Airtac MKJ Adjustable Cylinder MKJ25X40-40S
The AirTAC MKJ Adjustable Cylinder MKJ25X40-40S is a genuine MK 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. As an MK unit a fixed rod stops the piston rod rotating.
- TypeMulti-mount, double rod, 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 MKJ25X40-40S
The MKJ25X40-40S is an AirTAC multi-mount cylinder with an adjustable stroke: a compact square-bodied, no-rotating cylinder that can be fixed from six directions - front, back, left, right, top and bottom - and mounted side by side to save space. The trailing S means this unit carries a magnet for magnetic-switch sensing in the slots around the body.
This is a genuine AirTAC part. The MK family is the no-rotating version of the multi-mount range (the MD family is the standard type), so this model suits jobs where the rod must not rotate. Dimensions and sizing details vary with the stroke, so confirm them from the datasheet on request.
Airtac MKJ Adjustable Cylinder MKJ25X40-40S Technical Specifications
| Model | Airtac MKJ Adjustable Cylinder MKJ25X40-40S |
|---|---|
| Type | Multi-mount cylinder, double rod, 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
Choose the 25 mm bore when your clamp or push job needs roughly 245.4 N of theoretical thrust at 0.5 MPa. Pick MK when the rod must not turn, or MD when rotation does not matter. This is the adjustable-stroke version, so the stroke can be set and then adjusted; confirm the exact adjustment range from the datasheet. Keep the stroke within the bore 25 table (up to 60 mm for double acting) - the short cover means an over-long stroke can compromise guidance. This SKU includes the magnet (trailing S); drop the S if you do not need one. Choose PT (blank) or G thread; bore 25 uses M5x0.8 ports. Route side-load questions to us.
Applications
Jig positioning with sensing
Position workpieces in a welding or machining jig and switch on clamp confirmation: the built-in magnet works with the switch slots around the body to signal stroke position.
Pick-and-place orienting
Place caps, plugs or connectors where the part must stay square: the fixed rod and plate prevent rod rotation during pick-and-place moves.
FAQ
What does the trailing S in MKJ25X40-40S mean?
The S means the cylinder is supplied with a magnet, so magnetic switches can detect rod position in the slots around the body. The same model without the S has no magnet. MKJ marks the no-rotating, adjustable-stroke variant: 25 mm bore, 40 mm stroke, with PT ports (M5x0.8) as this SKU has no G suffix.
Which directions can I fix this cylinder from?
The square body can be fixed from six directions - front, back, left, right, top and bottom - and units mount side by side to save space. Overall dimensions and side-load limits depend on the stroke, so confirm them from the datasheet.