How to Use Gearheads

For Oriental Motor's pinion type AC motors, a dedicated gearhead, which can be coupled to the AC motors easily, is available (sold separately).

With the reduction of the motor speed through the gearhead, an increase of torque is achieved. A large number of gear ratios are available depending on your application.

Gearheads are all low noise types. The change in the mating section, the primary source of noise in a gearhead, from a spur gear to a helical gear along a with completely redesigned gearcase and ball bearing creates a reduction in noise by -10dB ~ 15dB, compared to conventional products.

For GN and GU types, gearheads with inch-size output shafts are also available.
GC and GCH types are designed to be used with C-B motors.
V Series gearheads are using high strength gears and a rigid ball bearing mechanism in order to achieve long life with heavy load.
Gearheads for BX, FBL II and AXH are designed to be used with high-speed motors.

List of Gearheads

Separate Type Gearheads

Combination Type Gearheads

Motor and Gearhead Combinations
When connecting gearheads, be sure to match the pinion shafts and frame size. For products with a geared motor, a gearhead is already coupled directly onto the motor.

Motor and Decimal Gearhead Combinations
The GN and GU type gearheads are available with decimal gearheads (sold separately) with a gear ratio of 10:1. They should be used in applications in which large enough gear ratios cannot be attained with a single gearhead unit (except for 0GN type).

Note: Although the gear ratio of 10:1 of the decimal gearhead theoretically translates in a 10 time increase in torque available on the output shaft, it is not possible to make full use of this torque. The torque permissible in actual use is limited by the physical construction of the gearhead and is expressed as its maximum rated torque. (Refer to individual products).

Motor and Right-Angle Gearhead Combinations
The 4GN, 5GN and 5GU pinion type gearheads are available as right-angle gearheads.

Right-Angle gearheads are also available for the BH Series and BHF Series. These gearmotors come pre-assembled.

Permissible Overhung Load and Permissible Thrust Load

When a chain, gear, belt, etc. is used as the transmission mechanism, the overhung load (a load applied perpendicular to the direction of the output shaft) is always applied on the output shaft. Since the overhung load acts on the output shaft and its bearing directly, it has a great influence on the life of the gearhead. Be careful not to exceed the permissible value (refer to product specifications). If the overhung load greatly exceeds the permissible value, it will lead to the shortening of bearing life or damage to the bearing, as well as warping or fatigue loss of the output shaft after repeated load. In such situations, a support such as the one illustrated must be designed to take up the overhung load.
Since connecting a transmission mechanism directly to the output shaft exerts an unbalanced load on the shaft, connect mechanisms as close to the gearhead as possible. When using transmission mechanisms involving helical gears or worm gears, they are subject not only to overhung load but to thrust load (a load applied in the axial direction of the output shaft) as well. Ensure that the thrust load does not exceed the permissible value in the products specifications.