Airtac MSK Multi-position Locking Cylinder MSK25X20S
The AirTAC Airtac MSK Multi-position Locking Cylinder MSK25X20S is a genuine MK multi-mount cylinder (single acting, push type), 25 mm bore. Its compact square body fixes from six directions and mounts side by side to save space. It delivers about 179.1 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, single acting, push type
- SeriesMK (no-rotating)
- Bore25 mm
- Push thrust @0.5 MPa179.1 N
- Operating pressure0.2 - 1.0 MPa (28 - 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 MSK Multi-position Locking Cylinder MSK25X20S
The MSK25X20S is a genuine AirTAC MK-family no-rotating multi-mount cylinder built for tight machine layouts. Its square body fixes from 6 directions - front, back, left, right, top and bottom - and mounts side by side with other units to save space, with magnetic-switch slots around the body. It is single acting, push type: the 25mm bore pushes with a theoretical thrust of 179.1 N at 0.5 MPa over a 20mm stroke, the longest stroke offered on single-acting MK bodies. Cushioning is a bumper, and high guide precision means no added lubricant is needed.
As an MK-series part, a fixed rod, plate and brass bushing stop the piston rod from turning, unlike the standard MD family where rotation is allowed. The trailing S in the SKU means this unit is supplied WITH a magnet - optional on MD/MK, so order the non-S code if you do not need position feedback. Operating pressure is 0.2-1.0 MPa (28-145 psi) with 1.5 MPa proof pressure and a -20 to 70 C temperature range (0 to 150 C only with the optional high-temperature seal material). Dimensions are per stroke; confirm exact sizing and bore detail from the datasheet, which we provide on request.
Airtac MSK Multi-position Locking Cylinder MSK25X20S Technical Specifications
| Model | Airtac MSK Multi-position Locking Cylinder MSK25X20S |
|---|---|
| Type | Multi-mount cylinder, single acting, push type |
| Series | MK (no-rotating) |
| Bore | 25 mm |
| Push thrust @0.5 MPa | 179.1 N |
| Port size | M5x0.8 (PT thread) |
| Magnet | With magnet (S) |
| Fluid | Air, filtered to 40 um |
|---|---|
| Operating pressure | 0.2 - 1.0 MPa (28 - 145 psi) |
| Proof pressure | 1.5 MPa (215 psi) |
| Temperature | -20 to 70 C |
| Speed range | 50 - 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: the 25mm bore gives a theoretical push of 179.1 N at 0.5 MPa, well above the 16mm bore's 70.4 N if your job is lighter. Decide MD vs MK by rotation - take MK, as here, when the rod or its tool must stay oriented. Then pick the acting type: single push (MSK) for air-out with spring return, single pull (MTK), double acting (MK), double rod (MKD), or adjustable stroke (MKJ) for a 10/20/30mm adjustable range on top of the base stroke. Single-acting strokes run to 20mm maximum, matching this SKU; the short cover means over-long strokes are off the table. The S adds the magnet for switch sensing; PT thread is fitted, with G available as an option.
Applications
Pick-and-place part release
Mounted side by side on a pick-and-place head plate, the non-rotating 20mm push stroke releases gripped small parts into nests, while the magnet signals extended position.
Fixture clamping
Fixed from the front or top of a machining fixture, the single-acting push clamps a bracket against a hard stop and springs back on air loss, freeing the part automatically.
Indexing stopper
Bolted to a conveyor side rail as a compact stopper, the rod halts a moving workpiece at each index station, with switch feedback from the magnet confirming it is in position.
FAQ
Is the magnet on the MSK25X20S standard equipment?
No - the magnet is an optional feature on AirTAC MD/MK cylinders, and this SKU simply includes it, shown by the trailing S in the code. With the magnet fitted, switches can be carried in the slots around the body to detect the rod position. If you do not need position sensing, order MSK25X20 without the S instead; never assume the magnet is fitted on non-S SKUs.
Why is the stroke capped at 20mm on this cylinder?
This is a single acting cylinder, and on the multi-mount body the short cover limits single-acting strokes to a 20mm maximum - the 20mm stroke here is already the longest available, so an over-long stroke is not an option. If you need more travel with powered return, move to a double acting MK variant. For side-load limits and exact per-stroke dimensions, confirm from the datasheet - we can supply it on request.