Airtac MK Series Multi-position Locking Cylinder MK25X40
The AirTAC Airtac MK Series Multi-position Locking Cylinder MK25X40 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 MK25X40
The AirTAC MK25X40 is a 25mm bore, 40mm stroke no-rotating multi-mount cylinder. The compact square body fixes from six directions (front, back, left, right, top and bottom) and allows cylinders to be mounted side by side to save space, with magnetic-switch slots around the body and high guide precision without added lubricant. As a double acting 25mm bore unit it produces a theoretical push thrust of 245.4 N at 0.5 MPa (206.2 N pull side), with a bumper as the cushion, running on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi) and -20 to 70 C.
A genuine AirTAC part from the MK family: a no-rotating plate, brass bushing and fixed rod stop the rod from turning, so attached plates and fixtures hold their orientation. This SKU is supplied WITHOUT a magnet, exactly as the absence of the S suffix indicates. Dimensions and sizing are stroke-specific; we will confirm them from the datasheet on request.
Airtac MK Series Multi-position Locking Cylinder MK25X40 Technical Specifications
| Model | Airtac MK Series Multi-position Locking Cylinder MK25X40 |
|---|---|
| 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
Select the 25mm bore when the task calls for roughly 245 N of theoretical push thrust at 0.5 MPa (206.2 N pull side); 32mm offers more thrust, 20mm less. MK versus MD is the key choice: MK prevents rod rotation, MD allows it. This is the double acting MK; other acting types in the family are single push (MSK), single pull (MTK), double rod (MKD) and adjustable stroke (MKJ), the latter adding a 10/20/30mm adjustable range. The 40mm stroke stays within the 60mm maximum for this bore, and the short square cover warns against over-long strokes. No magnet on this SKU (no S suffix); PT thread is standard here with G available. Ask us for side-load figures from the datasheet.
Applications
Non-rotating part lift and lower
Mount the MK25X40 under a chute to lift parts by 40mm; the fixed rod and no-rotating plate keep a lift plate oriented, and the bumper cushions the return stroke at end of travel.
Orientation-critical jig clamps
Fix the body from any of six directions on a welding or assembly jig and clamp with a plate that cannot rotate, so clamp position repeats identically on every cylinder in the jig.
Compact indexing pushers
Arrange multiple MK25X40 cylinders side by side along a transfer line to index parts in 40mm steps; the space-saving square bodies share a compact envelope and keep pusher faces aligned.
FAQ
Is the MK25X40's 40mm stroke a good fit for this cylinder?
Yes. For a 25mm bore multi-mount cylinder the stroke table goes up to 60mm, so 40mm is well within range. Keep in mind that the short square cover design counsels against over-long strokes on these compact bodies; for longer travel, confirm the stroke you need against the datasheet or ask us.
How does the MK25X40's rod stay non-rotating, and why choose MK over MD?
The MK adds a no-rotating plate, brass bushing and fixed rod inside the body that stop the piston rod from turning. Choose MK when a stopper, plate or fixture must hold a fixed orientation; choose the MD family when rotation is not a concern. Both fix from six directions and mount side by side, with the same 245.4 N push thrust at 0.5 MPa for this 25mm bore.