Airtac MDJ Adjustable Cylinder MDJ25X45-20S
The AirTAC Airtac MDJ Adjustable Cylinder MDJ25X45-20S 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 MDJ25X45-20S
The MDJ25X45-20S is an AirTAC multi-mount cylinder with a compact square body you can fix from six directions - front, back, left, right, top and bottom - and install side by side to save space. This is a double acting adjustable-stroke unit: the 25 mm bore gives 245.4 N of theoretical push force at 0.5 MPa, with a 45 mm base stroke plus a 20 mm adjustable range so the effective stroke can be set in the fixture without swapping cylinders. Cushioning is a bumper. Magnetic-switch slots run around the body and the guides are built for high precision with no added lubricant.
This is a genuine AirTAC part. The MD family is the standard multi-mount cylinder where the rod is free to turn; the MK family is the no-rotating version for loads that must not rotate. The S suffix on this SKU means the cylinder is supplied with a magnet; unbilled versions without S are not. We are happy to confirm overall dimensions and sizing from the datasheet on request.
Airtac MDJ Adjustable Cylinder MDJ25X45-20S Technical Specifications
| Model | Airtac MDJ Adjustable Cylinder MDJ25X45-20S |
|---|---|
| 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
Size the bore to your thrust: a 25 mm bore double acting cylinder delivers 245.4 N theoretical push at 0.5 MPa, so use it where moderate clamping or positioning force is needed. Choose MD if the rod may rotate, MK if rotation must be prevented. Acting type options are double acting, single acting push, single acting pull, double rod, or adjustable stroke - this MDJ unit is double acting with a 45 mm stroke and a 20 mm adjustable range on top. Keep the base stroke within the bore 25 table (up to 60 mm); the body grows with stroke, so avoid an over-long stroke on compact fixtures. The S suffix adds the magnet; otherwise it is not supplied. Port is M5x0.8 with PT thread, and G thread is available - tell us if you need it. Route side-load questions to us.
Applications
Small-parts clamping
Mount several 25 mm units side by side on a fixture plate to grip small components in sequence, with the 20 mm adjustable range letting you fine-tune grip position per station.
Jig positioning
Fix the square body from the top or side of a drill or weld jig to push parts against a datum; the 245.4 N push at 0.5 MPa is enough for repeatable locating in a compact footprint.
Indexing stops
Install the cylinder under or beside a conveyor indexing fixture, bolting through the six mounting directions to place a stopper exactly where the part must pause.
FAQ
What does the -20 in MDJ25X45-20S mean?
The MDJ prefix marks an adjustable-stroke double acting cylinder. The code reads as 25 mm bore, 45 mm base stroke, and 10, 20 or 30 mm of adjustable range - here 20 mm - on top of the base stroke. The trailing S means the magnet is supplied; no S means it is not.
How do I mount it and how far can the stroke go?
The square body fixes from six directions (front, back, left, right, top, bottom), so you can bolt it face-on or side-on and place units side by side. Keep the base stroke within the bore 25 table (up to 60 mm): the covers take up body length, so an over-long stroke works against a compact layout. Overall dimensions are stroke-dependent - confirm them from the datasheet, and ask us about allowable side-load.