Airtac MKJ Adjustable Cylinder MKJ25X20-10S
The AirTAC Airtac MKJ Adjustable Cylinder MKJ25X20-10S 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 MKJ25X20-10S
The MKJ25X20-10S is a genuine AirTAC multi-mount cylinder: a compact square-body actuator that fixes from 6 directions (front, back, left, right, top and bottom) and mounts side by side to save space. The MK no-rotating design uses a fixed rod and plate so the rod cannot turn, keeping attached tooling square to the work. The 25 mm bore in double-acting service provides a theoretical 245.4 N push at 0.5 MPa, the 20 mm stroke is adjustable over a further 10 mm, and cushioning is by bumper.
This is a genuine AirTAC part. The trailing S in the code means this unit is built with a magnet, so magnetic switches in the slots around the body can signal rod position - a magnet is an option on MD/MK cylinders, not a given, so check each SKU. If rod rotation is acceptable in your design, the MD family offers the same multi-mount layout in a standard version. Stroke-specific dimensions and sizing can be confirmed from the datasheet on request.
Airtac MKJ Adjustable Cylinder MKJ25X20-10S Technical Specifications
| Model | Airtac MKJ Adjustable Cylinder MKJ25X20-10S |
|---|---|
| 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
Pick the 25 mm bore when your clamp or push needs about 245.4 N of theoretical thrust at 0.5 MPa in double-acting service. MKJ means the no-rotating MK body with an adjustable stroke: here a 20 mm base stroke plus a 10 mm adjustable range. Keep the base stroke inside the bore's table (up to 60 mm for this double-acting bore) and avoid over-long strokes given the short covers. The trailing S orders the magnet for switch detection; drop the S if you do not need sensing. Thread is PT by default - order the G variant for G ports.
Applications
Pick-and-place Z-drop on a compact gantry
Mounted top-down on a small pick-and-place head, the cylinder lowers a suction cup or gripper. The no-rotating rod keeps the part orientation true at the drop point, and the magnet gives retract signal before the gantry moves.
Ejector pin on a small assembly fixture
Fixed through the fixture base, the cylinder kicks finished parts off a nest. The 20 mm stroke plus 10 mm adjustment matches the nest depth, and the 245.4 N push at 0.5 MPa clears the part reliably.
Tooling clamp on a rotary indexing machine
Mounted radially around an indexing table, multiple cylinders clamp fixtures in sync. The 6-way fixing suits top, side or bottom attachment on tight tooling plates, and the magnet confirms clamp-before-cycle interlocks.
FAQ
What does MKJ25X20-10S decode to, and how does MK differ from MD?
MKJ is the no-rotating MK family in adjustable-stroke form, 25 is the bore, 20 is the base stroke, -10 adds a 10 mm adjustable range, and the trailing S means a magnet is fitted. MK prevents rod rotation with a fixed rod and plate; MD is the standard version that allows rotation. Choose MK when a clamp plate or gripper must stay square.
Can I over-stroke this cylinder for a longer reach, and what are its exact dimensions?
No - keep the base stroke within the published table for the 25 mm bore, since the short end covers mean an over-long stroke should be avoided; use the 10 mm adjustable range for fine positioning instead. Overall dimensions are stroke-specific and not listed here, so confirm them from the datasheet or ask us and we will check the figures for you.