Airtac MDJ Adjustable Cylinder MDJ25X70-20S
The AirTAC Airtac MDJ Adjustable Cylinder MDJ25X70-20S is a genuine MD multi-mount cylinder (adjustable stroke), 25 mm bore. Its compact square body fixes from six directions and mounts side by side to save space. It delivers about 245.4 N of push force at 0.5 MPa. A bumper cushions the impact.
- TypeMulti-mount, adjustable stroke
- SeriesMD (standard)
- Bore25 mm
- Push thrust @0.5 MPa245.4 N
- Operating pressure0.15 - 1.0 MPa (22 - 145 psi)
- Port sizeM5x0.8
- CushionBumper
- MagnetWith magnet (sensor-ready)
- ThreadPT
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MDJ Adjustable Cylinder MDJ25X70-20S
The MDJ25X70-20S is an adjustable-stroke multi-mount cylinder with a 25 mm bore, 70 mm total stroke and a 20 mm adjustable range. The compact square body fixes from six directions - front, back, left, right, top and bottom - so units can be mounted side by side to save space, with magnetic-switch slots around the body and high guide precision that needs no added lubricant. Double acting operation runs at 30-500 mm/s, delivers a theoretical push force of 245.4 N at 0.5 MPa, and cushions with a bumper. Operating pressure is 0.15-1.0 MPa (22-145 psi) on air filtered to 40 um, from -20 to 70 C.
This is a genuine AirTAC part in the MD standard family, where the piston rod is free to rotate; if the rod must not turn, choose the MK no-rotating family instead. As the SKU shows, this model includes a magnet for position sensing. We confirm dimensions and sizing from the datasheet on request.
Airtac MDJ Adjustable Cylinder MDJ25X70-20S Technical Specifications
| Model | Airtac MDJ Adjustable Cylinder MDJ25X70-20S |
|---|---|
| Type | Multi-mount cylinder, adjustable stroke |
| Series | MD (standard) |
| Bore | 25 mm |
| Push thrust @0.5 MPa | 245.4 N |
| Port size | M5x0.8 (PT thread) |
| Magnet | With magnet (S) |
| Fluid | Air, filtered to 40 um |
|---|---|
| Operating pressure | 0.15 - 1.0 MPa (22 - 145 psi) |
| Proof pressure | 1.5 MPa (215 psi) |
| Temperature | -20 to 70 C |
| Speed range | 30 - 500 mm/s |
| Cushion | Bumper |
| Mounting | Fix from 6 directions; mountable side by side |
Specifications follow the official AirTAC MD/MK multi-mount data. The front cover and piston are short, so avoid an over-long stroke. An optional high-temperature seal material extends the range to 0 to 150 C. Overall dimensions vary per stroke and allowable side-load is published as curves — ask us and we confirm from the datasheet.
How to choose
Pick the bore for the force you need: at 0.5 MPa this 25 mm bore pushes 245.4 N double acting, while 20 mm gives less and 32 mm gives more. Choose MD if rod rotation is allowed, MK if it must be prevented. Acting choices are double, single push, single pull, double rod or adjustable stroke. Double-acting strokes on the 25 mm bore run to 60 mm, and MDJ adds a 10, 20 or 30 mm adjustable range on top, so this 70 mm model is within the table - but the short cover cautions against over-long strokes, so keep the ratio sensible. Order with magnet (S) or without, and PT or G thread; route side-load questions to us.
Applications
Small-parts clamping
Clamps small components in assembly fixtures. The 6-way fixing lets the 25 mm cylinder bolt in from whatever face the fixture offers, and the 20 mm adjustable range trims clamp travel to the part.
Jig positioning
Positions workpieces in welding and machining jigs where several cylinders must sit side by side; the square body keeps the layout compact and the magnet feeds position feedback.
Gate and stopper control
Extends and retracts a gate or stopper on a small parts line. Double acting control at 245.4 N push handles positive extension and retraction, cushioned by the bumper.
FAQ
What does the code MDJ25X70-20S decode to?
MDJ is the adjustable-stroke double-acting MD multi-mount variant. 25 is the bore in mm, 70 the stroke in mm, -20 adds a 20 mm adjustable range, the trailing S means a magnet is built in, and with no thread suffix the ports are PT. The 25 mm bore uses M5x0.8 ports.
Can I mount it any way I want, and where do I find side-load limits?
Yes - the body fixes from six directions: front, back, left, right, top and bottom, so it can sit side by side with other units. Allowable side-load is not published as a general number and dimensions vary with stroke, so confirm both from the datasheet before fixing a long stroke.