Airtac MDJ Adjustable Cylinder MDJ20X50-20S
The AirTAC Airtac MDJ Adjustable Cylinder MDJ20X50-20S 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
- 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 MDJ Adjustable Cylinder MDJ20X50-20S
The AirTAC MDJ is a compact multi-mount cylinder with a square body that fixes from 6 directions - front, back, left, right, top and bottom - and mounts side by side with other cylinders to save space. This MDJ20X50-20S is the adjustable-stroke, double acting version: a 20 mm bore with about 157.1 N theoretical push at 0.5 MPa, a 50 mm main stroke and an extra 20 mm adjustable range. Cushioning is a bumper, magnetic-switch slots run around the body, and no added lubricant is needed.
This is a genuine AirTAC part. MD is the standard multi-mount family, where the rod can rotate; the MK family is the no-rotating alternative that stops rod turn with a plate. The trailing S means this SKU includes the position magnet for 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 MDJ20X50-20S Technical Specifications
| Model | Airtac MDJ Adjustable Cylinder MDJ20X50-20S |
|---|---|
| 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 | 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
Size the bore by thrust: at 0.5 MPa this 20 mm double acting bore gives about 157.1 N theoretical push and 131.9 N pull. Choose MD when rod rotation is acceptable and MK when it must be prevented. Acting options are double acting (MD/MK), single acting push (MSD/MSK), single acting pull (MTD/MTK), double rod (MDD/MKD) and adjustable stroke (MDJ/MKJ). The 50 mm stroke here is within the 60 mm maximum for double acting 20 mm bores, with a 20 mm adjustable range on top. The trailing S means the magnet is included - select a code without S to omit it. Thread is PT by default or G; this SKU is PT. Respect the short compact cover when setting strokes, and check side-load figures with us before applying side loads.
Applications
Part presence stopper
Stop parts at a check station on a conveyor. The built-in magnet lets reed or Hall switches in the body slots signal cylinder position for line control.
Pick-and-place indexing
Advance parts one station at a time on a small indexing or transfer unit. Side-by-side mounting keeps several cylinders in a compact manifold row.
Fixture clamping
Clamp workpieces in a drilling or press jig with about 157.1 N push at 0.5 MPa. The bumper cushions the end of stroke and the body fixes from 6 directions.
FAQ
What does the S at the end of MDJ20X50-20S mean?
The trailing S means this cylinder includes the position magnet, so magnetic switches seated in the body slots can detect piston position. Codes without the S are supplied without a magnet. The rest of the code reads MDJ adjustable-stroke double acting multi-mount, 20 mm bore, 50 mm stroke, plus a 20 mm adjustable range, with PT thread.
How many ways can I mount this cylinder?
The multi-mount square body can be fixed from 6 directions - front, back, left, right, top and bottom - and cylinders can sit side by side to save space. Overall dimensions vary with stroke, so confirm exact sizes from the datasheet before designing the mounting.