Hydraulic Motors

QJM Series Radial Ball-Piston Hydraulic Motors

QJM Series low-speed high-torque radial ball-piston hydraulic motors use a floating-rotor structure for heavy rotary, winch, marine, mining and industrial drives.

Focus: Fixed or two-speed operation, structural option and duty confirmation
Engineering boundary: Catalog values are preliminary references; final duty, pressure and interface require JST engineering confirmation.

Product Overview

Series capability and selection context

1QJM identifies fixed-displacement choices and 2QJM identifies two-speed choices. Structural options, shaft, mounting and hydraulic interfaces require application confirmation.

Floating-rotor structure

The radial ball-piston floating-rotor and spherical-raceway structure is catalog-specific to QJM.

Project-specific interfaces

Supported, external-bearing, through-hole and brake structures are matched to the equipment and hydraulic interface.

Reliable heavy-duty replacement

The catalog includes fixed-displacement and two-speed choices; final selection remains subject to engineering review.

Technical Data

Verified series specifications

Product Type	Radial ball-piston hydraulic motor with floating rotor and spherical raceway
Output Characteristic	Low-speed high-torque output; confirm for the selected model and duty
Displacement	64-10150 mL/rev across catalog model ranges; preliminary reference
Model type	1QJM fixed displacement or 2QJM two-speed; confirm the final structure
Configuration	Z, Ze, T, S, Se, SeZ and A references require engineering confirmation
Applications	Winches, travel drives, slewing drives, mining and industrial rotary drives

Catalog Reference

Catalog model references

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

Filter model group

Showing all 10 models

Model group	Displacement	Verified catalog data	Source
QJM001	64–104 mL/rev	Model type: 1QJM	Catalog p.32
QJM01	100–203 mL/rev	Model type: 1QJM	Catalog p.32
QJM02	326–406 mL/rev	Model type: 1QJM, 2QJM	Catalog p.32 Catalog p.33
QJM11	339–664 mL/rev	Model type: 1QJM, 2QJM	Catalog p.32 Catalog p.33
QJM12	808–1330 mL/rev	Model type: 1QJM	Catalog p.32
QJM21	317–1650 mL/rev	Model type: 1QJM, 2QJM	Catalog p.32 Catalog p.33
QJM32	635–4000 mL/rev	Model type: 1QJM, 2QJM	Catalog p.32 Catalog p.33
QJM42	2110–4600 mL/rev	Model type: 1QJM, 2QJM	Catalog p.32 Catalog p.33
QJM52	2670–6360 mL/rev	Model type: 1QJM, 2QJM	Catalog p.32 Catalog p.33
QJM62	4000–10150 mL/rev	Model type: 1QJM, 2QJM	Catalog p.32 Catalog p.33

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Applications

Typical applications

Hydraulic winches: heavy-duty pulling, lifting, towing and hoisting systems.
Travel and track drives: mobile machinery, crawler equipment and special vehicles.
Slewing and rotary drives: cranes, drilling rigs, turntables and indexing systems.
Mining and tunneling equipment: harsh-duty hydraulic drive systems with shock loads and frequent reversing.
Marine deck machinery: capstans, winches and auxiliary rotating equipment.
Industrial machinery: steel plants, presses, heavy conveyors and low-speed high-torque rotation.

Selection Guide

Information used for preliminary selection

Start with required torque, speed, pressure, flow and duty cycle.
Confirm fixed-displacement or two-speed operation, then the QJM model range, structural option, shaft, mounting and hydraulic interface.
Keep continuous, rated, intermittent, maximum and peak conditions distinct during engineering review.
Final configuration requires duty, pressure and interface confirmation.

Engineering Notes

Series-specific review points

Motor principle: radial ball-piston hydraulic motor with floating rotor and spherical raceway.
Catalog model types: 1QJM fixed displacement and 2QJM two-speed.
Preliminary catalog displacement range: 64-10150 mL/rev (0.064-10.15 L/rev).
Structural options include Z, Ze, T, S, Se, SeZ and A references; confirm the required structure and interface.
The installation reference calls for 2-3 mm axial clearance; final installation and dimensions require confirmation.

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

Technical Support