QJM32-42/52 Series High-Torque Hydraulic Motor

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3 year

Product details

1. Product Overview

TheQJM32-42/52 Series High-Torque Hydraulic Motoris a low-speed, high-torque hydraulic actuator designed for heavy-duty applications. It is widely used in mining machinery, construction equipment, and industrial systems, converting hydraulic energy into reliable rotational power. Its key advantages include high starting torque, stable low-speed operation, and durability in harsh environments.

2. Technical Specifications

【表格】

Parameter Description

Model Range QJM32, QJM42, QJM52 (varying displacement and torque)

Displacement 32–52 cm³/rev (model-dependent)

Rated Pressure 20–25 MPa (adjustable based on model and operating conditions)

Peak Pressure ≤31.5 MPa (short-term allowable)

Rated Torque 500–1,500 Nm (varies with pressure and model)

Max Speed 500–800 rpm (low-speed models down to 50 rpm)

Weight 25–45 kg (model-dependent)

Fluid Mineral oil or anti-wear hydraulic oil (viscosity grade ISO VG 32–68)

3. Structural Features

• Axial Piston Design: Uses a swashplate axial piston structure for stepless speed adjustment via swashplate angle modification.

• High-Strength Bearings: Equipped with double-row tapered roller bearings to handle radial and axial loads, extending service life.

• Optimized Sealing: Combines O-rings and dust seals to prevent leakage and contamination.

• Modular Design: Allows replacement of wear parts (e.g., port plates, piston shoes) to reduce maintenance costs.

• Impact Resistance: Cast iron or aluminum alloy housing for durability in severe conditions.

4. Performance Advantages

• High Starting Torque: Delivers ≥90% of rated torque at startup, ideal for heavy loads.

• Low-Speed Stability: Maintains smooth operation below 50 rpm, minimizing vibration and noise.

• High Efficiency: Volumetric and mechanical efficiencies exceed 85% (total efficiency).

• Versatility: Supports bidirectional rotation and operates reliably under high pressure, heat, or dust.

• Long Lifespan: Key components are heat-treated and surface-hardened for enhanced wear resistance.

5. Applications

• Mining Machinery: Roadheaders, shearers, conveyor drives.

• Construction Equipment: Crane slewing mechanisms, concrete mixer drives.

• Building Systems: Piling machines, road rollers, shield tunneling propulsion.

• Industrial Automation: Heavy conveyor belts, rotary table drives.

6. Installation & Maintenance

• Installation Requirements:

• Ensure motor shaft alignment with load (coaxiality error ≤0.1 mm).

• Use filters (≤25 μm filtration) in the hydraulic system.

• Maintenance Recommendations:

• Inspect oil cleanliness every 500 hours; replace if necessary.

• Regularly check seals for wear and replace promptly.

• Avoid prolonged overloading to prevent overheating.

7. Selection Guide

• By Torque Demand: Choose larger displacement models (e.g., QJM52) for higher loads.

• By Speed Demand: Select low-speed models for direct drive or add gearboxes for high-speed needs.

• By Environment: Enhance cooling and sealing for high-temperature or dusty conditions.

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

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3 year

Main Product: hydraulic motor, gear box, hydraulic pump, hydraulic valve , hydraulic winch, hydraulic system

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