Airtac MKJ Adjustable Cylinder MKJ20X50-20
The AirTAC Airtac MKJ Adjustable Cylinder MKJ20X50-20 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
- MagnetWithout magnet
- 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 MKJ20X50-20
The MKJ20X50-20 is a genuine AirTAC multi-mount cylinder: a compact square-body air cylinder that can be fixed from 6 directions (front, back, left, right, top and bottom) and mounted side by side to save space. As an adjustable-stroke MK variant it is double acting, with a no-rotating plate, brass bushing and fixed rod that stop the piston rod from turning. The 20 mm bore delivers about 157.1 N theoretical push at 0.5 MPa, and the 50 mm stroke carries an extra 20 mm adjustable range, while cushioning is handled by a bumper.
This is a genuine AirTAC part. The MK family is the no-rotating version of the multi-mount range, unlike the standard MD family where rod rotation is allowed. This SKU is listed without a magnet, exactly as the code shows. Overall dimensions and sizing for your layout can be confirmed from the datasheet on request.
Airtac MKJ Adjustable Cylinder MKJ20X50-20 Technical Specifications
| Model | Airtac MKJ Adjustable Cylinder MKJ20X50-20 |
|---|---|
| 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 | Without magnet |
| 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
Choose the 20 mm bore when you need roughly 157.1 N of theoretical push at 0.5 MPa. Pick MKJ over MDJ if the rod or tooling must not rotate. This unit is double acting with a 50 mm base stroke plus a wider 20 mm adjustable range, useful when the final stroke is not yet fixed at design time. Keep strokes modest, because the short cover design limits how long a stroke the body can accept. No magnet is fitted on this code; choose an S-suffix code if switch detection is needed. Thread is PT by default; G is available. Side-load ratings and dimensions should be confirmed from the datasheet.
Applications
Vertical indexing lifts
The fixed rod prevents the lifting plate from spinning under load, the adjustable 20 mm range suits indexing tables whose increment may change, and the body mounts from the top or bottom face.
Pallet sensor-gate actuation
Non-rotating rod action keeps pallet-detect gates square as they swing or slide, and the compact body bolts to the conveyor frame from whichever of the 6 faces is accessible.
Lab automation part stops
In compact lab automation, the side-by-side mounting packs several stopper cylinders into tight footprints, and the adjustable range tunes the stop position per recipe.
FAQ
Should I choose MDJ or MKJ for this application?
Both are adjustable-stroke multi-mount cylinders with the same 20 mm bore thrust, about 157.1 N theoretical push at 0.5 MPa. The difference is rotation: MDJ is the standard family where the rod can rotate, while MKJ, as in the MKJ20X50-20, has a no-rotating plate, brass bushing and fixed rod that prevent rod rotation. Choose MKJ whenever the tooling must stay square.
Why does the 20 mm adjustable range matter, and what limits it?
The MKJ20X50-20 offers a 50 mm base stroke plus a 20 mm adjustable range, so you can set the effective stroke anywhere within that extra window, which is useful when the exact stroke is finalised after installation. The short cover design means very long strokes should be avoided in this body style, and overall dimensions per stroke should be confirmed from the datasheet.