M5BF1 018 1R00 B1MX Parker Denison Vane Motor 18 ml/rev 320 bar

Product Overview

The M5BF1 018 1R00 B1MX (OEM part number 054-35319-0) is a high-performance fixed-displacement vane motor from the Parker Denison (formerly Denison Hydraulics) M5 series. Featuring an internal-drain design (M5BF1), it is engineered for severe-duty applications requiring high pressure, high speed, and reliable operation with low-lubricity fluids. It utilizes a patented 12-vane cartridge design that delivers outstanding volumetric efficiency and starting torque. Fully interchangeable with genuine Parker Denison units, this motor enables direct drop-in replacement without any modification to mounting interfaces or piping. Every unit undergoes 100% simulated operating-condition testing to ensure consistent performance and reliability in demanding industrial and mobile environments.

Technical Specifications 

• Model: M5BF1 018 1R00 B1MX (OEM P/N 054-35319-0)
• Displacement: 18.0 ml/rev (cm³/rev)
• Continuous / Rated Pressure: up to approx. 290 bar
• Intermittent / Peak Pressure: up to 320 bar (M5B* 012–036 series)
• Maximum Speed: intermittent up to 6000 rpm, continuous approx. 4000 rpm
• Theoretical Torque: 0.286 Nm/bar
• Control / Rotation: Fixed displacement, unidirectional clockwise (R) with anti-cavitation check valve, internal drain (no external drain port, code X)
• Shaft Type: 1 = keyed taper (non-SAE)
• Mounting: Special 2-bolt flange, pilot Ø135 mm (fan-drive optimized)
• Ports: SAE ¾” 4-bolt flange (metric thread)
• Seals: Buna-N (standard)
• Weight: approx. 18.5 kg
• Brand / Series: Parker Denison M5BF1 fixed-displacement vane motor

Key Technical Advantages

1. Patented 12-Vane Cartridge Design: Advanced cam-ring profile and dual torque cycles per revolution minimize torque ripple (typically ~1.5%), ensuring smooth output even at low speeds while achieving very low noise levels across the entire operating range.
2. High Volumetric Efficiency & Pressure Capability: Optimized for harsh conditions, supporting intermittent pressures up to 320 bar. Maintains stable long-term performance even with low-lubricity fluids and delivers high starting torque without pressure overshoots or instantaneous power spikes.
3. Internal Drain & Anti-Cavitation Features: The M5BF1 internal-drain configuration simplifies the hydraulic circuit. The unidirectional version incorporates an integrated check valve that enables smooth dynamic braking, effectively prevents cavitation, and enhances system reliability and service life.
4. Robust Bearing & Shaft System: High-capacity double ball bearings support substantial radial and axial loads. The stiff taper keyed shaft allows direct mounting of fan blades or pulleys in compact, high-vibration installations.
5. True Interchangeability & Serviceability: Completely interchangeable rotating groups enable rapid cartridge replacement for different displacements or worn components, significantly reducing downtime and maintenance costs.

Application Areas:

• Cooling fan drives on construction and agricultural machinery
• Compressor, mixer, and shredder drives in industrial hydraulic systems
• Mobile equipment generator sets and hydraulic cooling packages
• Paper, metallurgy, and other fixed installations requiring high starting torque and low noise
• Any high-pressure application needing internal drain and direct shaft mounting

Expert Maintenance Tips

1. Ensure clean, properly aligned flange faces during installation. Always use a castle nut and cotter pin at the specified torque on the taper shaft (mandatory for clockwise service) to prevent loosening.
2. Use anti-wear mineral oil of appropriate viscosity (refer to official Parker Denison recommendations). Maintain system cleanliness at ISO 18/16/13 or better; thoroughly bleed air before initial start-up.
3. Internal-drain models have no external case drain—verify free return flow to prevent excessive case pressure. Periodically inspect bearings and seals; respect radial load limits.
4. Prefer complete cartridge-group replacement rather than individual vanes to preserve alignment and efficiency. Store long-term units in a dry, corrosion-protected environment and rotate the shaft periodically.