Airtac MKJ Adjustable Cylinder MKJ20X50-50S
The AirTAC MKJ Adjustable Cylinder MKJ20X50-50S is a genuine MK multi-mount cylinder (double rod, 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, double rod, 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 MKJ20X50-50S
The MKJ20X50-50S is an adjustable-stroke, no-rotating multi-mount cylinder from AirTAC's MK family. Its square body fixes from six directions - front, back, left, right, top and bottom - and units can be mounted side by side to save space, with magnetic-switch slots machined around the body.
This is a genuine AirTAC part. MK (rather than MD) means the piston rod is prevented from turning by a no-rotating plate, bushing and fixed rod; typical materials are an aluminium-alloy body, stainless or S45C rod and NBR seals - confirm bore-specific detail from the datasheet. The trailing S shows this SKU is supplied with a magnet for switch detection. Overall dimensions vary with stroke; we confirm sizing from the datasheet on request.
Airtac MKJ Adjustable Cylinder MKJ20X50-50S Technical Specifications
| Model | Airtac MKJ Adjustable Cylinder MKJ20X50-50S |
|---|---|
| Type | Multi-mount cylinder, double rod, 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
MKJ gives adjustable stroke on a double-acting cylinder, and choosing MK over MD means rod rotation is prevented rather than allowed. Stroke is 50 mm; a short cover keeps this compact body from accepting an over-long stroke, and AirTAC's standard MKJ adjustable ranges are 10, 20 or 30 mm, so confirm the -50 code against the datasheet with us. Add S for a magnet and select PT or G thread (PT on this SKU). Side-load limits come from the datasheet - ask us.
Applications
Small-parts clamp
Side-by-side mounting lets a row of clamp cylinders sit on one tight fixture, while the fixed rod keeps each pad square to the part it grips.
Conveyor gate stopper
Mounted top or side, the non-turning rod drives a stopper gate that stays level as it drops to hold singulated parts on the line.
Jig positioning
Six-direction fixing makes it easy to bolt the cylinder into a machining or assembly jig wherever the layout needs a push or a locator.
FAQ
What does the -50 in MKJ20X50-50S mean?
MKJ is AirTAC's adjustable-stroke version of the MK multi-mount cylinder: the 20 mm bore gives 50 mm of stroke, and the -50 value is the coded adjustable-stroke figure. AirTAC's standard MKJ adjustable ranges are 10, 20 or 30 mm, so we recommend confirming this -50 code against the datasheet with us before ordering.
How does no-rotating help in a real machine?
The MK body adds a no-rotating plate, bushing and fixed rod so the piston rod cannot turn. That keeps pads, gates and cradles aligned without building an external anti-rotation guide, and the square body still fixes from all six directions. Overall dimensions and allowable side-load come from the datasheet - ask us for the exact stroke.