Airtac MKJ Adjustable Cylinder MKJ25X50-30S
The AirTAC Airtac MKJ Adjustable Cylinder MKJ25X50-30S is a genuine MK 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. As an MK unit a fixed rod stops the piston rod rotating.
- TypeMulti-mount, adjustable stroke
- SeriesMK (no-rotating)
- 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 MKJ Adjustable Cylinder MKJ25X50-30S
The AirTAC MKJ is an adjustable-stroke, no-rotating multi-mount cylinder: a compact square body that can be fixed from 6 directions - front, back, left, right, top and bottom - and mounted side by side with other cylinders to save space. This model carries a 25 mm bore, a 50 mm stroke and a 30 mm adjustable range as coded, double acting, giving about 245.4 N of theoretical push force at 0.5 MPa - enough for light clamping, stopping and positioning work. Cushioning is a bumper, magnetic-switch slots run around the body, and the guided design holds high precision without added lubrication. It runs on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), with a proof pressure of 1.5 MPa (215 psi) and a working temperature of -20 to 70 C (up to 0-150 C only with the optional high-temperature seal material).
This is a genuine AirTAC part. The MK family stops the rod from turning with a fixed rod, no-rotating plate and brass bushing, while the standard MD family allows rotation - choose MK when the rod or a fitted plate must stay square to the body. The trailing S means this SKU comes with a magnet; a code without S would be supplied without one. Dimensions for this bore and stroke are per the datasheet - confirm sizing with us on request.
Airtac MKJ Adjustable Cylinder MKJ25X50-30S Technical Specifications
| Model | Airtac MKJ Adjustable Cylinder MKJ25X50-30S |
|---|---|
| Type | Multi-mount cylinder, adjustable stroke |
| Series | MK (no-rotating) |
| 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 the force: at 0.5 MPa this 25 mm double-acting bore gives 245.4 N on the push stroke and 206.2 N on the pull stroke. MKJ is the no-rotating, adjustable-stroke variant of the MK family - double acting, with a 50 mm base stroke plus the adjustable range coded after the hyphen (30 mm here; confirm available ranges from the datasheet). Bore 25 double-acting strokes run up to 60 mm, but the short covers mean an over-long stroke on a compact body is a common mis-selection - keep the stroke realistic and check side-load capability with us before designing the fixture. Pick the S suffix for a magnet; the thread on this model is PT (G is the alternate suffix option). Port size is M5x0.8 on this bore.
Applications
Small-parts clamping on a fixture
A compact double-acting clamp that holds small parts during assembly. The no-rotating plate keeps the clamp pad square to the part, the bumper cushions the close, and 6-way fixing lets the body bolt where the jig has room.
Stopper on a conveyor gate
Raises a stopper to hold pallets or totes at a station. Fixing from the top, bottom or side of the short square body makes mounting beside a tight conveyor frame simple, and the plate keeps the stop face aligned.
Pick-and-place with orientation control
Drives a gripper between pick and place stations where the part must not spin. The fixed rod and no-rotating plate prevent rod rotation, and side-by-side mounting pairs X and Y motions in a small footprint.
FAQ
What does the -30S at the end of MKJ25X50-30S mean?
MKJ is the adjustable-stroke, no-rotating member of the MK family: 25 mm bore, 50 mm stroke, double acting. The figure after the hyphen is the adjustable range in mm on top of the base stroke, and the trailing S shows this SKU carries a magnet. A code without S is supplied without a magnet, and the thread is PT unless the code ends in G.
How does the no-rotating design help in actual use?
A fixed rod, a no-rotating plate and a brass bushing stop the piston rod from turning, so clamps, stoppers and gripper plates stay square to the work instead of spinning with the rod. For your specific stroke, confirm body dimensions and allowable side-load from the datasheet before fixing the fixture design.