Airtac MDJ Adjustable Cylinder MDJ20X50-20
The AirTAC Airtac MDJ Adjustable Cylinder MDJ20X50-20 is a genuine MD 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.
- TypeMulti-mount, adjustable stroke
- SeriesMD (standard)
- 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 MDJ Adjustable Cylinder MDJ20X50-20
The AirTAC MDJ is a compact multi-mount cylinder: a square body that can be fixed from 6 directions - front, back, left, right, top and bottom - and placed side by side with neighbouring cylinders to save space on machines and manifolds. This MDJ20X50-20 is the adjustable-stroke, double acting version with a 20 mm bore, a 50 mm main stroke and an extra 20 mm adjustable range you can set after installation, giving about 157.1 N theoretical push at 0.5 MPa. Cushioning is a bumper, magnetic-switch slots run around the body, and no added lubricant is required.
This is a genuine AirTAC part. MD is the standard multi-mount family, where the rod is free to rotate; the MK family is the separate no-rotating design with a plate that stops rod turn. This SKU is supplied without the position magnet - choose the S-suffixed version if you need switch detection. The medium is air filtered to 40 um, and we confirm exact dimensions and sizing details from the AirTAC datasheet on request.
Airtac MDJ Adjustable Cylinder MDJ20X50-20 Technical Specifications
| Model | Airtac MDJ Adjustable Cylinder MDJ20X50-20 |
|---|---|
| Type | Multi-mount cylinder, adjustable stroke |
| Series | MD (standard) |
| 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 bore by thrust: at 0.5 MPa a 20 mm double acting bore gives about 157.1 N theoretical push and 131.9 N pull. Pick MD if rod rotation is acceptable and MK if the rod must not turn. Acting choices are double acting (MD/MK), single acting push (MSD/MSK), single acting pull (MTD/MTK), double rod (MDD/MKD) and adjustable stroke (MDJ/MKJ). This code carries a 50 mm stroke, inside the 60 mm maximum for double acting 20 mm bores, plus a 20 mm adjustable range. Trailing S adds the magnet; this SKU has none. The port thread is PT by default, with G available - here it is PT. Keep strokes within the short-cover design of this compact cylinder and route any side-load figures to us before applying side loads.
Applications
Small-parts clamping
Clamp small housings or brackets at an assembly station. The 157.1 N push at 0.5 MPa and 50 mm stroke suit light clamping, and the square body fixes from 6 directions to fit tight fixtures.
Jig positioning
Position jigs and workpieces on a machine table. Several cylinders can be mounted side by side in a compact row, and the adjustable range lets you trim the final position.
Conveyor stopper gate
Rise to stop parts at a hold point on a conveyor line. The added 20 mm adjustable range lets you fine-tune the stop position without repositioning the cylinder body.
FAQ
What does the MDJ20X50-20 code mean?
MDJ is the AirTAC adjustable-stroke double acting multi-mount cylinder, 20 is the 20 mm bore, 50 is the 50 mm main stroke, and -20 is the extra 20 mm adjustable range added on top. No trailing S means this SKU has no position magnet, and no trailing G means PT thread. If you want switch detection, order the S version.
Can this cylinder take side loads, and what are its exact dimensions?
Side-load limits and overall dimensions depend on the stroke and mounting, so they are not quoted here. Confirm both from the AirTAC datasheet - we can send it and help with sizing on request.