Danfoss OMT Series Hydraulic Motor | OMT315 151B3003 OMT400 151B3004 | Drilling Machine Motor

The OMT Series heavy-duty orbital hydraulic motors by Chengyuan Hydraulic are precision power components fully compatible with Danfoss industrial standards. This range, featuring core models such as OMT315 (151B3003) and OMT400 (151B3004), utilizes advanced disc valve technology for superior torque density. Engineered specifically for drilling machines, anchoring rigs, and heavy construction equipment, the OMT series excels in providing consistent performance under high-pressure and shock-load conditions. Every Chengyuan OMT motor undergoes 100% simulated load testing to guarantee 100% original-place interchangeability in terms of technical performance and mounting geometry.

Technical Specifications :

• Core Models: OMT315, OMT400, OMT500

• Part Numbers: 151B3003, 151B0363, 151B3004

• Displacement (OMT315): $314.5\text{ cm}^3/\text{rev}$

• Displacement (OMT400): $400.9\text{ cm}^3/\text{rev}$

• Max Continuous Pressure: $20\text{ MPa (200 bar / 2900 psi)}$

• Max Peak Pressure: $24\text{ MPa (240 bar / 3480 psi)}$

• Max Continuous Torque (OMT400): $1080\text{ N}\cdot\text{m}$

• Max Continuous Speed (OMT315): $200\text{ rpm}$

• Distribution Type: Disc Valve (automatic wear compensation)

• Weight: Approx. $20\text{ kg}$

Key Technical Advantages:

• Advanced Disc Valve Distribution: The distribution disc is mechanically linked to the rotor, providing automatic compensation for wear under operating pressure. This ensures peak volumetric efficiency throughout the motor’s lifespan and delivers smooth, stable torque even at ultra-low speeds—critical for drilling precision.

• Heavy-Duty Tapered Roller Bearings: The output shaft is supported by large-scale tapered roller bearings capable of handling significant radial and axial loads. In drilling applications, this allows the motor to drive heavy loads directly without auxiliary bearings, simplifying machine design.

• Reinforced High-Pressure Shaft Seal: Equipped with premium high-pressure seal kits, the OMT motor can operate under high backpressure, often eliminating the need for a drain line in specific configurations while ensuring zero external leakage.

• Precision-Ground Geroler Set: The rotor-stator set is manufactured from hardened alloy steel with high-precision grinding. This results in a very low starting pressure and excellent anti-friction properties, extending service life during frequent stop-start cycles under load.

Application Areas:

• Drilling Machinery: Water well rigs, rotary drilling rigs, and coal mine roof bolters.

• Construction Equipment: Heavy-duty winches, road milling machines, and screening plants.

• Agriculture & Forestry: Combine harvester drives and high-power wood chippers.

Expert Maintenance Tips:

• Drain Line Configuration: For high-impact drilling applications, it is highly recommended to connect the case drain line. This maintains stable internal pressure and helps dissipate frictional heat, significantly extending shaft seal life.

• Initial Start-Up Procedure: Before the first run, the motor case must be filled with hydraulic oil. We recommend running the motor at $30\%$ of its max speed under low load for the first $15$ minutes to ensure proper mechanical seating of internal parts.

• Viscosity & Temperature Monitoring: Maintain oil viscosity between $20\text{ and } 75\text{ mm}^2/\text{s}$. If oil temperature exceeds 80°C, internal efficiency will drop; inspect the cooling system to prevent premature wear.