JSH Series Hydraulic Slewing Drives and Rotary Drive Units
Short Description:
JSH hydraulic slewing drives combine hydraulic motor, planetary gearbox, brake and pinion output for cranes, drilling rigs and rotary systems.
JSH hydraulic slewing drives combine hydraulic motor, planetary gearbox, brake and pinion output for cranes, drilling rigs and rotary systems.
JSH Hydraulic Slewing Drive Specification Notes
| Product type | Integrated hydraulic slewing drive / rotary drive unit |
| Core components | Hydraulic motor, planetary gearbox, brake, valve or distributor options, output pinion |
| Output style | Pinion output for slewing ring or rotary gear engagement |
| Torque capacity | Selected according to continuous torque, peak torque and safety factor |
| Speed range | Configured according to motor displacement, gearbox ratio and available flow |
| Brake | Spring-applied hydraulic-release multi-disc brake available |
| Hydraulic options | Open circuit, closed circuit, counterbalance valve, relief valve and distributor options |
| Customization | Pinion gear, mounting flange, oil ports, paint, seals and documentation can be customized |
Final parameters should be confirmed according to machine load, slewing ring data, hydraulic system pressure and duty cycle.
Applications of JSH Hydraulic Slewing Drives
- Truck crane and crawler crane slewing systems
- Excavator upper-structure swing and attachment rotation
- Drilling rig rotary platforms and mast rotation mechanisms
- Aerial work platform turntable rotation
- Marine deck machinery and offshore rotary mechanisms
- Concrete pump, forestry machine and special vehicle rotary drives
- Industrial turntables, indexing equipment and heavy-duty rotary systems
The JSH Series is suitable for OEM buyers who need a compact hydraulic rotary drive with integrated braking, planetary reduction and custom pinion output.
Detailed selection notes, FAQ, comparison tables and related guide links are kept here for buyers who need deeper technical information.
JSH Series Hydraulic Slewing Drives and Rotary Drive Units
The JSH Series is a compact hydraulic slewing drive unit developed from the JSC hydraulic transmission platform. It integrates a hydraulic motor, planetary reduction gearbox, multi-disc brake, distributor or valve options, and an output pinion designed to mesh with a slewing bearing or rotary ring gear.
This product is used where equipment needs controlled rotation, high holding torque, compact installation and reliable braking. Typical machines include truck cranes, crawler cranes, drilling rigs, aerial work platforms, excavator attachments, marine deck equipment and industrial rotary mechanisms.
How to Select a Hydraulic Slewing Drive
A correct slewing drive selection should be based on working torque, peak torque, slewing speed, ring gear data, braking requirement and duty cycle. JST Hydraulic can help match the JSH drive to the machine interface and hydraulic system.
- Required output torque: confirm continuous torque, peak torque and safety factor for wind load, boom load or eccentric load.
- Slewing speed: define target rpm at the rotating structure and available hydraulic flow.
- Ring gear interface: provide module, pressure angle, tooth number, pitch diameter and gear direction for the pinion output.
- Hydraulic pressure and flow: confirm rated pressure, maximum pressure, pump flow and motor displacement preference.
- Brake requirement: choose static holding brake, dynamic braking control or brake release pressure according to machine safety needs.
- Mounting space: check flange size, pilot diameter, bolt circle, pinion position and installation orientation.
- Control circuit: specify open circuit, closed circuit, counterbalance valve, relief valve or integrated distributor options.
JSH Slewing Drive vs JSC Transmission Unit
The JSC hydraulic transmission unit is a complete hydraulic gearbox platform for winch, track, industrial and rotary drive systems. The JSH Series is optimized for slewing applications by adding a pinion output and interface details for slewing ring engagement.
| Item | JSH Hydraulic Slewing Drive | JSC Hydraulic Transmission Unit |
|---|---|---|
| Main function | Controlled rotation through pinion and slewing ring | General hydraulic transmission and planetary gearbox output |
| Output interface | Pinion gear for slew bearing or ring gear | Shaft, flange or customized gearbox output |
| Typical use | Crane swing, drilling rig rotation, aerial platform rotation | Winch drive, travel drive, rotary drive and industrial transmission |
| Selection focus | Torque, gear module, backlash, brake and rotation speed | Torque, ratio, output shaft, brake and duty cycle |
Common Custom Options
- Pinion gear module, tooth number, pressure angle and heat treatment according to the slewing ring.
- Hydraulic motor displacement options for speed and torque matching.
- Spring-applied hydraulic-release multi-disc brake for holding and safety functions.
- Integrated counterbalance valve, relief valve, distributor or flushing valve options.
- Flange, pilot, bolt pattern and gearbox orientation matched to the machine frame.
- Sealing, coating and lubrication options for marine, dusty or outdoor working environments.
Engineering Notes for OEM Buyers
| Torque range | Configured according to machine load, safety factor and slewing ring diameter. |
| Gear interface | Pinion data should be confirmed together with the slewing bearing drawing. |
| Hydraulic matching | Motor displacement and gearbox ratio are selected from target rpm, pressure and flow. |
| Brake control | Brake release pressure and control logic should match the host machine safety circuit. |
| Mounting check | Confirm flange, pilot diameter, bolt circle, center distance and clearance around the pinion. |
| Documentation | Dimensional drawings and technical recommendations can be prepared for project review. |
Related Hydraulic Drive Products
For rotary drive systems without a pinion output, see JSC hydraulic transmission units. For high-torque motor drive input, see QJM radial piston hydraulic motors. For compact low-speed motor drive options, see BM orbital hydraulic motors. For lifting and pulling systems, see JSJ hydraulic winches.
FAQ
Can the JSH Series be matched to an existing slewing bearing?
Yes. JST Hydraulic can configure the output pinion and gearbox interface based on the slewing bearing drawing, gear module, tooth number, pressure angle and center distance.
Is the brake integrated inside the slewing drive?
The JSH Series can be supplied with a spring-applied hydraulic-release multi-disc brake. Brake torque and release pressure should be confirmed during selection.
What information is needed for a technical recommendation?
Please provide machine type, required slewing torque, peak load, target speed, hydraulic pressure and flow, slewing ring drawing, installation space and working environment.
Can JST Hydraulic supply a custom mounting flange?
Yes. Mounting flange, bolt pattern, pilot diameter, pinion position and oil port direction can be customized for OEM projects.
Request a Technical Recommendation
Send your slewing bearing drawing, torque requirement, target speed and hydraulic system data to JST Hydraulic. Our team can recommend a JSH hydraulic slewing drive configuration and provide dimensional information for engineering review.