Standard Miter Gear Assemblies

Gear Ratio 1:1 And 2:1

Jacks may be used in multiple arrangements by connecting shafting, couplings and gear boxes to simultaneously transmit power to the input shafts of the jacks. Nook Industries provides gearboxes for use with jacks. Make certain that the total torque and horsepower required by the arrangement does not exceed the ratings of the box. Miter gear boxes can be operated up to 900 rpm. Higher speeds are permissible at lower torque ratings. Noise levels may increase at higher speeds. The operating efficiency of a miter gear box is 90%.

Rated Load at 1700 rpm
Continuous Duty Intermittent Duty
Model Gear Ratio HP Torque (in-lb) HP Torque (in-lb) Est. Weight (lb)
GB210 1:1 7.67 284 14.44 535 614
GB201S* 1:1 5.75 213.24 10.82 401.32 614
GB210S-R2* 2:1 3.01 111.54 5.56 206.31 614
GB15 1:1 30.5 1,131 38.33 1,421 26
GB12** 1:1 60.51 2724.13 70.48 3172.91 39
* Spiral bevel gear set
** Rated Load calculated at 1400 rpm

Gears are forged alloy steel. Shafts are stressproof steel ground and polished. Clockwise (CW) and counterclockwise (CCW) notations indicate direction of shaft rotation when facing outer end of shaft. All shaft arrangements will operate opposite direction for that shown. To order specify model number and desired shaft arrangement.

GB210, GB210S, and GB210S-R2 are filled with EP-90 Gear lubricant at time of shipment. GB15 and GB12 are shipped dry. Fill with EP-90 Gear Lubricant: Capacity 1 qt.

Please See Image 2-3 in Figure 1 Below for specification charts.

Figure 1