Rigid distributor shaft
- Distributor shaft rigidly joined to the rear cover
- Rotor supported radially on the distributor shaft
- Ports can be connected with steel pipe
01Inlet/outlet ports
02Mounting holes
03Stator housing
Port end of a standard QJM shown. Actual construction is per the approved drawing.
Hydraulic motor · Mainly custom-built
QJM Series
Hydraulic Motor
A radial ball-piston motor for low speed and high torque. The rotor is supported radially on the distributor shaft and axially by steel balls running in the spherical stator raceway. The rotor output is an internal spline with a loose fit on the driven shaft, so the rotor floats while the distributor shaft stays rigid, and the inlet/outlet ports can be connected directly with steel pipe. Available in fixed-displacement and two-speed versions, with options such as a support bearing or a brake.
- Catalog displacement sizes
- 49sizes · 11 frame sizes
- Rated output torque
- 95–15,333N·m
- Displacement
- 0.064–10.15L/r
Rated pressure 10–20 MPa, peak pressure 16–31.5 MPa. Fixed-displacement 1QJM and two-speed 2QJM, with a three-speed version for QJM32; options include type Z with support bearing and type S with brake. Motors of the same frame size share the main outline dimensions and main parts.
Technical data
QJM Series size data
Use the selection map to locate sizes by the torque and speed you need, then see the full data for that frame size in the table below. Each size can be expanded to show the values of its fixed-displacement, two-speed, support-bearing and brake versions.
Selection map
Each dot is one displacement size
N·m
r/min
Construction
Showing all 49 sizes
Horizontal axis: rated torque (N·m, log scale), plotted from standard-version values. Torque and speed cannot both be taken at their upper limits; please confirm for your duty.
Click any size on the map to see its data, or enter the torque you need.
Smallest sizes that qualify
Frame size
Unit
Filtered by selection map
| Size | Displacement (L/r) | Rated torque (N·m) | Rated / peak pressure (MPa) | Speed range (r/min) | Catalog versions |
|---|---|---|---|---|---|
| QJM0013 sizes · standard weight 7 kg · 0.064–0.104 L/r · 95–154 N·m | |||||
| QJM001-0.063 | 0.064 | 95 | 10 / 16 | 8-600 | FixedZ |
| QJM001-0.08 | 0.083 | 123 | 10 / 16 | 8-500 | FixedZ |
| QJM001-0.10 | 0.104 | 154 | 10 / 16 | 8-400 | FixedZ |
| QJM0021 size · Z type only · 0.2 L/r · 295 N·m | |||||
| QJM002-0.2 | 0.2 | 295 | 10 / 16 | 5-320 | Z |
| QJM013 sizes · standard weight 15 kg · 0.1–0.203 L/r · 148–300 N·m | |||||
| QJM01-0.1 | 0.10 | 148 | 10 / 16 | 8-400 | Fixed |
| QJM01-0.16 | 0.163 | 241 | 10 / 16 | 8-350 | Fixed |
| QJM01-0.2 | 0.203 | 300 | 10 / 16 | 8-320 | Fixed |
| QJM022 sizes · standard weight 20 kg · 0.326–0.406 L/r · 483–600 N·m | |||||
| QJM02-0.32 | 0.326 | 483 | 10 / 16 | 5-320 | FixedZ |
| QJM02-0.4 | 0.406 | 600 | 10 / 16 | 5-320 | FixedTwo-speedZ |
| QJM114 sizes · standard weight 28 kg · 0.339–0.664 L/r · 468–983 N·m | |||||
| QJM11-0.32 | 0.339 | 468 | 10 / 16 | 5-400 | FixedZS |
| QJM11-0.4 | 0.404 | 598 | 10 / 16 | 5-400 | FixedTwo-speedZS |
| QJM11-0.5 | 0.496 | 734 | 10 / 16 | 5-320 | FixedTwo-speedZS |
| QJM11-0.63 | 0.664 | 983 | 10 / 16 | 4-250 | FixedTwo-speedZS |
| QJM123 sizes · standard weight 39 kg · 0.808–1.33 L/r · 1,195–1,968 N·m | |||||
| QJM12-0.8 | 0.808 | 1195 | 10 / 16 | 4-250 | Fixed |
| QJM12-1.0 | 1.0 | 1480 | 10 / 16 | 4-200 | FixedZ |
| QJM12-1.25 | 1.33 | 1968 | 10 / 16 | 4-160 | FixedZ |
| QJM218 sizes · standard weight 50 kg · 0.317–1.65 L/r · 735–2,442 N·m | |||||
| QJM21-0.32 | 0.317 | 735 | 16 / 25 | 2-400 | FixedTwo-speedS |
| QJM21-0.4 | 0.404 | 957 | 16 / 25 | 2-400 | FixedZS |
| QJM21-0.5 | 0.496 | 1175 | 16 / 25 | 2-320 | FixedTwo-speedZS |
| QJM21-0.63 | 0.664 | 1572 | 16 / 25 | 2-250 | FixedTwo-speedZS |
| QJM21-0.8 | 0.808 | 1913 | 16 / 25 | 2-200 | FixedZS |
| QJM21-1.0 | 1.01 | 1495 | 10 / 16 | 2-160 | FixedTwo-speedZS |
| QJM21-1.25 | 1.354 | 2004 | 10 / 16 | 2-125 | FixedTwo-speedZS |
| QJM21-1.6 | 1.65 | 2442 | 10 / 16 | 2-100 | FixedTwo-speedZS |
| QJM3210 sizes · standard weight 80 kg · 0.635–4 L/r · 1,880–5,920 N·m | |||||
| QJM32-0.63 | 0.635 | 1880 | 20 / 31.5 | 3-300 | FixedTwo-speedZS |
| QJM32-0.8 | 0.808 | 2368 | 20 / 31.5 | 3-250 | FixedS |
| QJM32-1.0 | 1.06 | 3138 | 20 / 31.5 | 2-250 | FixedTwo-speedZS |
| QJM32-1.25 | 1.295 | 3833 | 20 / 31.5 | 2-200 | FixedTwo-speedThree-speedZS |
| QJM32-1.6/0.4 | 1.6 | 4736 | 20 / 31.5 | 2-250 | Two-speed |
| QJM32-1.6 | 1.649 | 4881 | 20 / 31.5 | 2-200 | FixedTwo-speedThree-speedZS |
| QJM32-2.0 | 2.03 | 4807 | 16 / 25 | 2-200 | FixedTwo-speedZS |
| QJM32-2.5 | 2.71 | 4011 | 10 / 16 | 1-160 | FixedTwo-speedZS |
| QJM32-3.2 | 3.3 | 4884 | 10 / 16 | 1-125 | FixedTwo-speedZS |
| QJM32-4.0 | 4.0 | 5920 | 10 / 16 | 1-100 | FixedTwo-speedS |
| QJM425 sizes · standard weight 90 kg · 2.11–4.6 L/r · 4,850–7,578 N·m | |||||
| QJM42-2.0 | 2.11 | 6246 | 20 / 31.5 | 1-250 | FixedTwo-speedS |
| QJM42-2.5 | 2.56 | 7578 | 20 / 31.5 | 1-250 | FixedTwo-speedS |
| QJM42-3.2 | 3.24 | 4850 | 10 / 16 | 1-200 | FixedTwo-speedS |
| QJM42-4.0 | 4.0 | 5920 | 10 / 16 | 1-160 | FixedTwo-speedS |
| QJM42-4.5 | 4.6 | 6808 | 10 / 16 | 1-125 | FixedTwo-speedS |
| QJM525 sizes · standard weight 150 kg · 2.67–6.36 L/r · 7,740–9,590 N·m | |||||
| QJM52-2.5 | 2.67 | 7903 | 20 / 31.5 | 1-200 | FixedTwo-speedZS |
| QJM52-3.2 | 3.24 | 9590 | 20 / 31.5 | 1-200 | FixedTwo-speedZS |
| QJM52-4.0 | 4.0 | 9472 | 16 / 25 | 1-200 | FixedTwo-speedZS |
| QJM52-5.0 | 5.23 | 7740 | 10 / 16 | 1-160 | FixedTwo-speedZS |
| QJM52-6.3 | 6.36 | 9413 | 10 / 16 | 1-125 | FixedTwo-speedZS |
| QJM625 sizes · standard weight 200 kg · 4–10.15 L/r · 11,618–15,333 N·m | |||||
| QJM62-4.0 | 4.0 | 11840 | 20 / 31.5 | 0.5-150 | FixedTwo-speedZ |
| QJM62-5.0 | 5.18 | 15333 | 20 / 31.5 | 0.5-105 | FixedTwo-speedZ |
| QJM62-6.3 | 6.27 | 14847 | 16 / 25 | 0.5-125 | FixedTwo-speedZ |
| QJM62-8.0 | 7.85 | 11618 | 10 / 16 | 0.5-100 | FixedTwo-speedZ |
| QJM62-10 | 10.15 | 15022 | 10 / 16 | 0.5-80 | FixedTwo-speedZ |
No matching sizes. The search only covers sizes that meet the filter conditions; clear the conditions to search all sizes. Tell us the torque, speed and mounting interface you need and ask about a custom build.
Showing 3 of 49 sizes
Click a size to see the values of each model. Converted values; the metric values govern.
Ratings: the table shows standard-version values (fixed-displacement 1QJM; for sizes offered only as two-speed or with support bearing, the values of that model). For two-speed models, displacement and torque are given as a pair, the first being full displacement. Rated torque is the value at rated pressure; peak pressure is not a continuous working pressure. Some values of the same size differ slightly between its fixed-displacement, two-speed, support-bearing and brake models; expand a size to see the values of each model.
Model code
What each part of the model code means
Example: 2QJM21-0.63SZ
2QJM21-0.63SZ
- 21 = fixed displacement, 2 = two-step variable displacement (two-speed)
- QJMRadial ball-piston, rotating-shaft hydraulic motor
- 21Frame size; motors of the same frame size share the main outline dimensions and main parts
- 0.63Displacement (L/rev)
- SZConstruction: no letter = standard; Z = with support bearing (a following digit gives the variant); Ze = external drive bearing; T = through hole (a following digit gives the hole diameter); S = with self-actuated brake; Se = with externally controlled brake, straight-sided spline bore output; SeZ = externally controlled brake, parallel key shaft output; A = spline dimensions differ from the series
- Example 2QJM21-0.63SZ: two-speed hydraulically controlled variable displacement, frame size 21, displacement 0.63 L/rev, with self-actuated brake, support-bearing type, parallel key shaft output.
- Data and outline dimensions are given for the standard, Z and S types; Ze, T, Se, SeZ, A and other constructions are confirmed per project.
Construction & installation
Floating rotor: leave axial clearance when installing
The QJM rotor floats, so installation and coupling must follow the requirements below; outline dimensions of the support-bearing and brake versions are in the frame-size drawings above.
Ball pistons & floating rotor
- Axial support by the spherical stator raceway and steel balls
- Rotor output is an internal spline
- Loose fit on the driven shaft
Installation & coupling
- Can be installed in any orientation
- Spline coupling must leave 2–3 mm axial clearance
- Motor spline bore and driven spline shaft must be aligned with a loose fit
Custom builds
Mainly custom-built, designed around your machine
The catalog sizes are a starting point for selection. Each item below can be designed to the torque, speed and mounting conditions of your equipment.
Displacement & speed control
- Displacement changed within a frame size
- Fixed displacement or two-speed hydraulic control
- Torque, speed and pressure matched to the duty
Support, brake & through hole
- Support bearing or external drive bearing
- Self-actuated or externally controlled brake
- Through-hole construction
Output & interfaces
- Internal spline bore, parallel key shaft or spline shaft output
- Spline dimensions made to suit the driven machine
- Mounting pilot, ports and control port
QJM vs. JHM and JNM catalog data
| Item | QJM Series | JHM Series | JNM Series |
|---|---|---|---|
| Construction | Radial ball-piston (floating rotor) | Crankshaft-connecting rod (5-cylinder radial star-type motor) | Oscillating-cylinder crankshaft radial piston |
| Catalog sizes | 49 · 11 frame sizes | 44 · 7 series | 55 · 8 frame sizes |
| Rated torque | 95–15,333 N·m | 253.75–13,508 N·m | 235–17,100 N·m |
| Displacement | 64–10,150 ml/r | 64–4,828 ml/r | 59–4,298 ml/r |
| Rated / max. pressure | 10–20 / 16–31.5 MPa (peak) | 16–25 / 20–32 MPa | 20–25 / 25–45 MPa |
| Displacement control | Fixed, two-speed; three-speed for QJM32 | Fixed | Fixed |
The choice is confirmed against torque, speed, pressure, mounting interface and your existing equipment model. See the JHM Series · See the JNM Series.
Related products
Related motors and drive products
For higher output torque, a motor can be combined with a planetary gearbox to form a transmission unit or a winch.
Selection support
Tell us your duty,
we'll confirm the right motor configuration.
Send the information in the checklist and we will check it against the catalog sizes or assess a custom design. The product catalog and installation drawing are provided once the model and mounting interface are confirmed.
Please include
- 01Required output torque (continuous and peak) and speed
- 02System pressure and flow, and whether two-speed is needed
- 03Output type (internal spline bore / parallel key shaft), support and brake requirements
- 04Mounting pilot and available space, or your current motor model