Precision Reduction Gear RV High-speed Gearhead

Contributing to society with our ‘Moving it. Stopping it.’ technologies Nabtesco's technologies supporting society Nabtesco manufactures products which are used in everyday life. Our high-accuracy components are essential for moving objects; they may be rarely visible, but are the foundation of everyday objects that you see moving and wonder how. Nabtesco’s technologies are found throughout objects that move and stop people’ s lives. Do or s Ro bo ts Precision reduction gears precisely move and stop industrial Nabtesco technology opens and closes automatic doors in buildings and platform doors...

CONTENTSWho is Nabtesco? The key words for Nabtesco are ‘motion control'. We use our strengths in the fields of component and systems technologies to develop highly creative products. Through the Nabtesco Group as a whole, we can also utilize our advantage of expertise to maximum effect in order to further enhance these strengths. In the air, on land and at sea, we have established a large share in various fields of both international and domestic markets. Nabtesco will continue to evolve by utilizing its strengths in many fields and by exploring the possibilities of the future. April 2002 Initiation...

GH High Speed Gearheads taking your servomotor performance to the limit The GH Series provides significant advantages in terms of ease-of-use. It is based on a highly successful product, the Precision Reduction Gear RV, used in various applications around the world.

Features and configurations High reliability High rigidity High precision High speed The double-end support design and unique pin gear mechanism provide the following advantages: Heavy load support A set of internal main bearings (large angular ball bearings) enables complete support of heavy external loads. (1) Pre greased (2) Easy motor mounting thanks to the special input spline and motor flange. (1) Capable of 7 times the rated torque (2) High rigidity as well as small backlash [6 arc.min] (3) Capable of high output speed with low reduction ratio (1/11 to 1/31) (4) High torque density Middle...

Main GH Series applications  Robot travel axis  Loader travel axis

 Ball screw drive axis

Principle of operation 1. Rotation of the servomotor is transmitted through Fig. 1 First reduction section the input gear to the spur gears, and the speed is reduced accordingly with the gear ratio between the input gear and the spur gears. This is the first reduction section . 2. Since they are directly connected, the crankshafts have the same rotational speed as the spur gears . 3. Two RV gears are mounted around the needle Input gear bearings on the eccentric region of the crankshaft. (In order to balance the equal amount of force, two RV gears are mounted) . 4. When the crankshafts rotate,...

GH Series model code Model code When ordering or making an inquiry, use the following model code. Model code Model code Ratio code Input spline code Motor flange code Output shaft type code 100 Selection of model code 1. Only 21 and 31 can be used as the ratio code of the GH100. 2. Only the flange type output shaft is available for the GH100. 3. Select the model code according to the attached Quick Selection Table of Model Code. 4. When you use a servomotor not listed in the Quick Selection Table of Model Code, select the parts compatible with the servomotor from among the input spline sets and...

modelModel code selection (Precautions) 1. Select the model code that is compatible with the servomotor being used according to the Quick Selection Table of Model Code. 2. If a compatible servomotor is not listed in the Quick Selection Table of Model Code, select a part that is compatible with the servomotor according to the external dimension drawings for the input spline set and motor flange shown in pages 15 to 20. • Check the thickness of the motor flange according to the following equation: Thickness of motor flange D = (A + LR - L) - LL Model Code Combination of reduction gear and servomotor...

■ Flange type external load diagram

Model: GH17 Specifications and dimensions are subject to change without notice.

Model: GH24 Specifications and dimensions are subject to change without notice.

Model: GH40 Specifications and dimensions are subject to change without notice.

Model: GH100 Specifications and dimensions are subject to change without notice.

The shape of the part shown here is only a representation. For this reason, the actual shape may differ from the drawing shown here. The part numbers attached with * at the end are our revised numbers. These are subject to change without advance notice. The transmission torque of the wedge-type frictional coupling varies depending on the motor shaft diameter. Due to this, the momentary maximum allowable torque or allowable acceleration/deceleration torque may not be ensured.

For the GH100 input spline set, contact us. The part numbers attached with * at the end are our revised numbers. These are subject to change without advance notice. The shape of the part shown here is only a representation. For this reason, the actual shape may differ from the drawing shown here.

For the GH100 input spline set, contact us. The part numbers attached with * at the end are our revised numbers. These are subject to change without advance notice. The shape of the part shown here is only a representation. For this reason, the actual shape may differ from the drawing shown here.

External dimensions Motor flange Circle type (Flange mounting hole) 4-ØH ØJ spot facing (Motor mounting tap hole) 4-Nominal P x Depth Q (Motor mounting tap hole) 4-Nominal P x Depth Q (Flange mounting hole) 6-Ø, ØJ spot facing Circle type Model Motor Flange Dimension (mm) Reduction Gear Mounting Dimension (mm) Motor Mounting Dimension (mm) Circle type (30S) Model Motor Flange Dimension (mm) Reduction Gear Mounting Dimension (mm) Motor Mounting Dimension (mm) The shape of the part shown here is only a representation. For this reason, the actual shape may differ from the drawing shown here. The...