Durable KC38 Hydraulic Motor 350bar High Pressure For Light Construction Equipment
Wuhan Xinlaifu Hydraulic Equipment Co., Ltd. is one of the leading manufacturers and suppliers of durable kc38 hydraulic motor 350bar high pressure for light construction equipment in China. With abundant experience, we warmly welcome you to buy high quality customized products at competitive price from our factory. Also, OEM&ODM service is available.
Specifications
| Type | KC Series (2-position Variable Axial Piston Motor) |
| Brand | XLF Hydraulic |
| Displacement | 38.0 / 45.0 cm³/r |
| Rated Working Pressure | 350 / 300 bar |
| Intermittent Peak Pressure | 400 / 400 bar |
| Mount Flange | SAE B (Cartridge Style, Planetary Gearbox Compatible) |
| Port Size | SAE O-ring Ports (Multiple Standard Sizes: FF06/07/08/09/11 etc.) |
| Built-in Parts | Built-in closed-circuit flush valve, optional speed sensor |
| Recommended Oil | Mineral/synthetic anti-wear hydraulic oil |
Product Overview
Designed as a drop-in aftermarket replacement for Danfoss KC Series motors, this two-position variable axial piston motor adopts an optimized swash-plate structure with a 9-piston rotating assembly. With a maximum swash plate angle of 18°, it delivers a precise 3.4:1 maximum-to-minimum displacement ratio, ensuring stable high-pressure operation, consistent torque output and reliable speed performance. It features extremely low flow pulsation and excellent volumetric efficiency, minimizing energy loss and maximizing system performance.
Built with a robust one-piece gasket-free housing and heavy-duty tapered roller bearings, this cartridge-style motor is fully compatible with standard planetary gearboxes, making it ideal for compact wheel drive applications. Engineered to withstand the harshest construction site conditions, its leak-proof one-piece housing reduces failure risks and extends service life. Featuring standard hydraulic two-position variable control, it comes with built-in closed-circuit flush valves and optional speed sensors to meet diverse system requirements, ensuring consistent performance even in demanding environments.
This high-performance motor is widely used in both open and closed-circuit hydraulic drive systems for construction machinery. It is the ideal travel motor solution for aerial work platforms, road rollers, mini excavators, mobile cranes and various other mobile construction equipment requiring reliable wheel drive power.
Core Advantages
1. Integrated Structure Design - An Ideal Choice For Integrated Drive & Electrified Systems
Danfoss KC Series (KC38 & KC45) 2-position variable axial piston hydraulic motor features a premium one-piece leak-proof integrated structure, specially developed for integrated wheel drive and electrified hydraulic systems with open or closed circuits.
Diversified reinforced shaft configuration: This motor provides two mainstream output options, including 15-tooth spline shafts and standard straight key shafts. The high-strength shaft assembly can steadily withstand operational radial loads, and the use of flexible couplings is recommended to prolong the service life of the entire drive system. Seamless combination with planetary gearboxes: Designed as a professional cartridge motor, it can be directly mounted to planetary wheel drive gearboxes without additional connectors, becoming an ideal core component for modern electrified mobile hydraulic modules. Ultra-compact layout: The streamlined one-piece housing minimizes overall dimensions, which is highly suitable for compact wheel drive systems where installation space is strictly limited. User-friendly installation & piping: Fitted with industry-standard SAE B mounting flanges and multiple SAE O-ring boss ports (FF series specifications), together with a scientific multi-bolt fixing structure, it ensures perfect assembly concentricity and stable operation. The centralized port design simplifies on-site piping, and the flexible structural design adapts to various drive schemes of off-highway machinery, bringing greater flexibility to your hydraulic system configuration.
2. KC Series - High Performance 2-Position Variable Axial Piston Hydraulic Motor
As a flagship high-performance product of Danfoss, the KC Series axial piston hydraulic motor is specially designed for open and closed hydraulic circuits in mobile construction machinery.
Excellent power density: Despite its compact housing, this motor outputs steady and powerful torque. The KC38 model supports 350 bar continuous working pressure, the KC45 model supports 300 bar continuous working pressure, and the peak pressure of both models reaches 400 bar to cope with heavy-load operations. Reliable swash-plate & 9-piston structure: Adopting a mature two-position swash-plate variable structure and a durable 9-piston rotating group, the motor delivers high mechanical efficiency and runs stably in harsh construction environments. Optimized flow system: The refined internal flow channel keeps high volumetric efficiency during long-time service and cuts down pressure loss effectively. Combined with flow-optimized end caps, it achieves ultra-low flow pulsation for smoother equipment operation. Strong environmental adaptability: This two-position variable motor uses spring bias to stay at maximum displacement with a fixed 3.4:1 displacement ratio, realizing stable and rapid displacement switching. It is free from vulnerable electrical control components and needs no IP protection. Compatible with standard mineral hydraulic oil and anti-wear hydraulic oil, it serves as a reliable drive component for aerial work platforms, road rollers, mini excavators and mobile cranes. It is configured with standard hydraulic two-position control, built-in closed-circuit flush valves, and optional speed sensors, fully meeting the matching requirements of different hydraulic systems.
1. Can you provide quality certification for Danfoss hydraulic pumps and motors?
Yes. We can supply formal test reports and actual running test videos for all Danfoss hydraulic pumps and motors to verify product performance and
quality.
2. Are your Danfoss parts original new products?
All items are 100% brand new original genuine parts. A large number of mainstream models are available in stock for fast delivery.
3. Can you adjust stock units to fit my working condition?
Sure. We can modify in-stock Danfoss pumps or motors according to your site parameters to achieve perfect matching and normal operation.
4. Do you support discontinued Danfoss model replacement service?
We offer professional matching selection scheme and compatible replacement solution for obsolete stopped production models.
5. How fast can I get my ordered hydraulic components?
In-stock models can be shipped out within short time. Custom modified products will be finished and delivered efficiently.
6. Is it hard to replace old Danfoss hydraulic motor or pump?
We will recommend the most compatible replacement model and offer technical guidance for easy installation and replacement.
7. What guarantee can you offer on product stability?
All original parts own stable performance. Complete test data and videos can be provided before shipment for your confirmation.
8. Can you help me confirm the correct model for my machine?
We support professional model selection, stock modification and discontinued model upgrade solution to meet your equipment demands.
Main Specifications
KC38CNERNFF06SNNAFF18NNNNNN
KC38CNERNFF08SNNAFF18NNNNNN
KC38CNERNFFOGSNNAFF18NNNNNN
KC38CNERNFF11SNNAFF18NNNNNN
KC38CNERNFF07SNNAFF18NNNNNN
KC45DNFRNFF0SNNAFF18
KC45DNERNFF55SNNAFF18NNNNNN
KC45DNERNFFO7SNNAFF18NNNNNN
KC45DNERNFFOSSNNAFF1SNNNNNN
KC45DNERNFF55SNNAFF18NNNNN
KC45DNFRNFF00SNNAFF18NNNNN
KC38CNERNFF09SNNAFF18NNNNN
1. General Introduction
All models extracted belong to Danfoss L/K Series 2-position Variable Displacement Axial Piston Hydraulic Motors, which are cartridge-type hydraulic components widely used in construction machinery (aerial work platforms, cranes, road rollers, mini excavators). The product is divided into two main families: KC38 (38 cc/rev) and KC45 (45 cc/rev). The suffix letters and numbers represent custom configurations (shaft type, port size, seal, flush valve, mounting etc.)
2. Universal Core Specifications (KC38 & KC45 Full Series)
2.1 Basic Structure & Displacement
| Item | KC38 Series | KC45 Series |
|---|---|---|
| Product Type | 2-position Variable Axial Piston Motor | 2-position Variable Axial Piston Motor |
| Mounting Style | Cartridge (match planetary gearbox), SAE-B Flange | Cartridge (match planetary gearbox), SAE-B Flange |
| Nominal Displacement | 38 cm³/r (2.32 in³/r) | 45 cm³/r (2.75 in³/r) |
| Displacement Control | Spring biased to max displacement, hydraulically shifted to min displacement | Spring biased to max displacement, hydraulically shifted to min displacement |
| Displacement Ratio | 3.4:1 | 3.4:1 |
| Rotation | Bi-directional | Bi-directional |
| Piston Group | 9-piston rotating group, Max swash plate angle: 18° | 9-piston rotating group, Max swash plate angle: 18° |
2.2 Pressure Ratings
| Item | KC38 Series | KC45 Series |
|---|---|---|
| Continuous Rated Pressure | 350 bar (5075 psi) | 300 bar (4350 psi) |
| Peak Intermittent Pressure | 400 bar (5800 psi) | 400 bar (5800 psi) |
| Circuit Application | Open / Closed Hydraulic Circuit | Open / Closed Hydraulic Circuit |
2.3 Speed & Torque
| Item | KC38 Series | KC45 Series |
|---|---|---|
| Max Speed @ Full Displacement | 3600 rpm | 3500 rpm |
| Max Speed @ Min Displacement | 4100 rpm | 4000 rpm |
| Max Output Torque | 125 N·m | 150 N·m |
2.4 Fluid & Ambient Requirements
Applicable Fluid: Standard mineral hydraulic oil, anti-wear hydraulic oil, biodegradable hydraulic fluid (optional);
Operating Fluid Temperature: -20℃ ~ +90℃ (Max transient temperature: 110℃);
Fluid Viscosity: Normal operation: 16 ~ 100 mm²/s; Cold start: ≤ 400 mm²/s;
Filtration Requirement: System filter accuracy ≥ 10 μm for extended service life.
2.5 Physical Data
Overall Dimension: Uniform housing for full series;
Weight: SAE-B flange type: 15.4 kg; Cartridge type: 14.8 kg;
Structure Feature: Three clean mounting sides, centralized port design for easy piping and installation.
2.6 Suffix Code Explanation (Corresponding to Extracted Models)
FF+Number: SAE standard hydraulic port code (FF06/FF07/FF08/FF09/FF11 for different port dimensions);
SNNAFF18: Standard seal assembly + built-in flush valve; FF18 = closed loop flush port;
NNNNNN / NNNNN: No optional accessories (No speed sensor, special end cover or anti-corrosion coating);
CN / DN: Housing code (CN = Standard housing for KC38; DN = Standard housing for KC45);
ERN / FRN: Output shaft code (ERN = 15-tooth spline shaft; FRN = Standard straight key shaft).
3. Specification Notes for Extracted Individual Models
KC38CNERNFF Series (06/07/08/09/11/OG) All models share identical hydraulic performance. Only the hydraulic port size varies by suffix number. Main application: Wheel drive systems of light-duty aerial work platforms and small cranes.
KC45DNERNFF & KC45DNFRNFF Series ERN = Spline output shaft; FRN = Straight key output shaft. Suffix 55/0/00/OS/S stand for minor changes of port and end cover. Core pressure, speed and torque remain unchanged. Main application: Road rollers and mini excavator travel mechanisms.
Short model KC45DNFRNFF0SNNAFF18: Simplified coding without redundant positioning codes, basic performance is fully consistent with long-coded models.
4. Product Features & Advantages
High volumetric efficiency, low noise operation; Heavy-duty tapered roller bearings for long service life;
Integrated servo piston ensures smooth displacement switching and shock-free start/stop;
One-piece housing without gaskets, low internal leakage and excellent sealing performance;
Optional speed sensor and loop flush valve, compatible with various electro-hydraulic control systems;
Standard global interface, strong interchangeability and support for OEM customization[38][48].
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