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GH series - 48 Pages

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Catalogue excerpts

GH SERIES Gearheads for High-precision Control taking your servomotor performance to the limit The GH SERIES Gearheads are based upon the highly successful, high-precision RV Series Reduction Gears. The high-performance RV has over 2 million units in service in various applications around the world today. The GH SERIES are highprecision servomotor gearheads that provide significant advantages in terms of ease-of-use and cost for performance.

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\Selection Flow Chart_/~ 06 External Dimension Drawing Reduction Gear 10 X, Model Code Selection (Precautions) 15 N^Combination with Non-standard Product /~ 22

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High shock load capability High rigidity High precision High speed The double-end support design and unique pin gear mechanism provide the following advantages: (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 A set of internal main bearings (large angular ball bearings) Heavy load support enables complete support of heavy external loads. (2) Easy motor mounting Middle flange Motor flange (option) Spur gear Crankshaft Input spline set (option) Output flange Hold...

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Rotation of the servomotor is transmitted through 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 . Fig. 1 First reduction section Since they are directly connected, the crankshafts have the same rotational speed as the spur gears . Input gear Two RV gears are mounted around the needle bearings on the eccentric region of the crankshaft. (In order to balance the equal amount of force, two RV gears are mounted) . Spur gear When the crankshafts rotate, the RV gears mounted on...

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Specifications Rating Table (*1) Model Code Ratio Code Rated Output Speed (No) Acceleration/ Deceleration Torque N-m (Kgf-m) Momentary Maximum Torque N-m (Kgf-m) Allowable Output Speed Backlash Allowable Torque Continuous Operation Intermittent Operation Inertia Moment I (I=GD2/4) Input Shaft Equivalent Note: *1. The rating table shows the specification values of each reduction gear. *2. The allowable output speed may be limited by heat depending on the operation rate. If you use this product with the operation rate per cycle exceeding 50% or allowable output speed during continuous operation,...

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Glossary Life Rating Rigidity (Torsional Rigidity and Lost Motion) and Backlash The lifetime resulting from the operation with the rated torque and the rated output speed is referred to as the “life rating”. For the GH reduction gear, the life rating is 6,000 hours continuous. When torque is applied to the output shaft while the input shaft is fixed, torsion is generated on the output shaft according to the torque value and a hysteresis curve results. • The value of b/a is referred to as “torsional rigidity”. • The torsion angle at the mid point of the hysteresis curve width at ±3% of rated torque...

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Selection Flow Chart Check the condition of the load torque applied to the reduction gear. A sample diagram is shown below. (1) Study of load characteristics Calculation of average load torque (Tm) Calculation of average output speed (Nm) External shock torque Tem Load cycle diagram Select the reduction gear with the higher model number. Calculation of life rating (Lh) Provisionally select the model number from the Rating Table. Rotation load torque Max torque for startup Constant torque t1 t2 t3 Shock apply time Acceleration Constant Deceleration tem time operation time time Lh ≥Required life...

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(2) Study of main bearing capacity Check the condition of external load applied to the reduction gear. (1) Study of load characteristics When the load moment and the axial load are applied concurrently, • Usage condition ensure that the reduction gear is T1 = 391 N-m T2 = 98 N-m T3 = 193 N-m Tem = 2600 N-m used within the corresponding t1 = 0.1 sec t2 = 0.15 sec t3 = 0.1 sec tem = 0.02 sec allowable moment range, N1 = N3 = 50 r.p.m. N2 = 100 r.p.m. Nem = 100 r.p.m. which is indicated in the Allowable Moment Diagram. Calculation of average load torque Selection example Study of axial load (W2) •...

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Performance No-load running torque Case temperature: 20˚C Lubricant: The no-load running torque that is converted to the input shaft side value should be figured out according to the following equation: Input shaft equivalent no-load running torque (N-m) Input shaft equivalent = no-load running torque Speed ratio (N-m) Input shaft equivalent no-load running torque (N-m) Output shaft speed (r.p.m.)

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Model Code When ordering or making an inquiry, use the following model code. (3) Input spline code (4) Motor flange code Output shaft type code 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 motor flanges (standard/semi-processed product)...

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External Dimension Drawing The total length does not include the length of the motor flange. Output shaft type Output flange type Reduction Gear

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The total length does not include the length of the motor flange. Output shaft type Output flange type

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External Dimension Drawing The total length does not include the length of the motor flange. Output shaft type Output flange type Reduction Gear

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The total length does not include the length of the motor flange. Output shaft type Output flange type

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External Dimension Drawing GH100 Reduction Gear The total length does not include the length of the motor flange.

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Model 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 attached on the following pages. Check the thickness of the motor flange according to the following equation: Thickness of motor flange D = (A + LR - L) - LL Model Code LL Input Spline Insertion Amount (mm) Reduction...

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