Airtac MDJ Adjustable Cylinder MDJ25X50-40S
The AirTAC MDJ Adjustable Cylinder MDJ25X50-40S 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 MDJ25X50-40S
The MDJ25X50-40S is a 25 mm bore, 50 mm stroke adjustable-stroke multi-mount cylinder from AirTAC, built with a magnet as the trailing S in the code shows. As a multi-mount body it fixes from 6 directions - front, back, left, right, top and bottom - and units mount side by side to save space, with magnetic-switch slots around the body. This double-acting version develops about 245.4 N of theoretical push thrust at 0.5 MPa, and the cushion is a bumper. The adjustable-stroke design lets you fine-set the working stroke for precise end positions.
This is a genuine AirTAC part in the standard MD family, where rod rotation is not restricted (choose the MK family if you need a no-rotating rod). Medium is air filtered to 40 um; operating pressure is 0.15-1.0 MPa (22-145 psi); speed is 30-500 mm/s; temperature is -20 to 70 C. Dimensions and sizing for this stroke are per the datasheet - we confirm them on request.
Airtac MDJ Adjustable Cylinder MDJ25X50-40S Technical Specifications
| Model | Airtac MDJ Adjustable Cylinder MDJ25X50-40S |
|---|---|
| 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
Bore sets thrust: this 25 mm bore gives about 245.4 N theoretical push at 0.5 MPa - step up to 32 mm for about 402.1 N or down to 20 mm for about 157.1 N. MD keeps rotation allowed; MK prevents it. Acting type: this is a double-acting adjustable-stroke (MDJ) unit; single push (MSD), single pull (MTD), double rod (MDD) and fixed-stroke MD are the alternatives. The 50 mm stroke sits inside the bore 25 table (up to 60 mm), with the 40 mm adjustable range shown in the code added on top - confirm exact adjustment from the datasheet. Keep strokes conservative: the short cover warns against over-long strokes, and side-load limits should be confirmed with us. This SKU includes the magnet (trailing S); the version without S omits it. Port is M5x0.8 with PT thread, or choose G.
Applications
Press-fit and staking station
Two units mounted side by side each drive a light press anvil onto small assemblies. The 25 mm bore push at 0.5 MPa covers light pressing work, the bumper cushions the approach, and the magnet lets proximity switches signal full clamping.
Z-axis lift of a small gripper
Fixed from the top of a compact pick-and-place head, the cylinder lifts a lightweight gripper a set 50 mm. The adjustable stroke sets the exact lift height, and the magnet allows end-position detection without external limit switches.
Jig positioning and indexing
Mounted side by side along an assembly jig, the cylinders actuate locating pins that index parts between stations. The 6-direction fixing suits dense jig plates, the adjustable range trims each pin's position, and the magnet supports position checking.
FAQ
What does the S at the end of MDJ25X50-40S mean?
The trailing S shows this cylinder is built with a magnet, which lets the magnetic-switch slots around the body accept switches for position detection. The same model without the S (MDJ25X50-40) is built without a magnet - magnet is an optional build, not a standard feature on every unit.
Where can I fix and mount this cylinder in a tight machine?
Anywhere the body can be bolted: the multi-mount design fixes from 6 directions - front, back, left, right, top and bottom - and units mount side by side to save space. Overall dimensions vary with stroke and mounting, so take exact figures from the datasheet or confirm with us.