Airtac MKJ Adjustable Cylinder MKJ20X50-40
The AirTAC MKJ Adjustable Cylinder MKJ20X50-40 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
- 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 MKJ20X50-40
The MKJ20X50-40 is an AirTAC multi-mount cylinder in the no-rotating MK family: a compact square body that can be fixed from six directions (front, back, left, right, top and bottom) and mounted side by side to save space. This double acting unit has a 20 mm bore, a 50 mm stroke plus a 40 mm adjustable range, and about 157.1 N theoretical push at 0.5 MPa. Cushioning is a bumper, the medium is air filtered to 40 um, proof pressure is 1.5 MPa (215 psi), and the operating range is -20 to 70 C (0 to 150 C only with the optional high-temperature seal material). Magnetic-switch slots run around the body, and the guide gives high precision without added lubricant.
This is a genuine AirTAC part. In the MK family a fixed rod, no-rotating plate and brass bushing stop the piston rod from turning, unlike the standard MD range where rod rotation is allowed. As the SKU shows, no magnet is fitted on this model. We can confirm dimensions and sizing from the datasheet on request.
Airtac MKJ Adjustable Cylinder MKJ20X50-40 Technical Specifications
| Model | Airtac MKJ Adjustable Cylinder MKJ20X50-40 |
|---|---|
| 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 | 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
Bore 20 in double acting gives 157.1 N theoretical push at 0.5 MPa (131.9 N on the pull side). Choose the MD range if rod rotation is acceptable, or this MK no-rotating version when the rod or an attached plate must stay square. Double acting strokes for bore 20 run up to 60 mm; this SKU is a 50 mm stroke with a 40 mm adjustable range, and the short covers mean an over-long stroke should be avoided. This SKU has no magnet; add the S suffix for magnetic-switch sensing. Threads are PT as standard, with the G suffix available. Side-load figures and exact dimensions are per the datasheet - ask us to confirm.
Applications
Adjustable jig stopper
The 40 mm adjustable range lets you fine-set the stop position on an assembly jig, while the no-rotating plate keeps the stop face square to the part.
Gate and diverter actuation
The square body mounts side by side on a conveyor frame and fixes from six directions, driving a slide gate in tight layouts.
FAQ
How does the model code MKJ20X50-40 decode?
MKJ is the AirTAC no-rotating, adjustable-stroke multi-mount cylinder, 20 is the bore in mm, 50 is the stroke in mm and -40 is the adjustable range on top of that stroke. The S suffix would add a magnet; this SKU has none. The thread is PT as standard, with G available as a suffix.
Where can I fix this cylinder?
The multi-mount square body can be fixed from six directions: front, back, left, right, top and bottom. It also mounts side by side with other units to save space. Overall dimensions vary with stroke, so confirm them from the datasheet, and check side-load limits with us before applying lateral force.