Airtac MDJ Adjustable Cylinder MDJ25X30-20S
The AirTAC Airtac MDJ Adjustable Cylinder MDJ25X30-20S 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 MDJ25X30-20S
The MDJ25X30-20S is an AirTAC MD-series multi-mount cylinder with an adjustable stroke: a 30 mm base stroke plus a 20 mm adjustable range, so one cylinder can be trimmed to several stop positions. The compact square body fixes from six directions - front, back, left, right, top and bottom - and units can be mounted side by side to save space, with magnetic-switch slots machined around the body. This double-acting 25 mm bore version gives about 245.4 N of theoretical push force at 0.5 MPa, runs at 30-500 mm/s, operates on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), and is cushioned by a bumper.
This is a genuine AirTAC part. MD is the standard multi-mount family, so the rod is free to turn unless your fixture prevents it; only the MK family adds a no-rotating plate. The trailing S means this SKU includes the magnet for switch sensing. We will confirm dimensions, weight and sizing details from the datasheet on request.
Airtac MDJ Adjustable Cylinder MDJ25X30-20S Technical Specifications
| Model | Airtac MDJ Adjustable Cylinder MDJ25X30-20S |
|---|---|
| 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
Choose the bore for your thrust: at 0.5 MPa the 25 mm bore pushes about 245.4 N (the pull side is lower). Pick MD when rod rotation is acceptable and MK when it must be prevented. Acting type options include double acting, single push (MSD), single pull (MTD), double rod (MDD) and this adjustable-stroke MDJ, which adds a 10, 20 or 30 mm adjustable range on top of the base stroke; double-acting strokes in this bore run up to 60 mm. The trailing S adds the magnet, and the thread is PT (default) or G. The short body cover means an over-long stroke should be avoided - if you need a long stroke or expect side load, confirm the limits from the datasheet or ask us.
Applications
Small-parts clamping
A compact multi-mount cylinder fixed from the top or side of a small fixture, with the adjustable range tuned to grip parts of slightly different heights without extra spacers.
Jig positioning
Mounted side by side along a machining or assembly jig, the square body uses its 6-direction fixing to place several cylinders in tight rows for repeatable part location.
Part stopper on an indexing line
Used as a stopper on a small indexing conveyor, the bumper cushions the arriving part while the 25 mm bore supplies the push force to hold it in position.
FAQ
What does the -20 in MDJ25X30-20S mean?
MDJ is the adjustable-stroke version of the MD double-acting multi-mount cylinder. The code reads as a 25 mm bore, a 30 mm base stroke and a 20 mm adjustable range, and the trailing S shows the magnet is included. The PT thread is the default.
How do I mount this cylinder in a tight fixture?
The square body can be fixed from six directions - front, back, left, right, top and bottom - and cylinders can sit side by side to save space. Because the body is short, avoid over-long strokes, and confirm stroke-related dimensions and any side-load allowance from the datasheet before finalising the fixture.