Airtac MKJ Adjustable Cylinder MKJ20X50-30S
The AirTAC Airtac MKJ Adjustable Cylinder MKJ20X50-30S 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 MKJ20X50-30S
The MKJ20X50-30S is a no-rotating multi-mount cylinder: a compact square-body AirTAC cylinder you can fix from six directions (front, back, left, right, top and bottom) and mount side by side to save space. Its 20 mm bore delivers about 157.1 N of theoretical push thrust at 0.5 MPa in double acting, and the 50 mm stroke with a 30 mm adjustable range covers both fixed and trimmed moves. Cushioning is a bumper.
A genuine AirTAC part, this MK-family model uses a no-rotating plate, brass bushing and fixed rod to keep the rod from turning. The trailing S shows the magnet is included on this SKU, and magnetic-switch slots run around the body. Dimensions and sizing can be confirmed from the datasheet on request.
Airtac MKJ Adjustable Cylinder MKJ20X50-30S Technical Specifications
| Model | Airtac MKJ Adjustable Cylinder MKJ20X50-30S |
|---|---|
| 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
For loads in the region of 157.1 N theoretical push at 0.5 MPa, the 20 mm bore is the right pick. MKJ gives you the no-rotating MK design, double acting and a 30 mm adjustable range over the 50 mm stroke, useful when the final stroke must be tuned on the machine. Where rod rotation is acceptable, compare with the standard MD family; for a fixed stroke, use the plain MK.
The 50 mm stroke is inside the 60 mm limit for double-acting 20 mm bores, but keep strokes as short as the job allows: the compact covers make over-long strokes vulnerable to side-load issues, which we can check against the datasheet. The S suffix includes the magnet for position detection. Ports are M5x0.8 with PT thread; G is an option.
Applications
Conveyor diverter gate
The non-rotating rod drives a diverter gate square across a conveyor lane to route small parts, and the six-way fixing adapts to any frame face in a compact line.
Pick-and-place end effector
With the magnet detecting end positions and the rod held from turning, the cylinder drives a gripper plate for placing small parts, mounted side by side in dense multi-arm cells.
Adjustable part stopper
The 30 mm adjustable range sets the stopper position to suit different part sizes on an assembly line, with the bumper giving a soft, quiet stop on arrival.
FAQ
Why choose MKJ20X50-30S over a standard MD cylinder of the same bore?
The MKJ is from the MK family, so a no-rotating plate, brass bushing and fixed rod stop the rod from turning - important for gates, stoppers and gripper plates that must stay square. It is also adjustable-stroke (30 mm of adjustment over the 50 mm stroke) and this SKU includes the magnet (trailing S). The MD family is the standard multi-mount choice when rotation is allowed.
Where is the magnetic switch sensed, and what about the 150 C rating?
The magnet on this S-suffix model works with the magnetic-switch slots around the square body, so sensors mount directly on the cylinder. As standard the cylinder covers -20 to 70 C; operation up to 150 C is possible only with the optional high-temperature seal material. For exact dimensions and side-load limits, confirm from the datasheet.