Airtac MKJ Adjustable Cylinder MKJ20X30-20
The AirTAC Airtac MKJ Adjustable Cylinder MKJ20X30-20 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 MKJ20X30-20
The MKJ20X30-20 is an AirTAC MKJ adjustable-stroke, no-rotating multi-mount cylinder with a 20 mm bore, 30 mm stroke and a 20 mm adjustable range. The compact square body fixes from six directions and mounts side by side with identical cylinders to save space, with magnetic-switch slots around the body. Double-acting operation on this bore produces a theoretical push force of 157.1 N at 0.5 MPa, cushioned by a bumper. It runs on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi) and -20 to 70 C.
This is a genuine AirTAC part. The MK family is the no-rotating multi-mount design - a plate, brass bushing and fixed rod keep the rod from turning - while the MD family is the standard version where rotation is allowed. This SKU does not carry a magnet; the trailing S option adds one. We confirm dimensions and sizing from the datasheet on request.
Airtac MKJ Adjustable Cylinder MKJ20X30-20 Technical Specifications
| Model | Airtac MKJ Adjustable Cylinder MKJ20X30-20 |
|---|---|
| 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
Choose the 20 mm bore for up to 157.1 N of push at 0.5 MPa (the pull side is lower). MKJ suits work where the rod must not rotate; MD is the standard choice when it may. The J code here adds a 20 mm adjustable range on top of the 30 mm stroke, within the bore-20 table (up to 60 mm); keep strokes short on this body rather than over-extending. Magnet is the trailing S option and thread is PT by default or G - route side-load questions to us.
Applications
Sorter divert stopper
Stop and square up parcels at a sorter divert: the fixed rod keeps the stop face aligned, and the 20 mm adjustable range matches varying package lanes without changing hardware.
Lab automation indexing
Index sample trays between stations on a compact benchtop line: side-by-side cylinders save deck space, the non-turning rod keeps tray locators true, and the adjustable range sets the index pitch.
Rotating-workpiece clamp
Clamp parts that must stay square during assembly or welding: the no-rotating plate prevents pad twist, and 6-way fixing lets the cylinder mount on whichever fixture face is free.
FAQ
How do I choose between the -10 and -20 adjustable ranges?
Both are 20 mm bore, 30 mm stroke MKJ cylinders; the difference is only the adjustable range added on top - 10 mm or 20 mm. Pick the range that covers the tuning you need for stop position or travel.
What stops the rod from turning, and what are the limits?
A no-rotating plate, brass bushing and fixed rod inside the MK body prevent rod rotation while still allowing full stroke. Keep the stroke sensible for the short cover, and confirm side-load capacity and exact dimensions from the datasheet.