Hansheng Automation (Dongguan) Co., Ltd. is one of the most experienced manufacturers and suppliers of planetary gear box in China. If you're going to wholesale bulk cost-effective planetary gear box made in China, welcome to get pricelist and quotation from our factory. Also, customized service and OEM&ODM service are available.
Hansheng Automation specializes in providing high-precision transmission and packaging machining solutions to customers worldwide. Its core products include the PGH090 planetary gearbox, cam indexer, hollow rotary table, and harmonic drive. Hansheng Automation also offers high-precision gear manufacturing, CNC machining, and casting capabilities. Its planetary gearboxes offer ultra-precision backlash reduction of ≤1 arc minute, gear machining accuracy reaches ISO/DIN/GB Grade 5, and precision grinding accuracy reaches ±0.005mm. Hansheng Automation also offers customized production capabilities using high-end equipment such as Kashifuji. Its products are currently exported to over 60 countries and regions, meeting the transmission and machining needs of various industries with stable precision control and customization capabilities.
Product Introduction
The PGH090 High Precision Planetary Gearbox is a complex and effective gear transmission mechanism for dynamic motion control applications. Unlike standard spur gear planetary boxes, the PGH090 has higher torque transmission, and significantly lower noise levels.
Engineered for seamless integration with servo and stepper motors, this gearbox delivers exceptional positioning accuracy with backlash as low as ≤3 arc-minutes (P1 grade), making it the preferred choice for CNC machinery, packaging lines, and robotic arms.
Products Key Features
Integrated Planet Carrier
The planet carrier and output shaft are machined from a single solid piece of alloy steel, ensuring maximum torsional rigidity and durability under shock loads.
01
High Precision Output
Available in standard backlash (≤7 arc-min) and precision backlash (≤3 arc-min) to meet strict positioning requirements.
02
Maintenance-Free
Sealed with IP65 protection and lubricated with synthetic grease for the entire service life, eliminating the need for oil changes.
03
Universal Motor Mount
The input adapter is customizable to fit any brand of servo motor (Panasonic, Yaskawa, Delta, Mitsubishi, etc.).
04
Product drawings and parameters
To make it easier for you to directly access the key parameters, we have compiled the core data from the diagram into the table below.
| Feature | Specification |
| Model Series | PGH090 (Helical Planetary) |
| Gear Structure | Helical Gear System |
| Stage Options | 1-Stage (Ratio 3-10) / 2-Stage (Ratio 12-100) |
| Rated Output Torque | Approx. 130 Nm - 250 Nm (Depending on Ratio) |
| Backlash Grade | P2 (Standard): ≤3 arc-min / P1 (Precision): ≤2 arc-min / P0 : ≤1 arc-min |
| Efficiency | ≥ 97% (1-Stage) / ≥ 94% (2-Stage) |
| Noise Level | ≤ 60 dB |
| Lubrication | Synthetic Grease (Lifetime Lubrication) |
How planetary gearboxes are used in robot joints
1. rovide strong torque output
A planetary gearbox is a set of several planetary gears rotating around the sun gear. This structure can achieve a rather low reduction ratio in a quite small volume. By rather designing the gear ratio of the planetary gear, the high-speed, low-torque motor input can be transformed into the low-speed, high-torque output demanded by the joint. Following the conversion of the planetary gearbox with a reduction ratio of 10:1 a torque of 100N・m, assuming that the output torque of the motor is 10N・m, one can obtain on the output shaft of the planetary gearbox, which can drive the robot joint to overcome more resistance and achieve actions such lifting heavy objects.
The application scenario is: When an industrial robot has to grab heavier workpieces for handling or processing operations, the great torque output capacity of the planetary gearbox is especially important in the mechanical arm joint. It will ensure that the robot joint can stably resist the torque generated by the load and stop joint damage resulting from insufficient power as well as stagnation of movement.
2. Work on exact motion control
The planetary gearbox claims low backlash and excellent transmission accuracy under principle. This is so because the meshing mode between the planetary gears and the reasonable manufacturing tolerance control makes it possible to carry out the movement exactly according to the set transmission ratio. When some highly exact robot joints are used for precision assembly tasks, the planetary gearbox can, for example, precisely enlarge or reduce the rotation angle of the motor depending on the reduction ratio and transfer it to the joint output shaft. Highly important for robot joints needing exact position control; if the motor rotation angle accuracy is ±0.1°, after the planetary gearbox is decelerated the angle accuracy of the output shaft can still be kept at a high level.
Robots must exactly place tiny electronic components at designated points on circuit boards in robot operations in the field of electronic chip manufacturing. Planetary gearboxes can guarantee the accuracy of the placement of electronic components, ensure that robot joints can achieve high-precision position control inside a limited range of motion, and help to prevent production quality problems generated by joint motion errors.
3. Simple structural design helps
Principle: The small construction of the planetary gearbox lets it be limited space integrated into the robot joint. Design of the planetary gear train places several planetary gears equally around the sun gear. The planetary gearbox is smaller than traditional gearboxes under the same torque requirements and transmission ratio. A conventional parallel shaft gearbox may need a longer axial dimension for a given reduction ratio and torque transmission; a planetary gearbox can combine these functions in a reasonably small cylinder through a reasonable internal structure design, so enabling installation in the limited space of the robot joint.
Context of application: The space is rather limited in the joint design of service robots since the hand joints or neck joints of humanoid service robots usually demand to be small and adaptable. The small size of the planetary gearbox efficiently meets this demand so that the robot joints may move under control and power transmission can be obtained without using too much space.
4. Great resilience and dependability
Typical planetary gearboxes have good load-bearing capacity and fatigue resistance. Its several planetary gears distribute the weight among themselves so that each gear has rather low stress. Planetary gears can maintain constant performance over long-term running under appropriate lubrication and sealing conditions. For example, premium steel planetary gears and advanced heat treatment methods can withstand frequent starts and stops and long-term continuous operation after suitable running-in. Furthermore the lubrication system inside the planetary gearbox extends the service life and effectively reduces friction and wear between gears.
Uses for hypothetical situations: In some long-term continuous working conditions, such handling robots in automated warehouses, these robots must run 24 hours a day without interruption. The great dependability and durability of the planetary gearbox can assure that the robot joints can be used for a long period, so reducing the frequency of maintenance and replacement of parts, so improving the work efficiency and economy of the robot.
Other application areas
CNC Gantry Milling
Driving X/Y axis with high rigidity.
Laser Cutting Machines
Ensuring smooth path control without vibration.
Printing & Lithium Battery Equipment
High-speed continuous operation.
FAQ
Q: What is the routine maintenance cycle for a planetary gearbox?
A: Under normal use, maintenance is recommended every 2000 hours, but this should be reduced to 1000 hours for 24-hour continuous operation.
Q: What key components should be checked during maintenance?
A: ① Gearbox oil level (use API GL-5 85W-90 gear oil, the oil level should be above 1/2 the sight glass);
② Bearing temperature rise (operating housing temperature ≤ 60°C; if exceeded, check lubrication or load);
③ Fastener tightness (especially input/output coupling bolts);
④ Backlash change (use a dial indicator to check; if backlash exceeds 150% of the initial value, replace the gear set).
Q: What materials are used for the gears and housing of the PGH090 planetary gearbox? How is wear resistance ensured?
A: ① The gears are made of 20CrMnTi carburized and quenched steel (surface hardness HRC58-62, core HRC30-35). The carburizing process improves surface wear resistance while maintaining core toughness.
② The housing is made of FC300 gray cast iron (tensile strength ≥300 MPa) and undergoes artificial aging to eliminate internal stress and prevent deformation during long-term operation.
③ Key contact surfaces (such as the planet carrier and bearing mating surfaces) are mirror-ground (Ra ≤ 0.8 μm) to reduce friction. Test data shows that under rated load, the gear life can reach 10^6 cycles.
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