Excavator Parts

Low Speed High Torque JH Series Hydraulic Motors

Low speed high torque JH series hydraulic motors from BzzSeries, designed for steady output in heavy-duty construction and industrial machinery. Available in displacement sizes from 50 to 395 cc/r, with rated speeds up to 680 RPM and maximum pressure up to 15.5 MPa. These motors feature spool valving, gerotor design, and a high-pressure shaft seal for reliable operation in demanding environments. They are suitable for use in excavators, wheel loaders, harvesters, and other machinery requiring consistent torque at low RPM.

Brand BzzSeries
Model JH
Displacement 50 to 395 cc/r
Rated Speed 680 to 128 RPM
Max Speed 850 to 140 RPM

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Stock number held for this listing: 10257

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

Key Benefits

What This Unit Does Well

Spool valving and gerotor design deliver smooth, consistent torque at low speeds
High-pressure shaft seal improves durability in continuous-duty applications
Wide range of mounting flanges, shafts, and ports allows direct fitment to existing systems
Rated pressure of 13.8 MPa across most models ensures reliable performance under load
Compact design reduces space requirements in tight machinery layouts
Available in single units with no MOQ, ideal for urgent replacements or small fleet needs

Application Scenarios

Where It Is Used

Excavator swing drive in mining or quarry operations where steady torque is critical
Wheel loader bucket rotation under high resistance from compacted material
Harvester drive system requiring consistent low-speed torque during crop harvesting
Oil-drilling rig rotary table drive where high torque at low RPM is essential
Lift truck mast rotation in confined warehouse spaces with limited power input

Fit

Who It Is For

Fleet maintenance teams replacing worn hydraulic motors on excavators and loaders
Contractors needing immediate spare motors for on-site repairs without long lead times
Machinery dealers stocking common hydraulic motor sizes for resale in African and Middle Eastern markets
Engineering teams integrating low-speed torque motors into custom-built equipment

Buyer Pain

Problems It Solves

Long wait times for OEM hydraulic motors from original equipment suppliers
Inconsistent torque output due to poor motor design in high-resistance applications
Lack of spare parts availability for older or discontinued excavator models
Space constraints in machinery where standard motors do not fit the mounting layout
Unreliable shaft seals causing fluid leakage in continuous-duty operations

Engineering

Technical Features

Spool valving for precise control of flow and direction
Gerotor internal design for high efficiency and low noise
High-pressure shaft seal rated for continuous operation at 15.5 MPa
Multiple mounting flange options to match common OEM configurations
Adjustable shaft rotation and speed via external control valves
Disc valve construction for improved sealing and reduced internal leakage

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 Low Speed High Torque JH Series Hydraulic Motors
Brand	BzzSeries
Model	JH
Displacement	50 to 395 cc/r
Rated Speed	680 to 128 RPM
Max Speed	850 to 140 RPM
Rated Pressure	13.8 MPa (up to 12.4 MPa for larger models)
Max Pressure	15.5 MPa (down to 10.3 MPa for larger models)
Rated Torque	92 to 435 Nm
Max Torque	105 to 485 Nm
Flow Rate Rated	38 to 53 LPM
Flow Rate Max	45 to 57 LPM
Weight	6.3 to 9.6 kg
Mounting Options	Multiple flanges, shafts, and ports available
Shaft Rotation	Bidirectional, controllable via valve
Application Type	Medium duty, continuous operation
Place of Origin	Shandong, China (Mainland)
Brand Name	Bzz
Series Model Number	JH

Materials

Materials and Build

Cast iron housing for rigidity and heat dissipation
Stainless steel shaft with hardened surface for wear resistance
High-pressure shaft seal made from imported materials
Internal gerotor components in hardened steel for long life
Disc valve assembly with precision-machined surfaces

Process

How an Order Is Handled

You provide the machine model, mounting layout, and required torque/speed range
We match the correct JH series model from stock based on your specifications
You confirm the model number, weight, and mounting details before payment
We pack the motor in a carton, then on a wooden pallet with plastic wrap
We arrange shipment within 3-7 days after prepayment, with tracking and export docs

Quality Control

Checks Before Loading

Each motor is tested under rated pressure and speed before packing
Shaft seal integrity is verified with a pressure hold test
Mounting flanges and shaft dimensions are checked against drawings
Packing is inspected for damage before shipment
Photographs of the motor and packaging are sent before dispatch

Customisation

What Can Be Changed

Custom mounting flanges to match specific OEM or retrofit requirements
Different shaft lengths or diameters upon request
Alternative port configurations for hydraulic line routing
Special paint or coating for corrosion resistance in harsh environments
Custom packaging for bulk or high-value orders

Honest Comparison

How It Compares With the Alternatives

Standard high-speed hydraulic motors	JH series delivers higher torque at lower RPM, better suited for heavy-load, slow-motion tasks
OEM replacement motors	Faster delivery and lower MOQ, but may require fitment verification for exact mounting and port alignment
Higher displacement motors from other brands	JH series offers better cost-to-torque ratio in medium-duty applications, with more mounting flexibility

Use Guide

Using It Well

Verify mounting flange alignment and bolt pattern before installation
Use only clean hydraulic fluid with recommended viscosity to prevent seal damage
Ensure pressure relief valves are set correctly to avoid overpressure during operation
Lubricate shaft bearing if specified in the installation manual before first use

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 JH series hydraulic motor showing the mounting flange and shaft

Close-up of the motor shaft and high-pressure shaft seal

Front view of the JH series motor with port locations and mounting holes visible

Packaged JH series hydraulic motor on a wooden pallet with plastic wrap

Source Specification

Manufacturer Text We Hold for This Listing

Low Speed High Torque JH Series Hydraulic Motors Low Speed High Torque JH Series Hydraulic Motors 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

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

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