Airtac MTK Multi-position Locking Cylinder MTK25X20S
The AirTAC Airtac MTK Multi-position Locking Cylinder MTK25X20S is a genuine MK multi-mount cylinder (single acting, pull type), 25 mm bore. Its compact square body fixes from six directions and mounts side by side to save space. It delivers about 144.4 N of pull 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, pull type
- SeriesMK (no-rotating)
- Bore25 mm
- Pull thrust @0.5 MPa144.4 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 MTK Multi-position Locking Cylinder MTK25X20S
The AirTAC MTK25X20S is a compact square-body multi-mount cylinder from the MK family. Its body can be fixed from six directions - front, back, left, right, top and bottom - and units mount side by side to save space, with magnetic-switch slots around the body. This version is single acting of the pull type: air performs the pull stroke and the internal spring returns the rod, which suits a spring-extended pin or stopper that must be retracted by air. The 25 mm bore runs on 0.2-1.0 MPa (28-145 psi) filtered air, travels at 50-500 mm/s and is cushioned by a bumper. Because this is a pull-type cylinder, its thrust is developed on the pull side, which is lower than the push side - confirm the exact pull-side figure from the datasheet.
This is a genuine AirTAC part. The MK family is the no-rotating version of the multi-mount range: a plate, brass bushing and fixed rod stop the rod from turning, so an attached fixture or blade stays square to the body. The trailing S in MTK25X20S means this SKU carries a magnet, and the trailing G means the ports are cut with G thread rather than the standard PT. We confirm overall dimensions, rod detail and sizing from the datasheet on request.
Airtac MTK Multi-position Locking Cylinder MTK25X20S Technical Specifications
| Model | Airtac MTK Multi-position Locking Cylinder MTK25X20S |
|---|---|
| Type | Multi-mount cylinder, single acting, pull type |
| Series | MK (no-rotating) |
| Bore | 25 mm |
| Pull thrust @0.5 MPa | 144.4 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
Pick MK over MD when rod rotation must be prevented; the no-rotating plate and fixed rod hold orientation, while MD versions allow the rod to turn. This is a single-acting pull-type unit: air draws the rod in and the spring sends it back out. If you need force in both directions choose a double-acting MK, or an MSK push type where air should extend the rod. At 20 mm the stroke sits at the top of the single-acting range, so it is the longest travel this compact design offers - avoid strokes beyond it, as the covers limit travel. The trailing S adds a magnet for switch sensing, and the G-thread ports suit markets and fittings that use G rather than PT; a PT version is available without the G suffix. Route any side-load question to us, since allowable values come from the datasheet.
Applications
Conveyor divert gate
Fixed to the side of a small conveyor, the pull-type action retracts a gate or stopper tab with air to release a part down the line, then the spring swings it back into place. The six-way body mounts flat against the rail bracket.
Orientation-critical jig clamp release
On a jig where a flat-clamp interface must stay square to the part, the no-rotating rod prevents twist while air pulls the clamp open and the spring closes it. Several units mount side by side across a multi-station fixture.
Press-and-release checking station
The spring pushes a small checking anvil up against the workpiece, and the air-powered pull stroke lowers it so the operator can swap parts. The compact square body bolts from beneath the station where a tie-rod cylinder will not fit.
FAQ
Why does MTK25X20S end in both S and G?
The suffixes decode independently. The S means the cylinder is built with a magnet for switch sensing; the G means the air ports are G thread instead of the standard PT. So this model gives you both the magnet and the G-thread ports in one SKU.
What are the benefits of the no-rotating MK design here?
The fixed rod and no-rotating plate stop the rod from turning, so any flat or asymmetric attachment keeps its orientation stroke after stroke - useful for stopper tabs, clamp faces and flags. Mounting dimensions and allowable side-load depend on the bore and stroke, so confirm them from the datasheet before designing the fixture.