Excavator Parts

Eaton Orbital Hydraulic Motor

A BzzSeries JH orbital hydraulic motor with displacement options from 50 to 395 cc/r, designed for medium-duty applications in construction and industrial machinery. Rated pressure of 13.8 MPa and maximum speed up to 850 RPM, it supports flow rates from 38 to 57 LPM. The motor features a compact design with spool valving, gerotor seal, and multiple mounting configurations for easy integration into excavators, loaders, and drilling equipment.

Brand BzzSeries
Model JH
Displacement 50 to 395 cc/r
Rated Flow 38 to 53 LPM
Max Flow 45 to 57 LPM

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Stock number held for this listing: 10264

BzzSeries JH orbital hydraulic motor mounted on a test bench with hydraulic lines connected

Key Benefits

What This Unit Does Well

Displacement range from 50 to 395 cc/r allows matching to different torque and speed needs in excavator and loader systems
Spool valving and gerotor seal design improves sealing under high pressure and reduces internal leakage
Multiple mounting flanges, shaft types, and port configurations simplify integration into existing machine layouts
Rated pressure of 13.8 MPa supports consistent performance in demanding hydraulic circuits
Compact size reduces space requirements in tight machine compartments

Application Scenarios

Where It Is Used

Excavator boom and arm actuation where consistent torque and smooth speed control are required
Wheel loader bucket and tilt cylinder drive in mining and quarry applications
Oil-drilling rig rotary table drive with stable low-speed operation
Fishing winch or net hauler system needing reliable reverse rotation and torque control
Plastic injection machine clamping unit where precise, repeatable motion is critical

Fit

Who It Is For

Fleet maintenance teams replacing worn hydraulic motors in excavators and loaders
Contractors sourcing spare motors for on-site repairs without long lead times
Machinery dealers stocking common hydraulic motor sizes for resale in Southeast Asia and Africa
Engineering teams integrating hydraulic motors into custom-built or retrofit machines

Buyer Pain

Problems It Solves

Unavailability of exact replacement motors due to discontinued OEM models
Long lead times for original equipment motors from European or North American suppliers
Mismatched mounting flanges or shaft types that require custom adapters
Inconsistent torque output from low-efficiency or worn motors in high-duty cycles
Lack of local stock for medium-duty motors used in excavators and loaders

Engineering

Technical Features

Orbital hydraulic motor with spool valving and gerotor seal design
Compact construction with multiple mounting flange options
Input shaft rotation direction and speed controlled via hydraulic flow
Rated pressure of 13.8 MPa for 50-100 cc/r models; 12.4 MPa for 160-395 cc/r models
Maximum pressure up to 15.5 MPa for short-term overload conditions
Rated speed from 680 RPM (50 cc/r) down to 128 RPM (395 cc/r)
Maximum speed up to 850 RPM for 50 cc/r model, decreasing with larger displacement

Specification

Specification Table for This Listing

Taken from the supplier specification we hold. Anything not listed here is confirmed in writing before order rather than assumed.

Specification of Eaton Orbital Hydraulic Motor
Brand	BzzSeries
Model	JH
Displacement	50 to 395 cc/r
Rated Flow	38 to 53 LPM
Max Flow	45 to 57 LPM
Rated Speed	680 to 128 RPM
Max Speed	850 to 140 RPM
Rated Pressure	13.8 MPa (50-100 cc/r), 12.4 MPa (160-395 cc/r)
Max Pressure	15.5 MPa (50-100 cc/r), 13.8 MPa (160-395 cc/r)
Rated Torque	92 to 435 Nm
Max Torque	105 to 485 Nm
Weight	6.3 to 9.6 kg
Mounting Options	Multiple flanges, shafts, and ports available
Shaft Rotation	Direction and speed controllable via hydraulic input
Application Type	Medium duty
Place of Origin	Shandong, China (Mainland)
Brand Name	Bzz
Series Model Number	JH
China (Mainland) Brand	Bzz
Series Model	JH

Materials

Materials and Build

Cast iron housing with precision-machined internal surfaces
High-pressure shaft seal imported for durability under continuous load
Steel internal components including orbital disc and roller assembly
Alloy steel shaft with hardened surface for wear resistance

Process

How an Order Is Handled

You provide the machine model, required torque, speed, and mounting configuration
You confirm the final specification including displacement, shaft type, and port layout
We prepare the motor, test run it under rated pressure, and record performance data
Unit is packed in a carton, placed on a wooden pallet, wrapped in plastic, and optionally boxed

Quality Control

Checks Before Loading

Each motor is tested under rated pressure and speed before packing
Shaft seal and internal clearances are checked for consistent performance
Mounting flanges and port alignment are verified against the drawing
Final packaging is inspected for damage risk during sea freight
Photos of the motor, serial number, and packing are sent before shipment

Customisation

What Can Be Changed

Custom shaft length, diameter, or keyway to match existing drive systems
Custom port size or orientation for integration with existing hydraulic lines
Alternative mounting flange to fit specific machine frame design
Special paint or coating for high-corrosion environments
Custom torque or speed profile for non-standard applications

Honest Comparison

How It Compares With the Alternatives

Standard axial piston motor	The orbital design is simpler, more compact, and easier to maintain, but offers lower efficiency at high speeds
Original Eaton motor	This BzzSeries JH is a direct fit for many Eaton applications, but not certified to Eaton's original specs or warranty
Low-displacement 30 cc/r motor	Higher displacement models deliver more torque at lower speeds, but require larger hydraulic pump capacity

Use Guide

Using It Well

Install with proper alignment to prevent shaft binding or seal damage
Replace internal seals if pressure drops below rated level or noise increases
Do not exceed maximum speed or pressure for more than 5 minutes continuously

Photographs

More Views of This Unit

Photographs held for this listing. Current yard photographs of the specific unit you shortlist are taken fresh before any balance is paid.

Side view of the hydraulic motor showing the shaft, mounting flange, and port configuration

Close-up of the motor housing and shaft seal with label for displacement and model

Motor mounted on a wooden pallet with plastic wrap and export label

Multiple BzzSeries JH motors in different sizes arranged on a workbench

Source Specification

Manufacturer Text We Hold for This Listing

eaton orbital hydraulic motor eaton orbital hydraulic motor Our Product Product Description Displacement cc/r 50 63 80 100 160 200 250 305 370 395 Flow LPM Rated 38 45 53 53 53 53 53 53 53 53 Max 45 57 57 57 57 57 57 57 57 57 Speed RPM Rated 680 610 600 480 305 240 185 154 135 128 Max 850 800 650 520 330 270 210 180 150 140 Pressure Mpa Rated 13.8 13.8 13.8 13.8 12.4 12.4 12.4 10.3 9.0 9.0 Max 15.5 15.5 15.5 15.5 13.8 13.8 13.8 12.4 10.3 10.3 Torque Nm Rated 92 121 150 189 259 315 385 395 405 435 Max 105 137 170 213 287 348 395 465 460 485 Weight KG 6.3 6.7 7.0 7.5 7.7 8.0 8.4 8.8 9.4 9.6 Product Details Product features: Compact in design with spool valving and Gerotor Imported high pressure capacity shaft seal Wide variety of mounting flanges,shafts,ports and speed provides design flexibility Direction of shaft rotation and speed can be controlled easily and smoothly Best combination o

Reproduced from the supplier specification. Figures are confirmed in writing on the proforma invoice before any deposit.

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