Airtac MKJ Adjustable Cylinder MKJ20X20-20
The AirTAC Airtac MKJ Adjustable Cylinder MKJ20X20-20 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 MKJ20X20-20
The MKJ20X20-20 is an AirTAC MK-family adjustable-stroke multi-mount cylinder: a compact square-body, double-acting unit that fixes from 6 directions (front, back, left, right, top and bottom) and mounts side by side to save space on crowded fixtures. The 20 mm bore produces a theoretical 157.1 N push thrust at 0.5 MPa (131.9 N pulling), and the 20 mm stroke carries a 20 mm adjustable range so the effective travel can be set at the machine. Cushioning is a bumper, and magnetic-switch slots run around the body.
This is a genuine AirTAC part. The MK line is the no-rotating version of the MD multi-mount family - a plate, brass bushing and fixed rod stop the rod from turning so linked tooling holds its orientation. This SKU has no S suffix, so it is supplied without a magnet; a magnet-equipped version exists if sensing is added later. We confirm dimensions and sizing from the datasheet on request.
Airtac MKJ Adjustable Cylinder MKJ20X20-20 Technical Specifications
| Model | Airtac MKJ Adjustable Cylinder MKJ20X20-20 |
|---|---|
| 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
Start with the bore: at 0.5 MPa this 20 mm bore gives 157.1 N push and 131.9 N pull in double-acting service, across a 0.15-1.0 MPa operating range. Choose MK when the rod must not rotate; choose MD when rotation is acceptable. Acting choices are double acting, single push (MSK), single pull (MTK), double rod (MKD) and adjustable-stroke (MKJ, as here). This bore takes strokes up to 60 mm in the standard table, and the J build adds a 10/20/30 mm adjustable range - this SKU carries the 20 mm range on a 20 mm stroke. No S in the code means no magnet; the port thread is PT as standard or G to order. Avoid stretching the stroke close to the covers, and check side-load needs with us first.
Applications
Indexing table lock
Bolted to the frame of a rotary indexing station, the adjustable range lets the engineer set exactly where the no-rotating platen engages, locking each station in the same orientation every cycle.
Line divert stopper
Mounted top-down through a conveyor side rail, the cylinder drops a stop blade that will not twist, holding parts square; side-by-side mounting covers multiple lanes from one compact strip.
Fixture eject position
Fixed from the rear of an assembly fixture, the cylinder pushes finished small parts off the nest, with the adjustable range tuned so the eject face lands at the right height each shot.
FAQ
Does MKJ20X20-20 include a magnet?
No. The code has no trailing S, so this cylinder is supplied without a magnet, and the listing does not claim one. The S-suffixed version of the same model carries the magnet; if you need position sensing later, order that variant or check the datasheet for the switch arrangement.
Why keep the stroke away from the covers, and where are the exact dimensions?
Multi-mount bodies are compact, so an over-long stroke relative to the short covers is best avoided when selecting - stay within the bore's stroke table, here up to 60 mm for 20 mm bore, with the J variant's adjustable range added on top. Exact overall dimensions vary with stroke, so confirm them from the datasheet or ask us.