Airtac MKJ Adjustable Cylinder MKJ20X25-10
The AirTAC Airtac MKJ Adjustable Cylinder MKJ20X25-10 is a genuine MK multi-mount cylinder (adjustable stroke), 20 mm bore. Its compact square body fixes from six directions and mounts side by side to save space. It delivers about 157.1 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)
- Bore20 mm
- Push thrust @0.5 MPa157.1 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 MKJ Adjustable Cylinder MKJ20X25-10
The MKJ20X25-10 is an AirTAC multi-mount cylinder: a compact square-body double-acting actuator that can be fixed from six directions (front, back, left, right, top and bottom) and mounted side by side to save space. The MKJ adjustable-stroke design adds a 10 mm adjustment range on top of the 25 mm base stroke, so the effective stroke can be trimmed on the machine without swapping the cylinder. At 20 mm bore it delivers a theoretical push force of 157.1 N at 0.5 MPa, cushioned by a bumper, with magnetic-switch slots around the body and high guide precision (no added lubricant needed).
This is a genuine AirTAC part from the MK family, whose no-rotating plate and fixed rod stop the piston rod from turning, unlike the standard MD family where rotation is allowed. This SKU is listed without a magnet; the magnet option is indicated by an S at the end of the model code. We can confirm dimensions and sizing from the datasheet on request.
Airtac MKJ Adjustable Cylinder MKJ20X25-10 Technical Specifications
| Model | Airtac MKJ Adjustable Cylinder MKJ20X25-10 |
|---|---|
| Type | Multi-mount cylinder, adjustable stroke |
| Series | MK (no-rotating) |
| Bore | 20 mm |
| Push thrust @0.5 MPa | 157.1 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
Choose the 20 mm bore when your clamp or positioner needs around 157.1 N of theoretical push at 0.5 MPa on the double-acting push side (the pull side gives less). Pick the MK family, not MD, when the rod or attached plate must not rotate. The MKJ variant gives double-acting operation with an adjustable stroke: a 25 mm base stroke plus a 10 mm adjustable range, well within the bore 20 double-acting table that runs up to 60 mm. This SKU carries no magnet (add an S for the magnetic version) and PT ports; a G thread version is available. Note that the compact cover keeps practical strokes short, so avoid over-long strokes, and confirm side-load capability with us before applying lateral forces.
Applications
Small-parts clamping
Bolted through its top or side face, the 20 mm bore grips small machined or molded parts in a fixture, with the no-rotating rod keeping the clamp pad square to the part.
Jig positioning
Mounted side by side on a drill or assembly jig, adjustable strokes let operators fine-tune each stop position without swapping cylinders between changeovers.
Gate stopper on conveyors
Fixed from the frame top or bottom, the square body acts as a compact stopper that halts boxes or trays at a gate, with the non-rotating rod holding the stop face steady.
FAQ
What does the -10 at the end of MKJ20X25-10 mean?
MKJ is the adjustable-stroke version of the MK multi-mount cylinder. The code decodes as a 20 mm bore, 25 mm base stroke, and a 10 mm adjustable range added on top, so the effective stroke can be set anywhere up to 35 mm. This SKU has no trailing S, so it comes without a magnet, and no trailing G, so the ports are PT thread on M5x0.8 fittings.
How does the no-rotating rod help in a compact machine layout?
The MK body carries a no-rotating plate, bushing and fixed rod that stop the piston rod from turning, so attached clamp pads, stopper plates and pushers stay square to the work. The square body fixes from all six directions, but its compact cover suits short strokes, so avoid over-long stroke demands; exact dimensions and side-load ratings should be confirmed from the datasheet.