Airtac MKJ Adjustable Cylinder MKJ20X30-30S
The AirTAC Airtac MKJ Adjustable Cylinder MKJ20X30-30S is a genuine MK multi-mount cylinder (adjustable stroke), 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, adjustable stroke
- 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 MKJ Adjustable Cylinder MKJ20X30-30S
The MKJ20X30-30S is an AirTAC MKJ multi-mount cylinder, a compact square-body pneumatic cylinder that can be fixed from 6 directions - front, back, left, right, top and bottom - and mounted side by side with other units to save space. It is a double acting, adjustable-stroke cylinder: a 20 mm bore pushing at 0.5 MPa delivers a theoretical 157.1 N of force, with a 30 mm base stroke plus a 30 mm adjustable range, so the end of stroke can be set within that extra travel. Cushioning is provided by a bumper. Magnetic-switch slots are arranged around the body for position sensing.
This is a genuine AirTAC part. The MK family is the no-rotating version of the MD standard multi-mount cylinder: a fixed rod and plate stop the piston rod from turning, which matters where the load must stay square to the body. As the SKU ends in S, this unit includes the magnet for switch detection; thread is PT by default. We confirm exact dimensions and sizing from the datasheet on request.
Airtac MKJ Adjustable Cylinder MKJ20X30-30S Technical Specifications
| Model | Airtac MKJ Adjustable Cylinder MKJ20X30-30S |
|---|---|
| Type | Multi-mount cylinder, adjustable stroke |
| 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
Size the bore for thrust: this 20 mm bore gives 157.1 N theoretical push at 0.5 MPa (the pull side is lower). Choose MK over MD when rod rotation must be prevented; MD is the standard multi-mount if rotation is acceptable. The MKJ adjustable-stroke variant is double acting and adds a 10, 20 or 30 mm adjustable range on top of the base stroke - this SKU adds the maximum 30 mm. Keep the base stroke within the bore 20 table (up to 60 mm), remembering the short covers mean over-long strokes should be avoided. The trailing S means the magnet is fitted for magnetic switch detection. Thread is PT by default, or G on request. Side-load capability is bore and mount dependent - confirm from the datasheet or ask us.
Applications
Pick-and-place part transfer
The no-rotating rod keeps gripped parts facing the same way between stations, while the magnet and body slots let switches signal extended and retracted positions. Side-by-side mounting suits dense tooling plates.
Gate and stopper positioning
On small conveyor or indexing lines, the compact square body fixes flush to machine frames, the bumper cushions each stop, and the fitted magnet confirms gate open or part-present status.
Jig positioning with end-position sensing
The 30 mm adjustable range sets the end of stroke for different part heights, the 6-direction fixing suits tight fixtures, and the magnet allows position feedback in automated jig and clamp circuits.
FAQ
What does the S at the end of MKJ20X30-30S mean?
The trailing S means this cylinder is supplied with the magnet in the piston, so magnetic switches placed in the slots around the body can detect rod position. The rest of the code decodes as: MKJ = no-rotating multi-mount, adjustable-stroke version; 20 = bore in mm; 30 = base stroke in mm; -30 = 30 mm adjustable range. It is double acting at 0.15-1.0 MPa (22-145 psi) with PT thread.
Can the stroke be set anywhere within the adjustable range?
Yes. The MKJ design gives a 30 mm base stroke plus a 30 mm adjustable range on top, so the effective end of stroke can be set within that extra travel. Keep the base stroke within the bore 20 standard table (up to 60 mm) and avoid over-long strokes given the short covers of this compact body. Exact overall dimensions and allowable side load depend on stroke and mounting - confirm from the datasheet or ask us.