Eaton Char-Lynn BMPH-50 H Series Hydraulic Motor 50ml/R 2-Bolt Flange 1" Shaft

Item	Hydraulic Spool Valve Motor
OEM #	BMPHX-050-H2-K-S-TRB
Displacement	50cc
Flange	2-Bolt
Shaft Size	1" Shaft With Woodruff Key
Port	7/8-14 O-ring
Highlight	50ml/R hydraulic orbit motor, BMPH-50 hydraulic orbit motor, Charlynn Eaton H Series orbit motor

The Eaton Char-Lynn BMPH-50, a model from the Eaton Char-Lynn® H Series of gerotor hydraulic motors, is a classic product in the H Series family and is widely used in various light- to medium-duty hydraulic drive equipment worldwide. As one of the core products of the H Series, the BMPH-50 has become the preferred drive solution for many equipment manufacturers and maintenance users with its standard configuration: a displacement of 50 ml/rev (approximately 3.15 in³/rev), a 2-bolt SAE "A" flange mount, and a 1-inch straight shaft with a Woodruff key.

The BMPH Series adopts shaft distribution flow technology and a Gerotor gear set design, featuring remarkable characteristics such as compact structure, light weight and high power density. This series of motors is of medium size and economical design, suitable for light to medium load conditions, delivering excellent cost performance while ensuring reliability.

This product can fully replace original Char-Lynn models including 101-1003-009, 101-1025 and 101-1033, and can also serve as a direct replacement for equivalent models such as Danfoss OMP 50 and M+S MP 50, enabling plug-and-play equipment upgrades and maintenance.

1. Shaft Distributing Technology - The Core of Compactness and High Efficiency
The BMPH-50 adopts a shaft distributing flow structure. Hydraulic oil is distributed through the flow channels inside the output shaft, eliminating the need for a separate valve body. This design offers the following advantages:

• More compact structure: Significantly reduced axial length, saving installation space
• Lighter weight: A weight of 6 kg leads the industry among motors of the same displacement
• Fewer components: Fewer potential failure points, improving reliability

2. Gerotor Gear Set - The Foundation of Cycloid Technology
Designed with a Gerotor (cycloidal rotor) gear set, it consists of an inner rotor (rotor) and an outer gear ring (stator):

• Low starting pressure: Low-pressure starting characteristics ensure rapid system response
• Smooth operation: Multi-tooth meshing design delivers uniform, pulsation-free torque output
• Simple and reliable structure: Only a small number of moving parts, resulting in low maintenance costs

3. Optimized Specifically for Light to Medium Loads
As an economical model in the BMP series, the BMPH-50 is particularly suitable for applications with moderate requirements but dependable driving needs:

• Cost-effective: The BMPH-50 provides a higher cost-performance ratio compared to other models in the same series
• High power-to-weight ratio: 10 kW continuous output power with only 6 kg weight, ideal for space-constrained equipment
• Wide speed range: Stable operating range of 10–880 rpm, adapting to various working conditions

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