Airtac MDJ Adjustable Cylinder MDJ25X40-40
The AirTAC MDJ Adjustable Cylinder MDJ25X40-40 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
- MagnetWithout magnet
- 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 MDJ25X40-40
The AirTAC MDJ25X40-40 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 sit side by side on shared mounting surfaces to save space, with magnetic-switch slots machined around the body. Cushioning is a bumper.
This is a genuine AirTAC part in the MD standard family, where the piston rod is free to rotate; the MK family is the no-rotating alternative. As the SKU shows, this cylinder is without a magnet and has a PT thread. We confirm dimensions and sizing from the datasheet on request.
Airtac MDJ Adjustable Cylinder MDJ25X40-40 Technical Specifications
| Model | Airtac MDJ Adjustable Cylinder MDJ25X40-40 |
|---|---|
| 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 | Without magnet |
| 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 MD over MK if rotation of the rod is acceptable; pick MK only when the rod must not turn. This is the adjustable-stroke (MDJ) version: 40 mm base stroke with a 40 mm adjustable range, comfortably within the 60 mm maximum stroke for a 25 mm double-acting bore, and its short cover cautions against specifying an over-long stroke. This SKU is without a magnet; choose an S suffix if you need magnetic-switch sensing. Thread is PT as standard, with G available.
Applications
Small-parts clamping
Bolt the square body to any of its 6 faces inside a tight fixture and set the stroke with the 40 mm adjustment so the 25 mm bore clamps parts at a repeatable position.
Jig positioning on drill fixtures
Mount several MDJ cylinders side by side along a jig plate, adjusting each stroke independently to position workpieces without extra brackets.
Machine gate actuation
Fix the body top or bottom on a machine guard gate and tune the extended position via the adjustable stroke, with the bumper cushioning the close.
FAQ
What does the -40 at the end of MDJ25X40-40 mean?
The MDJ prefix is the adjustable-stroke version of the double-acting MD cylinder, and the -40 is the 40 mm adjustable range added on top of the 40 mm base stroke, so you can set the effective stroke length to suit the jig or fixture. The trailing position has no S, so this SKU is without a magnet.
How many ways can I mount this cylinder?
The square multi-mount body can be fixed from 6 directions: front, back, left, right, top and bottom, and cylinders mount side by side to save space. Overall dimensions vary with the stroke, so confirm them from the datasheet, and check side-load limits with us before applying an offset load.