Hydraulic Motors

JNM Series Radial Piston Hydraulic Motors

JNM Series oscillating-cylinder crankshaft radial piston hydraulic motors support low-speed high-torque drives in winch, drilling, marine deck and industrial equipment.

Focus: JNM model group, displacement, shaft and distributor interface
Engineering boundary: Catalog values are preliminary references; final duty, pressure and interface require JST engineering confirmation.

Product Overview

Series capability and selection context

JNM05 and JNM1 through JNM7 are internal model groups within one JNM Series. Shaft end and distributor or valve-plate choices are selected separately for the application.

Wide displacement range

The catalog covers JNM05 through JNM7, with preliminary displacement references from 59 to 4298 mL/rev.

Stable low-speed torque

The radial piston construction is intended for low-speed, high-torque hydraulic drives; final duty conditions require engineering review.

Custom installation interfaces

Shaft end, mounting, port and distributor or valve-plate interfaces are selected against the equipment drawing and hydraulic circuit.

Technical Data

Verified series specifications

Product Type	Radial piston hydraulic motor
Series	JNM Series
Output Characteristic	Low-speed high-torque
Displacement	59-4298 mL/rev across JNM05-JNM7; preliminary catalog reference
Pressure / speed / torque	Confirm for the selected model, hydraulic circuit and duty
Shaft / distributor	Selected separately with the mounting and hydraulic interface
Shaft / Flange / Port	Customizable
Optional Configuration	Final configuration requires engineering confirmation
Applications	Winches, drilling rigs, marine deck machinery and industrial hydraulic drives

Catalog Reference

Catalog model references

Catalog values are preliminary references; final duty, pressure and interface require JST engineering confirmation.

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Showing all 8 models

Model group	Displacement	Verified catalog data	Source
JNM05	59–191 mL/rev	Rated torque: 235–760 N·m Rated pressure: 25 MPa Maximum pressure: 28–45 MPa Continuous speed: 1–700 r/min Maximum speed: 800–1000 r/min Weight: 22 kg	Catalog p.3
JNM1	99–340 mL/rev	Rated torque: 385–1225 N·m Rated pressure: 20–25 MPa Maximum pressure: 25–42.5 MPa Continuous speed: 1–550 r/min Maximum speed: 550–1000 r/min Weight: 31 kg	Catalog p.5
JNM2	192–623 mL/rev	Rated torque: 750–2433 N·m Rated pressure: 25 MPa Maximum pressure: 28–42.5 MPa Continuous speed: 0.7–550 r/min Maximum speed: 650–800 r/min Weight: 51 kg	Catalog p.7
JNM3	426–987 mL/rev	Rated torque: 1660–3850 N·m Rated pressure: 25 MPa Maximum pressure: 28–42.5 MPa Continuous speed: 0.5–500 r/min Maximum speed: 350–650 r/min Weight: 87 kg	Catalog p.9
JNM4	616–1316 mL/rev	Rated torque: 2403–5125 N·m Rated pressure: 25 MPa Maximum pressure: 28–40 MPa Continuous speed: 0.4–400 r/min Maximum speed: 350–550 r/min Weight: 120 kg	Catalog p.11
JNM5	807–2007 mL/rev	Rated torque: 3150–7825 N·m Rated pressure: 25 MPa Maximum pressure: 35–42.5 MPa Continuous speed: 0.3–325 r/min Maximum speed: 250–450 r/min Weight: 175 kg	Catalog p.13
JNM6	1690–3041 mL/rev	Rated torque: 6600–11875 N·m Rated pressure: 25 MPa Maximum pressure: 30–45 MPa Continuous speed: 0.2–250 r/min Maximum speed: 250–400 r/min Weight: 275 kg	Catalog p.15
JNM7	2007–4298 mL/rev	Rated torque: 7975–17100 N·m Rated pressure: 25 MPa Maximum pressure: 32 MPa Continuous speed: Up to 210 r/min Maximum speed: 225–450 r/min Weight: 340 kg	Catalog p.17

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Applications

Typical applications

Construction Machinery
Excavators, rotary drilling rigs, piling rigs, tunneling equipment.
Mining & Geological Equipment
Underground mining machinery, exploration rigs, crushers, drilling equipment.
Marine & Offshore
Deck winches, anchor handling systems, lifting devices, steering and propulsion auxiliaries.
Metallurgy & Heavy Industry
Steel mills, rolling equipment, forging manipulators, continuous casting machines.

Selection Guide

Information used for preliminary selection

Start with the required torque, speed range, pressure, flow and duty cycle.
Then confirm the JNM model group, displacement, shaft end, mounting and distributor or valve-plate interface.
Final configuration requires duty, pressure and interface confirmation.

Engineering Notes

Series-specific review points

Catalog model groups: JNM05, JNM1, JNM2, JNM3, JNM4, JNM5, JNM6 and JNM7.
Preliminary catalog displacement range: 59-4298 mL/rev across the series.
Shaft end and distributor or valve-plate choices are separate configuration decisions.
Pressure, speed, torque, mounting and hydraulic-interface values must be checked for the selected model and duty.

Catalog values are preliminary references; final duty, pressure and interface require JST engineering confirmation.

Technical Support