H1212L Steel Helical GearBoston Gears stock helical gears are manufactured in both right and left handed configurations with an industry standard 45 helix angle to transmit motion and power between non intersecting shafts that are parallel or at 90 to each other. For parallel shaft operation, helical gears with opposite hand helix angles are required. For shafts at 90, a same hand helix angles must be used. For parallel shaft applications, the overlapping tooth contact of our

always remember that the difference in the number of teeth between the internal gear and pinion should not be less than 15 (14 1/2° PA) or 12 (20° PA)

Click here for spec sheet: NAPA Spec Sheet

Input Style: No Flange (projecting shaft)

Self sealing vanes

Diametral Pitch: 16

Fan Cooled Rating: No

And don’t forget Boston Gear’s Guaranteed Same Day Shipment program – revolutionary premium free guaranteed same day shipment for in-stock items

Step Down Adapters are ideal for making the shaft smaller

Two-Piece Housing has rust-proof plated finish

Center Distance: 5

Click here for spec sheet: CSA Spec Sheet

A shifting of the valve changes direction–even when the air motor is running full open