Airtac MKJ Adjustable Cylinder MKJ20X15-20S
The AirTAC Airtac MKJ Adjustable Cylinder MKJ20X15-20S 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 MKJ20X15-20S
The MKJ20X15-20S is an AirTAC MKJ adjustable-stroke multi-mount cylinder: a compact square-body, no-rotating, double-acting cylinder with a 20 mm bore, a 15 mm base stroke, a 20 mm adjustable range and a built-in magnet. The body fixes from six directions and mounts side by side, so dense actuation fits into tight fixtures. At 0.5 MPa it produces about 157.1 N of theoretical push thrust, and the bumper cushions the stroke across a 30-500 mm/s speed range.
This is a genuine AirTAC part. The MK family's no-rotating plate, brass bushing and fixed rod keep the rod from turning, which matters where orientation must hold. As the SKU shows, the trailing S means this cylinder is supplied with a magnet for switch sensing. Operating pressure is 0.15-1.0 MPa (22-145 psi), media temperature -20 to 70 C (150 C only with the optional high-temperature seal material). We confirm dimensions and sizing from the datasheet on request.
Airtac MKJ Adjustable Cylinder MKJ20X15-20S Technical Specifications
| Model | Airtac MKJ Adjustable Cylinder MKJ20X15-20S |
|---|---|
| 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
Pick the 20 mm bore for about 157.1 N of push at 0.5 MPa - step up or down a bore if your load needs more or less thrust. The MKJ adjustable stroke gives a 15 mm base stroke plus a 20 mm adjustment band, so one cylinder covers several setup positions without hardware changes. Double acting gives powered motion both ways.
This is the MK (no-rotating) family - rotation is prevented; the MD family suits jobs where rotation is acceptable. The trailing S means a magnet is fitted for position sensing; the same part without the S has no magnet. Threads are PT by default, with G available. Keep strokes within the bore's table (up to 60 mm for a 20 mm double-acting bore) because of the short covers, and ask us about side-load capability.
Applications
Switch-sensed gate control
The built-in magnet lets reed or Hall-effect switches verify open and closed positions on a small gate or diverting mechanism, mounted flush from any of six faces.
Orientation-critical stops
Use the fixed, non-rotating rod as a stopper or aligner on a conveyor, keeping flat parts square as they index past the station.
Height-adjustable lift points
Tune lift height within the 20 mm adjustable range for lift-and-lower checks on small assemblies, packing several cylinders side by side under a fixture plate.
FAQ
What does the S in MKJ20X15-20S mean?
The trailing S means this cylinder is supplied with a magnet, so magnetic switches can be seated in the slots around the body to sense rod position. The same model without the S (MKJ20X15-20) has no magnet. The rest decodes as MKJ no-rotating adjustable-stroke, 20 mm bore, 15 mm stroke with a 20 mm adjustable range, double acting, PT threads.
Can I mount this cylinder in any orientation?
Yes - the square body fixes from six directions: front, back, left, right, top and bottom. It also mounts side by side to save space. Keep strokes within the bore's table given the short covers, and confirm exact dimensions and side-load limits from the datasheet before finalizing the layout.