Airtac MKJ Adjustable Cylinder MKJ20X50-30
The AirTAC Airtac MKJ Adjustable Cylinder MKJ20X50-30 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 MKJ20X50-30
The MKJ20X50-30 is a no-rotating multi-mount cylinder: a compact square-body AirTAC cylinder fixed from six directions (front, back, left, right, top and bottom) and mountable side by side to save space. The 20 mm bore and 50 mm stroke, extended by a 30 mm adjustable range, cover longer set-and-trim moves; the double-acting design produces about 157.1 N of theoretical push thrust at 0.5 MPa, with a bumper for cushioning.
This is a genuine AirTAC MK-family part, where a no-rotating plate, brass bushing and fixed rod stop the rod from turning. This SKU carries no magnet, as shown by the absence of the trailing S. We can confirm dimensions and sizing from the datasheet on request.
Airtac MKJ Adjustable Cylinder MKJ20X50-30 Technical Specifications
| Model | Airtac MKJ Adjustable Cylinder MKJ20X50-30 |
|---|---|
| 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
The 20 mm bore gives about 157.1 N theoretical push thrust at 0.5 MPa, a good fit for light clamping and positioning. MKJ combines the no-rotating MK design with double acting and a 30 mm adjustable range over the 50 mm stroke. If rotation is acceptable in your fixture, the standard MD family is the alternative; for a plain fixed stroke, choose the MK model.
The 50 mm stroke is within the 60 mm maximum for double-acting 20 mm bores, but avoid over-long strokes: the short covers mean long unsupported strokes can invite side-load problems, which we will help you assess from the datasheet. No magnet is fitted on this SKU; order the -30S variant if switch detection is needed. Ports are PT with M5x0.8 connection; G threading is available.
Applications
Jig positioning station
The adjustable 30 mm range lets you trim the engaged position of a positioning pin in a drill or weld jig without shims, and the rod cannot rotate so the pin stays oriented.
Part ejection after forming
Mounted side by side along a forming line, the square bodies eject finished small parts from fixtures, with six-direction fixing to suit any mounting face.
Vertical part lift in compact cells
Top or bottom fixing lets the cylinder lift small components vertically in a tight automation cell, while the no-rotating design keeps the lifted part facing forward.
FAQ
How does the 30 mm adjustable range work on the MKJ20X50-30?
The base stroke is 50 mm, and the MKJ adjustable-stroke design adds a 30 mm range on top, so you can set the effective stroke shorter within that span to match the fixture. The same code also tells you the variant: MKJ is no-rotating, double acting and adjustable; a plain MK would have a fixed stroke, and MD-family models allow rod rotation.
Is this cylinder suitable where the load might push sideways on the rod?
The MK design prevents rod rotation with a plate, brass bushing and fixed rod, and strokes beyond the short covers should be kept modest to avoid over-long unsupported rods. The allowable side load is not a listed figure here, so confirm the capability and exact dimensions for your layout from the datasheet or by contacting us.