158
7 HK-ST SERIES
7.6 Geared servo motor
7.6 Geared servo motor
Mount the geared rotary servo motor in the specified mounting direction.
Not doing so will cause oil leakage which may lead to a fire and malfunction.
When using an oil-lubricated geared servo motor, remove the oil when transporting and mounting the servo
motor. If the geared servo motor is tipped over while filled with oil, oil leakage may occur.
Do not attach a gear reducer removed from a geared servo motor to a servo motor which originally does not
have a gear reducer. If the geared servo motor being used requires repair, contact your local sales office.
The geared rotary servo motors are for general industrial machine and for high precision applications.
Some geared rotary servo motors also have an electromagnetic brake.
For general industrial machine (G1/G1H)
Common specifications
*1 For grease-lubricated geared servo motors, grease is filled from the factory.
*2 If the permissible load to motor inertia ratio exceeds the indicated values, contact your local sales office.
*3 The gear reducer efficiency varies depending on the reduction ratio. The gear reducer efficiency also varies depending on the operating
conditions such as output torque, speed, and temperature. The values in the table are the representative values at the rated torque,
rated speed, and the room temperature, and are not guaranteed values.
*4 This is a design value and not a guaranteed value.
*5 The unit of backlash is calculated as follows: 1 arc minute = 0.0167 °
*6 The torque characteristics of the HK-ST152 is the specifications calculated by derating the HK-ST172W with the output ratio (rated
torque: 7.2 N•m). The moment of inertia is the same as the HK-ST172W.
*7 The torque of the geared servo motor does not increase even if in combination with a servo amplifier with a larger capacity.
Item Description
Mounting method Page 159 Mounting method and mounting direction
Mounting direction Page 159 Mounting method and mounting direction
Lubrication method Page 159 Lubrication method
Recommended lubricants
*1
Page 159 Recommended lubricants
Output shaft rotation direction Opposite direction of rotary servo motor output shaft
Backlash
*5
40 arc minutes to 2 ° on the gear reducer output shaft
*4
Permissible load to motor inertia ratio
(converted into equivalent value on servo motor shaft)
*2
4 times or less
Maximum torque
*7
3 times the rated torque for the rotary servo motor
*6
Maximum speed
(For servo motor shaft)
Page 160 Maximum speed
IP rating (gear reducer area) Equivalent to IP44
Gear reducer efficiency
*3
85 % to 94 %
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