Airtac MDJ Adjustable Cylinder MDJ25X40-40S
The AirTAC MDJ Adjustable Cylinder MDJ25X40-40S is a genuine MD multi-mount cylinder (double rod, 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, double rod, 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 MDJ25X40-40S
The AirTAC MDJ25X40-40S is an adjustable-stroke multi-mount cylinder with a compact square body that can be fixed from 6 directions: front, back, left, right, top and bottom. Bodies mount side by side to save space, and magnetic-switch slots run around the body so sensors can be seated on any face.
This is a genuine AirTAC part in the MD standard family, where the rod may rotate; the MK family prevents rotation. As the SKU shows, the trailing S means this cylinder is WITH a magnet, and the thread is PT. We confirm dimensions and sizing from the datasheet on request.
Airtac MDJ Adjustable Cylinder MDJ25X40-40S Technical Specifications
| Model | Airtac MDJ Adjustable Cylinder MDJ25X40-40S |
|---|---|
| Type | Multi-mount cylinder, double rod, 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
Use MD where rod rotation is allowed and MK where it is not. The MDJ design combines a 40 mm base stroke with a 40 mm adjustable range, well inside the 60 mm stroke limit for a 25 mm double-acting bore; note that the short cover cautions against over-long strokes. The trailing S means the magnet is included, so magnetic-switch slots around the body can be used; drop the S if sensing is not needed. Thread is PT as standard, with G offered.
Applications
Pick-and-place z-stroke
Fix the body from its top or bottom face in a compact gripper module and use the magnet plus switch slots to signal end positions as the rod lifts parts.
Fixture clamping stations
Line up several S-suffix MDJ bodies side by side on a machining fixture and adjust each stroke so clamps close at the exact part height.
Product stopper on assembly lines
Mount the cylinder vertically to raise a stopper blade, tuning the stroke with the 40 mm adjustment and using the magnet to confirm the down position.
FAQ
Does MDJ25X40-40S include a magnet, and why does it matter?
Yes. The trailing S in the SKU means this cylinder is supplied WITH a magnet, so it works with magnetic switches seated in the slots around the square body. The same cylinder without the S suffix has no magnet and cannot be position-sensed this way.
How far can I extend the stroke with the adjustment?
This model has a 40 mm base stroke with a 40 mm adjustable range on top, within the 60 mm maximum stroke for a 25 mm double-acting bore. Keep the specified stroke modest, since the short cover design cautions against over-long strokes, and confirm exact dimensions from the datasheet.