KC38 Danfoss K Frame Variable Cartridge Motor 38cc 350bar

Product Overview

The Danfoss KC38 (and KC45) is a Danfoss K Frame series variable-displacement axial piston hydraulic motor (cartridge type) of swash-plate design for low- to medium-power two-position variable applications with an integral servo piston. Displacement is 38 cm³/rev for KC38 (45 cm³/rev for KC45), with continuous pressure up to approximately 260 bar and peak up to 350 bar, and maximum speeds around 2800 rpm. Our KC38CNERNFF10SNNAFF18NNNNNN, KC45DNERNFF07SNNAFF18NNNNNN and related codes are manufactured to original technical specifications, offering 100% interchangeability (flange, shaft end, ports, and control interfaces fully match OEM) and 100% simulated-duty testing. They deliver reliable performance in closed-circuit propel applications as cost-effective direct replacements for genuine Danfoss motors.

Technical Specifications 

• Models: KC38CNERNFF10SNNAFF18NNNNNN; KC45DNERNFF07SNNAFF18NNNNNN
• Displacement: KC38 38 cm³/rev; KC45 45 cm³/rev
• Continuous pressure: up to approx. 260 bar (KC38); approx. 210 bar (KC45)
• Peak pressure: up to 350 bar (KC38); approx. 300 bar (KC45)
• Maximum speed: approx. 2800 rpm
• Minimum speed: approx. 500 rpm
• Control: Hydraulic single-line control (S), two-position variable (max/min displacement limiters)
• Mounting: Cartridge type
• Approx. weight: 15.4 kg
• Design: Swash-plate variable axial piston motor, bidirectional, for closed circuits

Key Technical Advantages

1. Precision swash-plate piston design with integral servo piston delivers fast response and reliable two-position displacement switching with high efficiency.
2. Compact cartridge design facilitates integration into gearboxes or other transmission systems, providing high power density in limited space.
3. High-strength bearings and optimized sealing support continuous medium-power duty with long service life and high reliability.
4. Full dimensional and performance interchangeability plus rigorous simulated-duty testing guarantee drop-in replacement of original Danfoss units, minimizing downtime and lifecycle costs.

Application Areas

Suitable for low to medium power closed-circuit hydrostatic transmissions in compact construction equipment, agricultural machinery, forestry equipment, material handling, and industrial drive systems for propel or work functions.

Expert Maintenance Tips

• Verify exact match of cartridge flange, shaft end, and ports before installation; ensure the housing remains filled with hydraulic fluid at all times.
• Use recommended cleanliness and viscosity hydraulic fluid; regularly check control pressure and displacement limiter settings.
• Monitor speed, pressure, and temperature during commissioning; avoid prolonged over-pressure operation.
• Use matching seals during service; record operating parameters to detect early efficiency decline.