Airtac MKJ Adjustable Cylinder MKJ20X60-50S
The AirTAC MKJ Adjustable Cylinder MKJ20X60-50S 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 MKJ20X60-50S
This MKJ model is AirTAC's no-rotating, adjustable-stroke multi-mount cylinder: a compact square body that fixes from six directions - front, back, left, right, top and bottom - and mounts side by side to save space on crowded machines. It is double acting, with a 20 mm bore, a 60 mm stroke and a 50 mm adjustable range as coded. At 0.5 MPa the theoretical push thrust is 157.1 N, speed is 30-500 mm/s, cushioning is by bumper, and the operating pressure is 0.15-1.0 MPa (22-145 psi).
You are ordering a genuine AirTAC part. The MK family's no-rotating plate, brass bushing and fixed rod stop the rod turning, unlike the standard MD series where rotation is allowed. The trailing S shows this SKU carries the magnet for switch sensing; the thread is PT by default. We confirm exact dimensions and sizing from the datasheet on request.
Airtac MKJ Adjustable Cylinder MKJ20X60-50S Technical Specifications
| Model | Airtac MKJ Adjustable Cylinder MKJ20X60-50S |
|---|---|
| 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
Size by thrust: this 20 mm bore gives 157.1 N theoretical push at 0.5 MPa in double acting - choose 32 mm (402.1 N) for heavier work or 16 mm (100.5 N) for lighter duties. MKJ suits jobs that need both a non-rotating rod and an adjustable stroke; the range is the figure after the hyphen in the model code. Double acting powers extend and retract; single-acting push or pull types and the double-rod MHD-style equivalents in the MK range cover other needs. The magnet is optional - here the S means it is included - and ports on this bore are M5x0.8, in PT or G thread. Remember the short cover discourages over-long strokes, and route any side-load question to us for a datasheet check.
Applications
Indexing on rotary tables
Bolt the cylinder to the top or bottom of a rotary indexing station to advance the index pawl; the no-rotating rod keeps the pawl aligned while the adjustable stroke sets the index depth.
Jig positioning under machine frames
Fix the body from the bottom face of a jig or fixture to lift and position workpieces; the 6-way mounting suits tight vertical space and the bumper softens the end of each stroke.
FAQ
Why choose an MKJ over a standard MD cylinder?
Two reasons: the MK family adds a no-rotating plate, bushing and fixed rod so the rod cannot turn - important for grippers, stoppers and indexing tools - and the J adds an adjustable stroke, here 50 mm per the code, so you can fine-tune travel without shimming. The standard MD is the non-rotating-free alternative where rotation is acceptable and stroke is fixed.
How is this cylinder cushioned at the ends of travel?
The MD/MK multi-mount series uses a bumper, not an adjustable air cushion. That gives a simple, compact end-of-stroke stop suitable for the 30-500 mm/s speed range of this double acting bore; for exact dimensions at your stroke, confirm from the datasheet.