RMBX-100 Dinamic Radial Piston Motor 106cc 200bar

Product Overview

The RMBX-100, RMBX-150, RMBX-175, RMBX-200, RMBX-250, RMBX-300, RMBX-400, and RMBX-500 are low-speed high-torque (LSHT) radial piston hydraulic motors from the Italian Dinamic Oil S.P.A. (“Fulmine”/”Lightning” brand) RMBX series. Featuring a proven radial piston architecture, these motors are widely deployed in hydraulic transmission systems for mobile machinery and industrial equipment.

Founded in 1970 and headquartered in Modena, Italy, Dinamic Oil has nearly 50 years of professional experience in power transmission and hydraulic solutions. The RMBX series motors are renowned for their low-speed operation, high starting torque, wide speed range, high reliability, high efficiency, long service life, and low noise characteristics.

Designed as 100% interchangeable direct replacements for original Dinamic Oil RMBX series motors, these products match OEM specifications in mounting dimensions, porting interfaces, and performance characteristics. Every unit undergoes 100% simulated duty cycle testing prior to shipment, validating volumetric efficiency, mechanical efficiency, and sealing integrity under actual operating load conditions.

The RMBX series is particularly well-suited for injection molding machine screw drives, hoist winches, drum drives, various rotary mechanism drives, and tracked or wheeled travel drives.

Technical Specifications 

RMBX-100

• Model: RMBX-100

• Series: Dinamic Oil RMBX Radial Piston Hydraulic Motor (“Fulmine”/”Lightning” brand)

• Displacement: 106.4 cm³/rev

• Max Continuous Pressure: 200 bar

• Intermittent Pressure: 230 bar

• Peak Pressure: 300 bar

• Continuous Speed: 400 rpm

• Max Speed: 650 rpm

• Continuous Power: 12.5 kW

• Peak Power: 31.0 kW

• Torque Coefficient: 0.160 daNm/bar

• Weight: Approx. 26 kg

RMBX-150

• Model: RMBX-150

• Displacement: 152.0 cm³/rev

• Max Continuous Pressure: 200 bar

• Intermittent Pressure: 230 bar

• Peak Pressure: 300 bar

• Continuous Speed: 400 rpm

• Max Speed: 650 rpm

• Continuous Power: 18.0 kW

• Peak Power: 44.0 kW

• Torque Coefficient: 0.240 daNm/bar

• Weight: Approx. 26 kg

RMBX-175

• Model: RMBX-175

• Displacement: 173.5 cm³/rev

• Max Continuous Pressure: 180 bar

• Intermittent Pressure: 230 bar

• Peak Pressure: 300 bar

• Continuous Speed: 350 rpm

• Max Speed: 600 rpm

• Continuous Power: 16.0 kW

• Peak Power: 46.5 kW

• Torque Coefficient: 0.270 daNm/bar

• Weight: Approx. 24 kg

RMBX-200

• Model: RMBX-200

• Displacement: 199.5 cm³/rev

• Max Continuous Pressure: 180 bar

• Intermittent Pressure: 230 bar

• Peak Pressure: 300 bar

• Continuous Speed: 300 rpm

• Max Speed: 550 rpm

• Continuous Power: 17.5 kW

• Peak Power: 48.5 kW

• Torque Coefficient: 0.310 daNm/bar

• Weight: Approx. 24 kg

RMBX-250

• Model: RMBX-250

• Displacement: 251.9 cm³/rev

• Max Continuous Pressure: 200 bar

• Intermittent Pressure: 230 bar

• Peak Pressure: 300 bar

• Continuous Speed: 300 rpm

• Max Speed: 450 rpm

• Continuous Power: 22.5 kW

• Peak Power: 50.5 kW

• Torque Coefficient: 0.400 daNm/bar

• Weight: Approx. 33 kg

RMBX-300

• Model: RMBX-300

• Displacement: 297.7 cm³/rev

• Max Continuous Pressure: 200 bar

• Intermittent Pressure: 230 bar

• Peak Pressure: 300 bar

• Continuous Speed: 300 rpm

• Max Speed: 450 rpm

• Continuous Power: 26.5 kW

• Peak Power: 60.0 kW

• Torque Coefficient: 0.470 daNm/bar

• Weight: Approx. 33 kg

RMBX-400

• Model: RMBX-400

• Displacement: 394.5 cm³/rev

• Max Continuous Pressure: 200 bar

• Intermittent Pressure: 230 bar

• Peak Pressure: 300 bar

• Continuous Speed: 300 rpm

• Max Speed: 400 rpm

• Continuous Power: 35.0 kW

• Peak Power: 70.5 kW

• Torque Coefficient: 0.620 daNm/bar

• Weight: Approx. 49 kg

RMBX-500

• Model: RMBX-500

• Displacement: 514.3 cm³/rev

• Max Continuous Pressure: 200 bar

• Intermittent Pressure: 230 bar

• Peak Pressure: 300 bar

• Continuous Speed: 240 rpm

• Max Speed: 330 rpm

• Continuous Power: 36.5 kW

• Peak Power: 75.0 kW

• Torque Coefficient: 0.810 daNm/bar

• Weight: Approx. 62 kg

Note: Pressure and speed parameters may vary across different configurations. Please refer to the corresponding Dinamic Oil technical manual for specific model details.

Key Technical Advantages

1. Radial Piston Design for High Starting Torque

The RMBX series employs a proven radial piston architecture that delivers exceptional low-speed high-torque output. High starting torque enables stable high-torque output at extremely low speeds. This makes the motor particularly suitable for heavy-load start-up applications such as injection molding machine screw drives, winch, and drum drives.

2. Wide Speed Range for Versatile Operation

The RMBX series supports a wide speed range from 240 rpm to 650 rpm (varies by model). Excellent low-speed stability and wide speed range enable the motor to meet both low-speed heavy-load and higher-speed requirements, significantly enhancing application flexibility.

3. Three-Tier Pressure Rating for Versatile Load Conditions

The RMBX series offers three pressure grades—180–200 bar (continuous), 230 bar (intermittent), and 300 bar (peak). This stepped pressure design allows the motor to operate flexibly under varying load conditions: continuous pressure for steady-state operation, intermittent and peak pressures for short-term overload requirements.

4. 100% Interchangeability – Zero-Modification Drop-In Replacement

Manufactured to exact OEM mounting dimensions, porting specifications, and performance standards, these motors achieve 100% interchangeability with original Dinamic Oil RMBX series units. No machine modifications are required—simply replace and resume operation, minimizing downtime and reducing maintenance costs.

5. 100% Simulated Duty Cycle Testing for Extreme Environment Reliability

Every motor undergoes 100% simulated duty cycle testing before shipment, validating performance under continuous, intermittent, and peak pressure conditions—ensuring long-term reliability in demanding mining, construction, and industrial applications.

6. Low-Noise Operation with Extended Service Life

The RMBX series is recognized for its low noise and long service life characteristics. Optimized internal flow paths and precision-machined critical friction pairs effectively reduce operating noise while extending motor service life.

7. Low Oil Sensitivity with Strong Adaptability

RMBX series motors exhibit low sensitivity to oil quality, maintaining stable operation even in applications with less-than-ideal fluid cleanliness conditions. This makes them particularly advantageous in harsh environments such as mining and construction.

8. Compact Lightweight Design

The RMBX-100 through RMBX-200 weigh only approximately 24–26 kg, RMBX-250 through RMBX-300 approximately 33 kg, with large-displacement models up to approximately 62 kg. The compact design enables easy integration into the limited installation space of various machinery.

Application Areas

• Injection Molding Machinery: Screw drives (particularly well-suited)

• Hoisting & Transport: Hoist winches, drum drives, various rotary mechanism drives

• Construction Equipment: Roller travel drives, tracked travel mechanism drives

• Mining Equipment: Mining and construction machinery hydraulic drives

• Metallurgical Machinery: Heavy metallurgical equipment hydraulic drives

• Petroleum & Coal Mining: Oil drilling equipment, coal mining machinery hydraulic drives

• Marine Industry: Marine deck machinery hydraulic drives

• Forestry Machinery: Forestry machinery travel and working drives

• Geological Drilling: Geological drilling equipment hydraulic drives

Expert Maintenance Tips

1. Pre-Installation Preparation: Before using the RMBX series motor, read and understand the complete Dinamic Oil instruction manual. For first commissioning, fill the motor housing with hydraulic fluid using a filling unit with filtration not less than 10 µm. Never operate the motor without fluid.

2. Case Drain Pressure Monitoring: Radial piston motors are sensitive to housing backpressure. Ensure the case drain line is unobstructed and returns to a separate oil tank to prevent seal damage from excessive housing pressure.

3. Coupling Alignment: Precise alignment between the motor shaft and drive shaft is required with minimal tolerance. After installation, manually rotate the coupling to verify smooth operation.

4. Oil Cleanliness Control: Recommended system filtration not less than ISO 4406 18/13. Regular oil analysis is recommended with filter change intervals adjusted based on contamination levels.

5. Working Pressure Selection: The RMBX series offers three pressure grades (continuous 180–200 bar / intermittent 230 bar / peak 300 bar). Select the appropriate pressure grade based on the duty cycle of your specific application—avoid prolonged operation at intermittent or peak pressure levels.

6. Regular Inspection Schedule: Regular inspection of the hydraulic system and motor is recommended. Check hydraulic fluid level daily and monitor operating temperature, noise levels, and case drain flow regularly. Abnormal increases may indicate internal wear or seal degradation.

7. Gearbox Matching Considerations: The RMBX series is often paired with Dinamic Oil planetary gearboxes. Ensure the motor output torque matches the gearbox input torque rating to prevent overload damage.