112A-071-AT-O-S Parker 110A Series LSHT Orbit Motor

Product Overview

The 112A-071-AT-O-S, 112A-106-AT-O-S and 112A-164-AT-O-S models belong to the Parker 110A / 111A / 112A / 113A / 115A / 116A Series Low Speed High Torque (LSHT) orbital hydraulic motors (Nichols / Torqmotor family). Featuring a pressure-loaded power element and fixed-axis shaft design, these motors deliver high torque, superior volumetric efficiency and compact installation for medium-duty applications. They offer excellent starting torque, smooth low-speed operation, high mechanical efficiency and wear compensation. Fully interchangeable with original Parker 110A–116A Series units, they are validated under simulated operating conditions for reliable performance in agricultural, construction and industrial hydraulic systems.

Technical Specifications 

• Models: 112A-071-AT-O-S / 112A-106-AT-O-S / 112A-164-AT-O-S (Parker 110A Series family)
• 112A-071 Geometric Displacement: 116 cm³/rev (7.1 in³/rev)
• 112A-106 Geometric Displacement: 174 cm³/rev (10.6 in³/rev)
• 112A-164 Geometric Displacement: 269 cm³/rev (16.4 in³/rev)
• Continuous Maximum Pressure Drop: 172 bar (2500 psid)
• Intermittent Maximum Pressure Drop: 207 bar (3000 psid)
• Continuous Maximum Torque: approx. 470 Nm (4164 lb-in)
• Intermittent Maximum Torque: approx. 589 Nm (5215 lb-in)
• Maximum Speed: 858 rpm
• Maximum Flow: 113.6 L/min (30 gpm)
• Control Type: Open-circuit orbital motor (no integral control valves)
• Mounting Example: SAE A 2-bolt flange
• Shaft Example: Cylindrical or other available options
• Side Load Capacity: up to approx. 6450 N at key
• Approximate Weight: 4.5–8 kg (configuration-dependent)

Key Technical Advantages

1. Pressure-loaded power element design achieves high volumetric efficiency with wear compensation, ensuring efficiency does not degrade over time.
2. One-piece solid fixed-axis shaft provides full-length stationary spline contact, minimizing contact stresses while allowing rear extension for brakes or encoders.
3. Low internal pressure drop delivers high mechanical efficiency and greater flow capability, ideal for compact high-power-density applications.
4. Precision-machined rotor set and valving ensure quiet, smooth low-speed operation and high starting torque for frequent start-stop duty.
5. Multiple flange, shaft and port configurations support full drop-in interchangeability with major brand equivalents.

Application Areas

Agricultural machinery (chain drives, conveyors), vehicle propulsion systems, winches and hoists, augers, scissor lifts, material handling equipment, and light construction machinery for drive or rotation functions.

Expert Maintenance Tips

Ensure precise flange alignment and keep side loads within rated limits during installation. Use anti-wear hydraulic oil with operating viscosity of 20–43 cSt and maintain appropriate temperature. Fully bleed the system and run at light load for initial break-in. Regularly inspect the shaft seal and fluid cleanliness (10–25 μm filtration recommended). Avoid prolonged operation above intermittent pressure ratings. In case of unusual noise or torque loss, first check system contamination and fluid condition. Use genuine Parker seal kits for service.