Airtac MK Series Multi-position Locking Cylinder MK20X30S
The AirTAC Airtac MK Series Multi-position Locking Cylinder MK20X30S 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 MK20X30S
The MK20X30S is an AirTAC MK series multi-mount cylinder, a compact square-body cylinder with a 20 mm bore and 30 mm stroke that fixes from six directions (front, back, left, right, top and bottom) and mounts side by side to save space. It is double acting, and the MK no-rotating plate stops the piston rod from turning, so a pusher plate or fixture mounted on the rod stays square. At 0.5 MPa this bore delivers about 157.1 N of theoretical push, and a bumper cushions the piston at each end of stroke.
This is a genuine AirTAC part. The MK family prevents rod rotation, while the standard MD family allows it. This SKU carries a magnet (the trailing S), so the magnetic-switch slots around the body can be used for position detection. Operating range on this bore is 0.15-1.0 MPa (22-145 psi), the medium is air filtered to 40 um, and working temperature is -20 to 70 C (up to 150 C only with the optional high-temperature seal material). We confirm dimensions and sizing from the datasheet on request.
Airtac MK Series Multi-position Locking Cylinder MK20X30S Technical Specifications
| Model | Airtac MK Series Multi-position Locking Cylinder MK20X30S |
|---|---|
| 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
Bore sets thrust: at 0.5 MPa this 20 mm bore pushes about 157.1 N double acting, with about 131.9 N on the pull side. Choose MK when the rod must not rotate; choose MD if rotation is acceptable. This unit is double acting with a 30 mm stroke, within the bore 20 table that runs up to 60 mm; the short cover keeps the body compact, so avoid specifying an over-long stroke for the job. The trailing S adds a magnet for switch detection; omit S for no magnet. The port is M5x0.8 with PT thread by default, and a G thread version is available. Side-load capacity is not quoted here; route that question to us.
Applications
Conveyor stopper
Extend under a moving line to stop cartons or trays at a station. The no-rotating rod keeps the stop pad square to the product, and the flat square body fixes from the side or bottom of the frame.
Small-parts clamping
Clamp small workpieces in a drilling or assembly fixture. Several MK20 bodies can be mounted side by side for multi-point clamping in a tight footprint, with the 30 mm stroke suiting short clamp travel.
Pick-and-place pusher
Push or eject parts sideways from a nest into a chute. The no-rotating plate stops the rod turning so an ejector blade stays aligned with the nest, and the 6-way mounting lets the cylinder be fixed from above or below the plate.
FAQ
What does the S at the end of MK20X30S mean?
The trailing S means this cylinder is supplied with a magnet, so switches seated in the slots around the body can detect piston position. MK20X30 without the S is the same cylinder without a magnet; the magnet is optional, never a standard feature.
How does the no-rotating plate help in use?
MK cylinders add a no-rotating plate, brass bushing and fixed rod that stop the piston rod from turning, so stopper pads and pusher plates stay aligned without an external anti-rotation guide. Overall dimensions and side-load ratings depend on the stroke, so confirm them from the datasheet.