HANJIU BMM Hydraulic Motor

The Ultimate Guide to OMM-Compatible Mini Orbital Hydraulic Motors from China
Factory Direct | OEM/ODM Available | Global Shipping
Published: July 2026 | Shijiazhuang Hanjiu Technology Co., Ltd. | www.hjhydraulic.com

1. What is an OMM Hydraulic Motor?

The OMM hydraulic motor is the smallest and most compact orbital hydraulic motor in the Danfoss product line, designed for applications requiring high speed, low torque, and minimal weight. The OMM series is widely recognized as the industry standard for mini hydraulic motors used in brush cutters, mowers, harvesters, and light industrial equipment.

Key characteristics of OMM motors:

· • Displacement range: 8.2 to 50.3 cm³/rev (BMM8 to BMM50)

· • Max speed: Up to 2,450 rpm (intermittent)

· • Max pressure: 20 MPa continuous / 22.5 MPa intermittent

· • Max torque: 100 Nm peak

· • Weight: Only 1.9 to 2.4 kg - extremely lightweight

· • Gerotor gear set design for compact volume and high efficiency

· • Rolling bearing design for greater lateral load capacity

· • High-pressure shaft seal for parallel/series operation

2. HANJIU BMM Series: 100% Compatible with Danfoss OMM

HANJIU BMM hydraulic motors are engineered as direct replacements for the world-renowned Danfoss OMM series, as well as M+S MM and Eaton J-Series motors. Our BMM motors deliver identical performance specifications at a fraction of the OEM cost, making them the preferred choice for distributors, repair shops, and equipment manufacturers worldwide.

Brand Cross Reference Table:

3. Complete Technical Specifications - HANJIU BMM Series

The following table provides comprehensive performance data for all BMM displacement variants:

Power & Pressure Specifications:

Flow & Weight Specifications:

4. Why HANJIU BMM Motors Outperform the Competition

✓ Gerotor Gear Set Design

Advanced Gerotor gear set provides compact volume, high power density, and low weight. The precision-manufactured gear set ensures smooth operation and extended service life.

✓ Rolling Bearing Design

Features rolling bearings that provide greater lateral load capacity compared to conventional bushing designs, making BMM motors ideal for applications with side loading.

✓ High-Pressure Shaft Seal

The shaft seal can bear high pressure of the hydraulic system, allowing motors to be used in parallel or series configurations without external drain lines.

✓ Smooth Speed Control

Direction of shaft rotation and speed can be controlled easily and smoothly across the entire operating range, from low-speed high-torque to high-speed applications.

✓ Multiple Connection Options

A variety of connection types for flange, output shaft, and oil port are available to suit different installation requirements and regional standards.

✓ Compact & Lightweight

With weights ranging from only 1.9kg to 2.4kg, BMM motors are among the lightest in their class, perfect for mobile and portable equipment.

5. Applications & Industries for BMM/OMM Motors

HANJIU BMM motors are trusted by equipment manufacturers and maintenance professionals across multiple industries:

�� Agricultural Machinery

· • Brush cutters and grass mowers

· • Harvesting equipment (small-scale)

· • Irrigation pumps and systems

· • Fertilizer spreaders

· • Mini tractors and tillers

�� Forestry Equipment

· • Wood chippers and shredders

· • Log splitters

· • Brush clearing equipment

· • Portable sawmills

�� Industrial & Manufacturing

· • Conveyor systems

· • Packaging machinery

· • Textile equipment

· • Food processing machines

· • Plastic injection molding auxiliaries

�� Marine & Water Applications

· • Ship cleaning equipment (underwater)

· • Boat winches and capstans

· • Fishing gear drives

· • Small marine thrusters

�� Construction & Municipal

· • Small concrete mixers

· • Road sweepers

· • Snow removal equipment

· • Mini excavator attachments

· • Portable power tools

�� Material Handling

· • Small forklifts and pallet trucks

· • Conveyor drives

· • Automated guided vehicles (AGV)

· • Sorting equipment

6. Why Global Distributors Choose HANJIU BMM Motors

HANJIU Technology, established in 2011 in Shijiazhuang, Hebei, China, has become a market leader in hydraulic orbital motors. Here is why our BMM series is the top choice for OMM replacements:

�� Factory Direct Pricing: Eliminate middleman markup. HANJIU manufactures BMM motors in-house with annual capacity exceeding 300,000 units, ensuring competitive wholesale pricing for distributors.

�� 100% Interchangeability: BMM motors are dimensionally and functionally identical to Danfoss OMM, M+S MM, and Eaton J-Series. No modifications required - direct bolt-on replacement.

�� Rigorous Quality Control: Every BMM motor undergoes 100% performance testing including pressure endurance, speed verification, and seal integrity checks before shipment.

�� Flexible Ordering: Minimum order quantity starts from just 1 piece for testing. Bulk orders of 100+ units receive significant volume discounts.

�� Fast Global Delivery: Standard models in stock for immediate shipment. DHL/FedEx delivery to USA/Europe in 5-7 days. Sea freight for large orders.

�� OEM & Private Label: Custom branding, packaging, and documentation available. We support your brand growth with exclusive territory agreements.

�� 24/7 Technical Support: Our engineering team provides online technical consultation, installation guidance, and troubleshooting support in English and Chinese.

7. How to Order HANJIU BMM Motors

Step-by-Step Ordering Process:

1. Identify Your Requirements: Determine displacement (BMM8/12/20/32/40/50), shaft type (16mm cylindrical or tapered), flange type (2-bolt or 3-bolt), and port configuration (G1/2 BSP or NPT).

2. Request a Quote: Contact HANJIU via our website or email with your specifications and quantity. We respond within 24 hours.

3. Sample Testing: Order 1-2 units for performance verification. We offer competitive sample pricing with fast delivery.

4. Bulk Ordering: Once satisfied, place your bulk order. Production lead time is typically 10-15 days for standard models.

5. Quality Inspection: We provide pre-shipment photos and test reports. Third-party inspection welcome.

6. Shipping & Delivery: Choose from DHL/FedEx (5-7 days), air freight (7-10 days), or sea freight (20-30 days).

8. Frequently Asked Questions (FAQ)

Q: Is HANJIU BMM really 100% compatible with Danfoss OMM?

A: Yes. HANJIU BMM motors are designed to exact Danfoss OMM dimensional and performance specifications. Mounting dimensions, shaft sizes, port threads, and performance curves are identical. No adapter plates or modifications needed.

Q: What is the warranty period?

A: HANJIU provides a 12-month standard warranty on all BMM motors. Extended warranty options available for bulk orders.

Q: Can I get custom shaft or flange configurations?

A: Absolutely. We offer OEM customization including special shaft diameters, keyways, flange patterns, and port configurations. Minimum order quantities apply for custom designs.

Q: What hydraulic fluid is recommended?

A: Mineral oil-based hydraulic fluid (HL 32 or HL 46) is recommended. Operating temperature range: -40°C to +60°C. Oil cleanliness: ISO 19/16 or better.

Q: How do I become a HANJIU distributor?

A: Contact our sales team with your company profile and target market. We offer exclusive distribution agreements for qualified partners with competitive pricing and marketing support.

Q: What is the price difference compared to Danfoss OMM?

A: HANJIU BMM motors typically cost 40-60% less than equivalent Danfoss OMM motors while delivering identical performance. Volume discounts available for orders over 100 units.

9. Contact HANJIU Technology Today

Related Product Pages:

· • BMM Hydraulic Motors (OMM Replacement) - www.hjhydraulic.com/product.html

· • Hydraulic Steering Units - www.hjhydraulic.com/hydraulic_steering_unit.html

· • Directional Control Valves - www.hjhydraulic.com/directional_valve.html

· • Product Catalogs & Downloads - www.hjhydraulic.com/download.html

· • Video Demonstrations - www.hjhydraulic.com/video.html

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