35M95A-11C20 Vickers Eaton M Series Vane Motor 100.3cc 172bar

Product Overview

The 35M95A-11C20, 26M-42A-3C20, 35M115A1C20 and 35M-95A-11C-20 models belong to the Eaton Vickers (now Danfoss) M-Series high-speed, high-pressure hydraulic vane motors (25M/26M/35M series). Featuring a hydraulically balanced cartridge design with dual pressure plates, these motors achieve volumetric efficiency consistently above 90% and support high-speed operation. We specialize in the R&D and manufacturing of high-pressure pumps, motors and valve blocks. Our products offer 100% drop-in interchangeability with genuine Vickers/Eaton M-Series units and undergo 100% simulated operating-condition testing. Precision machining and high-quality materials ensure reliable high-torque output under high-pressure and high-speed conditions for industrial and mobile applications.

Technical Specifications 

(Based on official Eaton Vickers engineering data; theoretical values excluding efficiency and tolerances)

• Series: 25M/26M (standard/heavy-duty bearing), 35M/36M
• Typical models:
  • 35M95A-11C20 / 35M-95A-11C-20: Displacement 100.3 cm³/r, torque rating 10.7 Nm/6.9 bar (95 lb.in/100 psi), splined shaft, cover ports in line
  • 35M115A1C20: Displacement 121.9 cm³/r, torque rating 13.0 Nm/6.9 bar (115 lb.in/100 psi), keyed shaft, cover ports in line
  • 26M-42A-3C20: Displacement approx. 43.9 cm³/r (corresponding to 25M/26M 42 ring), heavy-duty bearing version
• Continuous pressure: approx. 155 bar (2250 psi)
• Peak/intermittent pressure: 172 bar (2500 psi)
• Maximum speed: approx. 3000 r/min @ 172 bar for 35M series; higher (up to 3600–4000 r/min at lower pressure) for 25M/26M series
• Control: Fixed displacement, bi-rotational (reverse by reversing inlet flow), externally drained
• Mounting & ports: A = SAE 2-bolt mounting flange + SAE 4-bolt flange ports; Shaft 1 = keyed, 11 = splined; Cover position C = ports in line
• Approximate weight: 29 kg for 35M series
• Other: Dual pressure plates for low internal leakage; hydraulically balanced radial loads

Key Technical Advantages

1. Hydraulically balanced cartridge and dual pressure-plate precision design: Symmetrical inlet chambers fully cancel radial forces, significantly reducing bearing and friction-pair loads. High starting torque and volumetric efficiency stably above 90%.
2. High volumetric efficiency and low-noise high-speed operation: Optimized vane, cam-ring and pressure-plate geometry minimizes internal leakage, supporting high-speed running with smooth, quiet performance.
3. Heavy-duty bearing options and long service life: 26M series incorporates heavy-duty bearings for superior shock resistance and continuous heavy-load capability. Premium bearings and seals extend overall life.
4. 100% drop-in interchangeability and simulated-condition testing: Overall dimensions, mounting interfaces, shaft types, port positions and performance curves match genuine Vickers/Eaton units exactly for direct replacement. Every unit undergoes 100% simulated operating-condition testing to verify pressure, speed, torque and sealing performance.
5. Flexible shaft and mounting configurations: Keyed or splined shafts and multiple cover-port orientations allow easy adaptation to diverse machine layouts.

Application Areas

• Construction and agricultural machinery: scraper drives, auxiliary travel, winches and hoists
• Industrial hydraulic systems: conveyor drives, hydraulic winches, test stands and specialized equipment main/auxiliary drives
• Marine and port equipment: fishing trawler winches, anchor windlass auxiliaries, deck machinery
• Mobile equipment and special vehicles: hydrostatic drive auxiliary circuits and high-torque high-speed applications

Expert Maintenance Tips

• Before installation, carefully verify the shaft type (1/11) and cover position (C etc.) in the model code to ensure exact match with the host machine. Torque flange bolts to SAE specifications to avoid misalignment loads.
• Use hydraulic oil with cleanliness of NAS 7 or better; maintain operating viscosity in the 20–100 cSt range. Run at low speed and low pressure during cold starts until oil reaches normal temperature.
• Keep the external drain line free-flowing to prevent excessive case pressure that can damage shaft seals. Monitor case temperature and unusual noise during operation; inspect vane and seal wear promptly.
• Reverse rotation simply by switching inlet flow direction—no mechanical adjustment is required. Avoid prolonged operation beyond rated pressure or speed.
• Perform preventive maintenance every 2000–4000 hours depending on duty cycle: replace shaft seals and check cartridge component condition.