F11-019 Parker Bent-Axis Motor 19cc 350 Bar 8100 RPM

Product Overview

The F11-019 is the 19cc displacement variant of Parker’s F11 series bent-axis fixed displacement hydraulic motor. The F11 series features a 40° angle between shaft and cylinder barrel, resulting in an exceptionally compact and lightweight motor with a high power-to-weight ratio. It is designed for both open and closed loop circuits and is widely deployed in industrial and mobile hydraulic applications requiring high rotational speeds and extreme shaft loads.

This product serves as a direct OEM interchange replacement for the original Parker F11-019. Every unit undergoes 100% simulated operating condition testing before shipment, verifying displacement accuracy, pressure containment, speed response, and control characteristics against original factory specifications. The F11 series employs Parker’s unique spherical piston design with laminated piston rings, which deliver low internal leakage and thermal shock resistance. A proprietary timing gear synchronizes shaft and cylinder barrel, enabling tolerance to high G-forces and torsional vibrations. Heavy-duty roller bearings accommodate substantial external axial and radial shaft loads up to 400 kg (880 lb).

Technical Specifications

• Model: F11-019

• Displacement: 19.0 cm³/rev (1.16 in³/rev)

• Max Intermittent Pressure: 420 bar (6090 psi)

• Max Continuous Pressure: 350 bar (5075 psi)

• Max Continuous Speed: 8100 rpm

• Max Intermittent Speed: 14000 rpm

• Min Continuous Speed: 50 rpm

• Control/Function Codes: HB / JB / MB / QB / SB — various configurations for shaft, seal, and mounting options

• Mounting Flange: SAE B 2-bolt (per SAE J744) / CETOP / ISO options available

• Weight: Approx. 11 kg (24.2 lb)

• Flow @ Rated RPM: 151.4 L/min (40 gpm)

• Theoretical Torque @ 100 bar: 30.2 Nm (22.3 lb·ft)

• Radial Load Capacity: 400 kg (880 lb)

• Optimum Fluid Viscosity: 15–30 cSt (rated 8–1000 cSt)

• Seal Material: FPM (Fluorocarbon)

• Operating Temperature Range: -40°C to +115°C

Specifications sourced from Parker Service Manual Bulletin HY30-5503-M1/UK and product technical data.

Key Technical Advantages

1. Spherical Piston & Laminated Piston Ring Design — Low Leakage, High Thermal Stability

The F11-019 incorporates Parker’s distinctive spherical piston architecture paired with laminated piston rings, forming an efficient dynamic seal between piston and cylinder barrel. Compared to conventional O-ring seals, the laminated ring design substantially reduces internal leakage while delivering superior thermal shock resistance, maintaining stable volumetric efficiency even under rapid oil temperature fluctuations.

2. 40° Bent-Axis Compact Architecture — High Power-to-Weight Ratio

The 40° angle between shaft and cylinder barrel enables the F11-019 to achieve an exceptionally compact housing profile within the 19cc displacement class. At just 11 kg total weight, it delivers up to 420 bar intermittent pressure capability, offering a power-to-weight ratio that stands out among comparable products.

3. Timing Gear Synchronization — Resistance to High G-Forces & Torsional Vibration

Parker’s proprietary timing gear design precisely synchronizes the shaft and cylinder barrel, maintaining stable port timing relationships at high rotational speeds. This design provides exceptional tolerance to high G-forces and torsional vibrations, making it particularly suitable for saw drives, winches, and other applications subject to frequent shock loading.

4. Heavy-Duty Roller Bearings — High External Load Capacity

The F11-019 is equipped with heavy-duty roller bearing assemblies capable of accommodating substantial external axial and radial shaft loads. With a radial load capacity of 400 kg (880 lb), the motor can directly drive pulleys, gears, or sprockets without requiring additional independent bearing support structures, simplifying system integration.

5. 100% Simulated Operating Condition Testing — Interchangeability Assurance

Every F11-019 unit undergoes 100% inspection on test benches that replicate actual operating conditions, covering displacement verification, pressure cycling, speed response, and leakage testing. Test data is compared item-by-item against original Parker factory standards, ensuring mounting dimensions, hydraulic interfaces, and performance curves are fully interchangeable with OEM parts.

Application Areas

• Forestry Machinery: Saw drives, feller bunchers, skidders, forwarders

• Construction Equipment: Skid steer loaders, mini excavators, off-highway trucks

• Lifting & Winching: Deck cranes, constant tension winches, hatch cover drives

• Agricultural Machinery: Mowers, cutters, fan drives

• Energy & Industrial: Nitrogen pumpers, frac trucks, coil tubing units, aircraft test stands, dust collectors

Application data sourced from Parker official product pages and industry references.

Expert Maintenance Tips

Installation: The F11-019 supports SAE B 2-bolt and CETOP flange mounting. Ensure the flange face sits flush against the mounting surface and tighten bolts in a diagonal sequence to specified torque. Shaft options include SAE keyed (25mm shaft, key 8×7×35) or splined configurations. Coupling alignment deviation must not exceed 0.05mm.

Fluid Management: ISO VG 32 or VG 46 anti-wear hydraulic fluid is recommended, with an optimum viscosity range of 15–30 cSt. Before initial start-up, fill the housing with clean hydraulic fluid to prevent dry-start damage to the valve plate and piston assembly. System filtration should meet ISO 20/18/13 or better.

Speed Limitation Notes: When operating the F11-019 as a motor, self-priming speed limits apply. When rotational speed exceeds the self-priming threshold, ensure case drain pressure meets minimum requirements (refer to Parker catalog MSG30-8249/CN). A case flushing valve may be required to maintain adequate lubrication and cooling.

Periodic Inspection: Check case leakage volume every 500 operating hours. A significant increase in leakage typically indicates piston ring or valve plate wear. Inspect shaft seal condition regularly. FPM seals perform reliably from -40°C to +115°C; alternative seal materials are required outside this range.

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