112A-071-AT-0F Parker Nichols Motor 116cc 210 bar LSHT

Product Overview

The 112A-071-AT-0F is a compact low-speed, high-torque (LSHT) orbital hydraulic motor in Parker’s Nichols™ 110A Series (IGR Series). The series features a pressure-loaded power element design in which hydraulic pressure continuously biases the distribution element against internal leakage paths for high volumetric efficiency. The design is wear-compensated — volumetric efficiency never degrades even as the motor approaches the end of its service life. The output shaft uses a unique one-piece solid fixed-axis design that enables full stationary spline contact between shaft and rotor, minimizing spline contact stresses.

The 112A-071-AT-0F is a 100% drop-in replacement for Parker Nichols 110A/112A series motors, matching mounting flanges, shaft specifications, and port configurations exactly. Compatible part numbers include 112A-071-AT-0, 112A-071-AM-0-R1-F, and 112A-036-AT-0. The shaft can be extended through the rear cover for mounting parking brakes, auxiliary drive functions, or encoders for speed readout or closed-loop control. Every unit undergoes 100% simulated load testing before shipment.

Technical Specifications 

• Model: 112A-071-AT-0F

• Brand Series: Parker Nichols™ 110A Series (IGR Series)

• Displacement Code: 071

• Geometric Displacement: 116 cm³/rev (7.1 in³/rev)

• Intermittent Pressure: 3000 psi (approx. 207 bar)

• Continuous Pressure: Approx. 170 bar (based on 110A series range 120–170 bar)

• Max Intermittent Torque: 6700 lb-in (approx. 757 N·m)

• Max Continuous Torque: 5215 lb-in (approx. 589 N·m)

• Max Side Load: 1000 lb (approx. 4,448 N)

• Control Type: Orbital power element, pressure-loaded distribution, wear-compensated

• Shaft Type: Cylindrical Ø25 mm (1 inch), parallel key, stainless steel

• Mounting Flange: SAE A 2-bolt, pilot Ø82.5 mm

• Port Size: G 1/2 BSPP (side ported)

• Rotation: Bi-directional

• Weight: Approx. 7.95 kg

Key Technical Advantages

1. Pressure-Loaded Distribution with Wear Compensation

The core technology of the 110A Series is its pressure-loaded power element design — hydraulic pressure continuously biases the distribution element against the rotor face, creating a self-sealing effect that dramatically reduces internal leakage. The distribution face is also wear-compensated: even after extended operation, the clearance does not increase with wear, and volumetric efficiency remains constant throughout the motor’s service life. This characteristic is critically valuable for travel-drive and continuous-duty applications requiring long-term stable output.

2. One-Piece Solid Fixed-Axis Design with Low Stress

The 112A-071-AT-0F uses Parker’s exclusive one-piece solid fixed-axis shaft, replacing the torque-transfer link used in conventional orbital motors. This design creates full stationary spline contact between shaft and rotor, eliminating the spline sliding and alternating stresses present in conventional torque link structures, and significantly reducing spline contact stresses. The solid shaft also provides higher torsional stiffness and superior impact resistance under frequent start-stop and reversing duty.

3. Compact Structure with Exceptional Power Density

The Nichols™ 110A Series is one of the most compact LSHT hydraulic motors in its class. The 112A-071-AT-0F delivers up to 589 N·m of continuous torque within a body length of only 6.6 inches, achieving class-leading power density. This makes it ideally suited for travel-drive, attachment-drive, and compact transmission systems with limited installation space.

4. Thru-Shaft Design for Brake and Encoder Integration

The output shaft of the 112A-071-AT-0F can extend through the rear cover, supporting the mounting of parking brakes, auxiliary drive functions, or speed encoders. This thru-shaft design provides exceptional flexibility for system integration, enabling braking, auxiliary drive, or closed-loop speed control without additional transmission interfaces.

5. 100% Simulated Load Testing

Every 112A-071-AT-0F is validated on a 100% simulated load test bench before shipment. Testing protocols cover continuous operation at rated pressure, cyclic intermittent pressure loading, peak torque output, and internal leakage measurement, ensuring delivered performance matches published specifications.

Application Areas

• Material Handling: Forklift attachment drives, conveyor drives, light-duty winches

• Agricultural Machinery: Mower blade drives, seeder drives, irrigation equipment

• Turf & Municipal Equipment: Zero-turn radius mower drives, golf course maintenance equipment

• Industrial Equipment: Machine tool feed drives, cleaning equipment rotary drives, mixing equipment

• Marine & Offshore: Deck machinery drives, net hauling winch drives

• Specialty Vehicles: Aerial work platform attachment drives, snow removal auxiliary drives

Expert Maintenance Tips

Pre-Installation Checklist: Verify system oil cleanliness meets ISO 18/13. Use a return filter rated at 10 μm or finer. Ensure the SAE A 2-bolt flange pilot Ø82.5 mm fits flush against the mounting surface. Tighten bolts in a diagonal sequence. Confirm proper fit between the Ø25 mm shaft and coupling.

Thru-Shaft Application Notes: When using the thru-shaft function for brake or encoder mounting, verify the rear cover thru-shaft seal integrity and confirm that the radial and axial loads of the attached device are within the shaft end allowable limits. If the rear cover thru-shaft seal is damaged, the entire rear cover assembly (P/N 2725) must be replaced.

Break-In Procedure: Before full-load operation, run new or overhauled motors at no more than 30% of continuous ratings for at least 30 minutes. This allows the power element and distribution face to achieve optimal mating surfaces.

Fluid Management: Use 68# anti-wear hydraulic oil with working viscosity maintained at 37–73 cSt. Normal operating oil temperature should be 20–60°C. Monitor oil cleanliness regularly; replace hydraulic fluid and clean filters immediately when contamination exceeds ISO 19/16.

Long-Term Storage: For storage exceeding 3 months, fill the motor interior with clean hydraulic oil and plug all ports to prevent internal corrosion. Before recommissioning, manually rotate the shaft to confirm free movement without binding.