QJM Series Radial Piston Hydraulic Motors
Short Description:
QJM radial piston hydraulic motors provide high torque density and smooth low-speed output for winches, travel drives, slewing and heavy equipment.
QJM radial piston hydraulic motors provide high torque density and smooth low-speed output for winches, travel drives, slewing and heavy equipment.
| Selection Item | QJM Series Option / Range | Selection Note |
|---|---|---|
| Motor principle | Inner cam-ring radial piston design | Designed for high torque density and smooth low-speed output. |
| Displacement | Medium to large displacement options | Higher displacement provides more torque at lower speed. |
| Torque | High starting and running torque | Check continuous torque and peak torque separately. |
| Speed | Low-speed and ultra-low-speed operation | Minimum stable speed should be confirmed for precision movement. |
| Pressure | Configured by duty and hydraulic system design | Continuous pressure, peak pressure and return pressure all matter. |
| Shaft and flange | Custom shaft, flange and mounting options | Important for replacement projects and OEM machine integration. |
| Brake/valve options | Available according to application | Useful for winches, holding loads and controlled movement. |
| Environment | Mobile, mining, marine and industrial duty | Guides sealing, coating and maintenance recommendations. |
Engineering Notes
- For direct drive applications, check radial load, bearing load and connection stiffness.
- For winch applications, match motor displacement with gearbox ratio, brake capacity and target line speed.
- For continuous industrial rotation, review oil cooling and filtration to control heat and wear.
- For replacement projects, provide the current motor nameplate and installation drawing whenever possible.
Typical Applications
- Hydraulic winches: heavy-duty pulling, lifting, towing and hoisting systems.
- Travel and track drives: mobile machinery, crawler equipment and special vehicles.
- Slewing and rotary drives: cranes, drilling rigs, turntables and indexing systems.
- Mining and tunneling equipment: harsh-duty hydraulic drive systems with shock loads and frequent reversing.
- Marine deck machinery: capstans, winches and auxiliary rotating equipment.
- Industrial machinery: steel plants, presses, heavy conveyors and low-speed high-torque rotation.
Best-Fit Buyer Profile
QJM Series motors are best for OEMs, hydraulic system integrators and maintenance teams that need a robust radial piston motor for high torque, low speed and severe-duty operation.
Request a Technical Recommendation
For a fast recommendation, send torque, speed, pressure, flow, mounting drawing, shaft and port details, duty cycle and working environment to jw.luo@jst-hydraulic.com or WhatsApp +86 186 6857 0723.
Detailed selection notes, FAQ, comparison tables and related guide links are kept here for buyers who need deeper technical information.
QJM Series hydraulic motors are inner cam-ring radial piston motors for heavy-duty low-speed high-torque drive applications. They are designed for high torque density, smooth ultra-low-speed operation and reliable performance in mobile machinery, mining equipment, marine deck machinery and industrial hydraulic systems.
Why Choose QJM Series Hydraulic Motors
- High torque density: strong output torque in a compact motor size, suitable for machines with limited installation space.
- Ultra-low-speed stability: radial piston and cam-ring design supports smooth motion at low rpm and under heavy load.
- Heavy-duty construction: suitable for shock loads, frequent reversing, harsh duty cycles and demanding hydraulic drive systems.
- Direct drive potential: in many applications QJM motors can reduce or simplify external reduction stages.
- Flexible integration: shaft, flange, port, displacement and brake or valve options can be matched to the equipment.
- OEM and replacement support: JST can compare imported radial piston motors and recommend compatible QJM alternatives.
How to Select a QJM Hydraulic Motor
QJM motor selection should start from the real working load rather than only motor frame size. Useful selection data includes:
- Required torque: starting torque, continuous torque and peak torque determine displacement and pressure margin.
- Target speed: ultra-low-speed requirements should be stated clearly, including minimum stable speed.
- Working pressure and peak pressure: pressure affects torque output, leakage, heat and service life.
- Available flow: flow determines motor speed and heat generation under continuous operation.
- Duty cycle: winch duty, travel drive, slewing, drilling and industrial rotation all require different margins.
- Load type: shock load, reversing, holding load, over-running load and radial shaft load should be checked.
- Mounting interface: provide flange, shaft, port orientation, installation envelope and connection drawing.
QJM vs BM Orbital Hydraulic Motors
Choose BM Series Orbital Hydraulic Motors for compact, economical light-to-medium LSHT applications. Choose QJM when the application requires higher torque density, smoother ultra-low-speed motion, better heavy-duty durability or direct drive performance under severe load.
Common Custom Options
- Displacement and frame size matched to torque and speed
- Shaft, flange and port configurations for OEM installation
- Integrated brake or valve options for holding and control requirements
- Enhanced sealing for outdoor, mining or marine environments
- Special mounting interface for replacement or retrofit projects
- Custom painting, labeling and documentation for OEM supply
Related Hydraulic Drive Products
QJM motors are often used with heavy-duty winches, travel drives and industrial rotating systems. For winch assemblies, see JSJ Series Hydraulic Winches. For compact orbital motor drives, see BM Series Motors. For final drive assemblies, see JST Series Wheel Drives. For other radial piston motor families, see JNM Series Motors and JHM Series Motors.
FAQ
What is a QJM hydraulic motor best used for?
QJM motors are best for heavy-duty low-speed high-torque applications such as winches, travel drives, slewing drives, drilling rigs, mining equipment and industrial rotary drives.
Can QJM motors operate at very low speed?
Yes. The inner cam-ring radial piston design supports smooth ultra-low-speed motion, especially where stable torque and controlled rotation are required.
Can JST help replace an imported radial piston motor?
Yes. Send the existing motor model, displacement, mounting dimensions, shaft, port layout, pressure, flow and working load. JST can review whether a QJM configuration is suitable.
What information is needed for quotation?
Send required torque, target speed, pressure, flow, duty cycle, load type, shaft/flange drawing, port orientation and working environment.
Related Heavy-Duty Hydraulic Drive Resources
- JSJ Series hydraulic winches using high-torque hydraulic drive packages
- JST Series wheel drives and final drives for travel-drive applications
- JSC hydraulic transmission units for integrated motor-gearbox-brake assemblies
- How to select a hydraulic winch for marine equipment