Airtac MK Series Multi-position Locking Cylinder MK20X15S
The AirTAC Airtac MK Series Multi-position Locking Cylinder MK20X15S is a genuine MK multi-mount cylinder (double acting), 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, double acting
- 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
- 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 MK Series Multi-position Locking Cylinder MK20X15S
The MK20X15S is a compact no-rotating multi-mount cylinder whose square aluminium body can be fixed from 6 directions - front, back, left, right, top and bottom - and bolted side by side with neighbouring units to save space. With a 20 mm bore and 15 mm stroke, it runs in double-acting mode at 30-500 mm/s on air filtered to 40 um, and delivers a theoretical push of 157.1 N at 0.5 MPa (131.9 N on the pull side) within a 0.15-1.0 MPa operating range. Cushioning is a bumper, so end-of-stroke impact is absorbed simply and reliably.
This is a genuine AirTAC part. The MK family adds a no-rotating plate, brass bushing and fixed rod that stop the piston rod turning - the key difference from the standard MD body. The trailing S on this SKU means the piston carries a magnet; porting is M5x0.8 with PT thread. Overall dimensions vary with stroke, so we confirm sizing and full specifications from the datasheet on request.
Airtac MK Series Multi-position Locking Cylinder MK20X15S Technical Specifications
| Model | Airtac MK Series Multi-position Locking Cylinder MK20X15S |
|---|---|
| Type | Multi-mount cylinder, double acting |
| Series | MK (no-rotating) |
| Bore | 20 mm |
| Push thrust @0.5 MPa | 157.1 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
The 20 mm bore gives 157.1 N of theoretical push at 0.5 MPa (131.9 N pull); if your application needs more force, step up to the 25 mm bore at 245.4 N. Choose MK over the standard MD when rotation must be prevented. Acting types available are double (MK), single push (MSK), single pull (MTK), double rod (MKD) and adjustable-stroke (MKJ, which adds a 10, 20 or 30 mm adjustable range on top of the base stroke). This unit's 15 mm stroke sits well inside the 60 mm maximum for a 20 mm bore - the short cover keeps the body compact, so avoid specifying more travel than the mechanism actually needs. Magnet is option S (fitted on this SKU), and thread is PT by default with G available.
Applications
Small-parts clamping
The 20 mm bore delivers 157.1 N of push at 0.5 MPa, enough to hold small machined or molded parts in a drilling or assembly fixture, while the no-rotating rod keeps the clamp pad square to the part.
Conveyor gate and stopper
Fixed to the top or side of a conveyor frame, the MK20X15S extends a stopper plate to pause cartons or workpieces at a workstation without the rod turning under load.
Jig positioning and indexing
Bolt the square body from any of 6 directions inside a jig to index parts between stations; side-by-side mounting keeps the fixture footprint tight on crowded machine tables.
FAQ
How much force does the 20 mm bore produce?
At 0.5 MPa the MK20X15S delivers a theoretical push of 157.1 N and 131.9 N on the pull side in double-acting operation. Operating pressure is 0.15-1.0 MPa (22-145 psi) at this bore; single-acting MK variants start at 0.2 MPa instead.
What does no-rotating mean in practice?
A fixed rod, brass bushing and no-rotating plate stop the piston rod from turning, so attached plates, gates and clamp pads stay square to the workpiece. The square body also fixes from 6 directions, so you can mount it wherever the jig layout needs it.