Airtac MKJ Adjustable Cylinder MKJ20X40-10S
The AirTAC Airtac MKJ Adjustable Cylinder MKJ20X40-10S 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 MKJ20X40-10S
The MKJ20X40-10S is a compact square-body multi-mount cylinder from AirTAC's no-rotating MK family, fixed from six directions - front, back, left, right, top and bottom - so units mount side by side to save space. Magnetic-switch slots run around the body. This double-acting unit has a 20 mm bore producing a theoretical 157.1 N push at 0.5 MPa (131.9 N on the pull side), runs at 30-500 mm/s, cushions with a bumper, and adds a 10 mm adjustable range to the 40 mm stroke.
This is a genuine AirTAC part. MK cylinders add a no-rotating plate, brass bushing and fixed rod so the rod cannot turn, unlike the standard MD family. The trailing S shows this SKU includes the magnet; codes without S come without one. Medium is air filtered to 40 um, working pressure is 0.15-1.0 MPa for this bore, and temperature is -20 to 70 C (0-150 C only with the optional high-temperature seal material). Ask us to confirm dimensions and sizing from the datasheet.
Airtac MKJ Adjustable Cylinder MKJ20X40-10S Technical Specifications
| Model | Airtac MKJ Adjustable Cylinder MKJ20X40-10S |
|---|---|
| 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
Bore drives force: this 20 mm bore gives 157.1 N push and 131.9 N pull at 0.5 MPa, double acting, at 30-500 mm/s with a bumper cushion. MK beats MD where rotation must be prevented - the no-rotating plate and fixed rod hold the rod square; standard MD allows rotation. The J variant stacks a 10/20/30 mm adjustable range on the stroke; this unit has 10 mm. Keep strokes inside the bore's table (double-acting bore 20 reaches 60 mm) and avoid over-long strokes that thin out the cover; send side-load questions to us. The trailing S includes the magnet; without S the cylinder comes unmagnetized. Thread on the M5x0.8 port is PT here, or G if ordered with the G suffix.
Applications
Palletized small-parts clamping
Clamping small housings into a pallet for transfer between stations. The magnet enables end-position sensing between cycles, and side-by-side mounting puts a clamp at each nest without spreading the fixture footprint.
Index table part stop
A stopper pin on a rotary index that squares each part before the station cycles. The no-rotating plate keeps the pin from twisting, and the 10 mm adjustable range fine-tunes the stop height.
Slide unit end-positioning
Cushioned positioning of a small slide where the tool orientation matters. The fixed rod prevents the slide spinning under side play, and six-direction mounting bolts the cylinder straight onto the slide rail top.
FAQ
Why choose the MKJ20X40-10S over a standard MD cylinder of the same bore?
The MK family is the no-rotating type: a plate, bushing and fixed rod stop the piston rod from turning, so attached tooling stays oriented. The J adds a 10/20/30 mm adjustable range, and the S confirms a magnet is fitted for switch detection. An MD of the same bore allows rod rotation.
Where do I find dimensions and side-load limits for this cylinder?
Overall dimensions change with the stroke and the adjustable range, so they are listed per model in the datasheet rather than as general specs. The same applies to allowable side-load. Contact us and we will pull the exact figures for the MKJ20X40-10S for you.