Airtac MK Series Multi-position Locking Cylinder MK25X20
The AirTAC Airtac MK Series Multi-position Locking Cylinder MK25X20 is a genuine MK multi-mount cylinder (double acting), 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 acting
- 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
- 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 MK Series Multi-position Locking Cylinder MK25X20
The MK25X20 is a compact square-body multi-mount cylinder that can be fixed from 6 directions (front, back, left, right, top and bottom) and mounted side by side to save space. This is the MK no-rotating version in double acting configuration with a 25 mm bore and 20 mm stroke: compressed air drives the rod out and retracts it, while a no-rotating plate, bushing and fixed rod stop the rod from turning. At 0.5 MPa the 25 mm bore delivers a theoretical push thrust of 245.4 N, and the cushion is a bumper.
This is a genuine AirTAC part. MK family cylinders prevent rod rotation, unlike the standard MD family where rotation is allowed; choose MK whenever the attached tooling must stay square. As the SKU shows, this model is without a magnet. Overall dimensions vary with stroke, so confirm sizing and mounting detail from the datasheet on request.
Airtac MK Series Multi-position Locking Cylinder MK25X20 Technical Specifications
| Model | Airtac MK Series Multi-position Locking Cylinder MK25X20 |
|---|---|
| Type | Multi-mount cylinder, double acting |
| Series | MK (no-rotating) |
| Bore | 25 mm |
| Push thrust @0.5 MPa | 245.4 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
Start with thrust: at 0.5 MPa this 25 mm bore gives 245.4 N theoretical push in double acting use; move up or down a bore if your load needs more or less. Then decide MD (standard, rotation allowed) vs MK (no-rotating, rotation prevented). Acting type options include double, single push, single pull, double rod and adjustable stroke. This SKU is double acting with a 20 mm stroke; bore 25 double acting cylinders are listed up to 60 mm stroke, but keep the stroke short because the covers are close to the body and an over-long stroke is a common mis-selection. Add S to the code if you need a magnet, and choose PT (default) or G thread for the M5x0.8 port. Side-load ratings are not stated here; send us your application and we will confirm from the datasheet.
Applications
Conveyor gate and stopper
A stopper blade or gate must present the same face to every arriving part. The no-rotating rod keeps the blade square through thousands of extend-retract cycles, and the 6-direction fixing lets the cylinder bolt directly to the conveyor frame.
Machining fixture clamp
Clamping a machined part inside a jig often needs the clamp pad to hold orientation. The MK25X20's fixed rod and plate stop twist under load, and its 20 mm stroke suits short-reach clamping where every millimetre of fixture height counts.
Indexing pusher station
Side-by-side mounting lets several 25 mm bore cylinders sit on tight pitch centers in an indexing or diverting station, each pushing a part into the next nest from the body's 6 available mounting faces.
FAQ
What does the MK in MK25X20 mean, and how is it different from an MD cylinder?
MK is the no-rotating version of the multi-mount family: a plate, bushing and fixed rod stop the piston rod from turning, which an MD standard cylinder does not do. The acting type, bore and mounting style are otherwise the same idea, so choose MK when the load must not rotate.
Where can I mount the body, and how long can the stroke be?
The square body fixes from 6 directions: front, back, left, right, top and bottom, so cylinders can also sit side by side to save space. Bore 25 double acting models are listed up to 60 mm stroke, but the covers are short, so avoid an over-long stroke; exact dimensions and side-load limits come from the datasheet, which we can confirm for you.