over Spur Gears
Helical Gear
Size Range and Capability for Helical Gears
Maximum Pitch Diameter – 36”
Diametral Pitch – 3.0 – 48
Face Width – 13.0
Unground Tooth – AGMA Q9
Ground Tooth – AGMA Q13
Helical gear teeth in mesh
Spur Gears
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
Size Range and Capability for Spur Gears
Maximum Pitch Diameter – 36”
Diametral Pitch – 3.0 – 48
Face Width – 13.0
Unground Tooth – AGMA Q9
Ground Tooth – AGMA Q13
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.
Splines
For Positive Engagement of Mating Parts
Spline Gear
Size Range and Capability for Spline Gears
Maximum Pitch Diameter – 32”
Diametral Pitch – 4/8 - 80/160
Face Width – 13.0
Unground Tooth – AGMA Q9
Ground Tooth – AGMA Q13
External spline on the shaft of a bevel gear
Arrow produces three types of splines which are detailed as follows.
Fig. 1 - Involute Splines
Fig. 2 - Comparison of Involute
and Straight Sided Serration Splines
Fig. 3 - Straight Sided Splines
- Internal and External
Internal Spur Gears
For Compact, High Load Carrying Capacity
Internal Spur Gear
Size Range and Capability for Internal Spur Gears
Maximum Pitch Diameter – 32”
Diametral Pitch – 3.6 – 48
Face Width – 8.0
Unground Tooth – AGMA Q9
Ground Tooth – AGMA Q13
Illustration of Internal Spur Gear
with mating external spur gear