Shijiazhuang Laiye Import& Export Trading Co., Ltd. is one of the leading manufacturers and suppliers of bm5 series — high-pressure gerotor motor in China, also supports customized service. If you're going to wholesale high quality bm5 series — high-pressure gerotor motor made in China, welcome to get pricelist from our factory.
Product Overview
The BM5 is a high-pressure gerotor motor. Feed it oil, it turns. Inside, a disc valve distributes oil to the gerotor set. The gerotor rotates. The shaft turns.
It is built for systems that run at high pressure. Up to 28 MPa intermittent. That is significantly higher than standard gerotor motors.
The disc valve design is the key. It uses end-face distribution. Oil enters through the end face of the valve. This gives smooth, steady rotation even at low speeds. No jerking. No chattering.
The distribution mechanism also compensates for wear. As the motor runs, parts wear slightly. The valve adjusts automatically. Efficiency stays consistent over time. You do not lose performance as the motor ages.
The bearings are double-row tapered rollers. They handle heavy radial loads. Side loads that would damage other motors do not bother the BM5. The shaft stays stable.
The shaft seal handles high backpressure. Up to 10 MPa. Run motors in series. Run them in parallel. The seal holds.
Reversing is simple. Swap the lines. The motor spins the other way.
We offer different flanges, shafts, and ports. The BM5 Series - High-Pressure Gerotor Motor can be configured to match your machine.
What Makes It Different
The BM5 is built for high-pressure work. Here is what sets it apart.
End-face distribution. The oil enters through the end face. This design keeps the motor smooth at low speeds. No jerking. No chattering.
Automatic wear compensation. The distribution mechanism adjusts itself as it wears. Most motors lose efficiency over time. The BM5 stays consistent.
Double-row tapered roller bearings. Handles heavy side loads. The shaft stays stable.
High-pressure capability. Intermittent pressure up to 28 MPa.
High backpressure capability. The shaft seal holds up to 10 MPa. Run motors in series or parallel.
Multiple options. Flanges, shafts, ports-we have variations. Tell us what you need.
Specifications
| Parameter | Value |
|---|---|
| Series | BM5 |
| Displacement range | 80 - 500 cc/rev |
| Max. intermittent pressure | 28 MPa |
| Max. continuous pressure | 17.5 MPa |
| Max. intermittent torque | Up to 860 N·M |
| Max. working temperature | 80°C |
| Max. back pressure | 10 MPa (recommended ≤5 MPa) |
| Recommended fluid | 68# anti-wear hydraulic oil |
| Recommended viscosity | 37 - 73 cSt |
Mounting and Connection Dimensions
Shaft Options
The BM5 is available with various output shaft configurations. Standard rotation direction: When port A is pressurized, the shaft rotates clockwise (viewed from shaft end). Reverse rotation is achieved by reversing the oil flow.
Spline Data
Tooth count: 12
Pressure angle: 30°
Diametral pitch: 12/24
Pitch diameter: 25.4 mm
Tip diameter: 26.7 mm
Root diameter: 22.057-22.352 mm
Pin diameter: 2.794 mm
Pin spacing: 29.3 mm
Dimensions
| Displacement (cc/rev) | 80 | 100 | 125 | 160 | 200 | 250 | 315 | 400 | 500 |
|---|---|---|---|---|---|---|---|---|---|
| L (mm) | 14.5 | 18 | 22.5 | 28.8 | 35.5 | 44.6 | 55 | 72 | 86.5 |
| L2 (mm) | 142.5 | 146 | 150.5 | 156.8 | 163.5 | 172.5 | 183 | 200 | 214.5 |
| L3 (mm) | 134.5 | 138 | 142.5 | 148.8 | 155.5 | 164.5 | 175 | 195 | 199.5 |
5. Where You Use These Motors
The BM5 is for high-pressure work. Here is where it shows up.
Excavators and loaders. High-pressure systems. The motor handles the pressure.
High-pressure presses. Continuous operation. The motor keeps running.
Test rigs. You need controlled rotary power under pressure. This motor delivers.
Marine deck machinery. Winches and steering systems. High pressure, high reliability.
Mining equipment. Conveyor drives and crushers. Heavy work, high pressure.
If your system runs at high pressure, the BM5 Series - High-Pressure Gerotor Motor is the right choice.
About the Company
We started in 1988. Over 35 years in hydraulic components. Our team has more than 200 people. Some have been here twenty years.
We are a factory. We machine, assemble, and test everything ourselves. One roof. Full control.
We ship over 10,000 containers a year. Customers in more than 20 countries-Russia, Europe, the Middle East, South America, Southeast Asia.
Quality control
Every batch goes through at least 10 checks before shipping. Each motor is tested on dedicated stands. Leakage and performance are verified.
Engineering
We have real engineering depth. Senior industry experts advise us. Our engineers continuously improve the product.
With over 35 years of experience, we manufacture the BM5 Series - High-Pressure Gerotor Motor to the highest quality standards.
What we offer
12-month warranty from Bill of Lading date. Technical support. Shipping by sea, air, rail, truck, or express. Export packaging.
How to Order
Ordering a BM5 motor is straightforward:
Series: BM5
Displacement: 80 to 500 cc/rev
Output shaft: Specify your requirement
Flange type: Specify your requirement
Port configuration: Specify your requirement
Quantity: How many?
Standard motors have no minimum order. Custom motors require at least 10 pieces.
FAQ
Q: What is the difference between the BM5 and BM4 series?
A: The BM5 handles higher pressure-28 MPa intermittent versus 15 MPa on the BM4. The BM5 also uses a disc valve with automatic wear compensation, while the BM4 uses a standard spool valve design. The BM5 is built for high-pressure applications; the BM4 is built for high-torque, heavy-load applications.
Q: What is automatic wear compensation and how does it work?
A: The disc valve distribution mechanism adjusts itself as internal parts wear. The valve maintains its sealing clearance automatically. Efficiency stays consistent over the motor's service life. Most motors lose performance as they age; the BM5 does not.
Q: What voltage options are available for the BM5?
A: The BM5 does not use solenoids-it is a hydraulic motor, not a valve. It operates on hydraulic flow and pressure. No electrical connection is required.
Q: What is the recommended oil viscosity for the BM5?
A: Use hydraulic oil within the viscosity range of 37 to 73 cSt. Recommended fluid is 68# anti-wear hydraulic oil. Cleanliness should be ISO 18/13 or better.
Q: What is the recommended maintenance schedule for the BM5?
A: Check oil cleanliness every 500 operating hours. Change oil and filters every 2000 hours or per your system schedule. Inspect for external leakage during routine checks. If performance drops, test internal leakage.
Q: What is the delivery time for standard orders?
A: For standard configurations, we typically ship within 2 to 3 business days if in stock. Bulk orders without stock take 10 to 14 business days. Custom orders take 15 to 25 business days.
Q: Can I mount the BM5 vertically?
A: Yes. The motor works in any orientation. If mounted shaft-up, oil may pool inside. Consider a case drain if your application requires vertical shaft-up mounting.
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