MRE1400G-F1N1N1N1N1000 Parker Radial Piston Motor 1369cc

Product Overview

The MRE1400G-F1N1N1N1N1000/33942 is a large-displacement radial piston hydraulic motor from the Parker Denison Calzoni MR/MRE series, MRE 1400 G specification. With a displacement of 1369.5 cc/rev, it delivers continuous working pressure of 230 bar, intermittent pressure of 280 bar, peak pressure up to 400 bar, maximum speed of 280 rpm, and maximum power of 102 kW. The model code decodes as: “MRE” = fixed displacement with brake option, “1400 G” = displacement frame size, “F1” = flange mounting, “N1” = standard six-bolt port connection, “1000” = casing drain configuration.

The motor features Calzoni’s patented hydrostatic oil column transmission, in which pressurized oil columns transmit stator reaction forces directly to the rotating shaft, eliminating the connecting rods and piston pins found in conventional radial piston motors. This design fundamentally removes connecting-rod bearing friction losses, achieving mechanical efficiency up to 96%, volumetric efficiency up to 99%, and starting torque up to 95% of theoretical value.

The MRE1400G offers complete interchangeability: the 250 h7 mounting flange, six-bolt port connections, and splined shaft interface are identical to the original Parker Calzoni specification. Every unit undergoes 100% simulated duty-cycle testing before shipment.

Technical Specifications 

• Model: MRE1400G-F1N1N1N1N1000/33942

• Brand Series: Parker Denison Calzoni MR / MRE

• Motor Type: Radial piston, fixed displacement, low-speed high-torque

• Displacement: 1369.5 cc/rev (83.6 in³/rev)

• Continuous Working Pressure: 230 bar (3336 PSI)

• Intermittent Working Pressure: 280 bar (4061 PSI)

• Peak Pressure: 400 bar (5802 PSI)

• Minimum Speed: 0.5 rpm

• Maximum Speed: 280 rpm

• Theoretical Specific Torque: 21.8 N·m/bar

• Maximum Power: 102 kW

• Mounting Flange: 250 h7

• Port Connection: Six-bolt connection (N1 configuration)

• Shaft Type: Splined shaft

• Seal Material: Buna-N (Nitrile)

• Rotation: Clockwise (bi-directional available)

• Weight: Approximately 140 kg

• Brake Option: Integrated multi-disc parking brake (standard on MRE series)

Key Technical Advantages

① Patented Hydrostatic Oil Column Transmission — Elimination of Connecting-Rod Friction

The core innovation of the Calzoni MR/MRE series is the elimination of the connecting-rod mechanism found in conventional radial piston motors. Pressurized oil columns transmit stator reaction forces directly to the eccentric shaft, without connecting rods or piston pins as force-transmission intermediaries. This design removes connecting-rod bearing friction losses and thrust loading, achieving mechanical efficiency of 96% and volumetric efficiency of 99%. For continuous-duty applications such as injection molding machines and winches, this efficiency advantage translates directly into significant energy savings.

② Five-Piston Configuration — Low-Speed Smoothness and Precise Positioning

The five-piston radial layout with a low-excitation-frequency eccentric shaft enables smooth operation at extremely low speeds (minimum 0.5 rpm) without stick-slip. For applications requiring precise angular positioning (injection molding machine turntable drives, rotary indexing tables), this characteristic ensures positioning accuracy and repeatability.

③ High Starting Torque — Superior Heavy-Load Breakaway Capability

Starting torque reaches up to 95% of theoretical value. In winch, slew drive, and other applications requiring breakaway of high-inertia loads, the motor delivers near-theoretical maximum instantaneous torque, avoiding starting difficulties or system pressure surges.

④ High Thermal Shock Resistance and Wide Temperature Range — Adaptable to Demanding Industrial Environments

The motor exhibits high resistance to thermal shocks, with an operating temperature range of -30°C to +80°C. In injection molding, metallurgical equipment, and other applications with significant temperature fluctuations, the motor maintains stable output performance, avoiding efficiency degradation caused by thermal expansion-induced clearance changes.

⑤ Integrated Parking Brake — Simplified System Design

The MRE series includes an integrated multi-disc parking brake as standard, eliminating the need for external braking devices. In marine winches, crane slewing, and other load-holding applications, the integrated brake simplifies system piping and installation footprint.

Application Areas

• Injection molding machine turntable drives and clamping mechanisms

• Marine: Mooring winches, steerable thrusters

• Mining: Shredders, slew drives, roadheader star wheel drives

• Offshore engineering: Jack-up platform lifting systems, constant-tension mooring

• Material handling: Heavy-duty coilers, rotary tables

• Recycling industry: Shredder drives

• Oil & Gas: Drilling equipment rotary drives

Expert Maintenance Tips

Pre-Installation Inspection: Verify flatness and cleanliness of the 250 h7 mounting flange mating surface. Spline shaft-to-coupling fit must conform to DIN 5480 or DIN 5463 standards; avoid interference fits. Use bolts of strength class 8.8 or higher, tightened in diagonal sequence to specified torque.

Casing Oil Filling: Before initial start-up, the casing must be filled with clean hydraulic oil through the highest casing port. Refer to the OEM installation and maintenance manual for the MRE 1400 G casing oil capacity. Dry starting causes metal-to-metal contact in the hydrostatic oil column transmission components without lubrication, resulting in irreversible damage.

Fluid Cleanliness: Maintain system oil cleanliness at NAS 8 (ISO 4406 18/16/13) or better. The Calzoni motor’s hydrostatic oil column clearances are highly sensitive to particulate contamination; excessive contamination accelerates wear of the valve plate surface.

Scheduled Inspection: Check casing drain flow and brake clearance every 500 operating hours. The integrated brake friction discs in MRE series motors require adjustment or replacement when worn. Monitor low-speed (0.5–5 rpm) operating smoothness; if stick-slip or torque fluctuation occurs, inspect the contact condition between pistons and stator curve surfaces.

Long-Term Storage Protection: If the motor will be idle for more than 3 months, fill the casing with rust-preventive hydraulic oil and manually rotate the shaft several turns monthly to prevent corrosion of hydrostatic oil column interfaces and bearings.