Airtac MDJ Adjustable Cylinder MDJ20X50-30S
The AirTAC Airtac MDJ Adjustable Cylinder MDJ20X50-30S 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 MDJ20X50-30S
The MDJ20X50-30S is an AirTAC multi-mount cylinder: a compact square-body, double-acting cylinder that can be fixed from six directions (front, back, left, right, top and bottom) and mounted side by side to save space. With a 20 mm bore it delivers about 157.1 N of theoretical push force at 0.5 MPa, and its 50 mm stroke carries a 30 mm adjustable range so end positions can be set precisely. Cushioning is a bumper, and magnetic-switch slots run around the body for position switches.
This is a genuine AirTAC part from the MD family, the standard multi-mount series in which rod rotation is not prevented (choose the MK family when the rod must not turn). As the SKU shows, this unit includes a magnet (trailing S). It runs on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), 30-500 mm/s, from -20 to 70 C. We confirm exact dimensions and sizing from the datasheet on request.
Airtac MDJ Adjustable Cylinder MDJ20X50-30S Technical Specifications
| Model | Airtac MDJ Adjustable Cylinder MDJ20X50-30S |
|---|---|
| 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
Bore sets the force: at 0.5 MPa this 20 mm bore pushes about 157.1 N (the pull side is lower), while 25 mm gives 245.4 N and 32 mm gives 402.1 N if you need more. Choose MD if the rod may rotate, or MK if rotation must be prevented. Acting options are MD double acting, MSD/MSK single push, MTD/MTK single pull, MDD/MKD double rod, and MDJ/MKJ adjustable stroke. A 20 mm bore runs strokes up to 60 mm; this model pairs a 50 mm stroke with a 30 mm adjustable range on top. A trailing S adds a magnet; the thread is PT as shown, with G available as an option. The compact covers caution against over-long strokes - route side-load and exact dimensions to us.
Applications
Small-part clamping on assembly fixtures
The 30 mm adjustable range lets the jig set the exact clamp point, and the 157.1 N push at 0.5 MPa holds small parts steady while screws are driven.
Jig positioning and locating
Fixed from the top or side of a welding or checking jig, the square body mounts side by side so multiple positioners fit in a tight fixture footprint.
Conveyor gate and stopper duty
The built-in magnet signals end-of-stroke to the PLC, while the 6-direction mounting lets the stopper be bolted to the conveyor frame from any face.
FAQ
What does the model code MDJ20X50-30S mean?
MDJ is AirTAC's adjustable-stroke, double-acting multi-mount cylinder; 20 is the bore in mm; 50 is the base stroke; -30 is the 30 mm adjustable range on top of that stroke; S means a magnet is built in; with no trailing thread letter the port thread is PT (M5x0.8 on this bore).
How many ways can I fix this cylinder, and how do I get exact dimensions?
The square body can be fixed from six directions - front, back, left, right, top and bottom - and units sit side by side to save space. Overall dimensions and the allowable side load vary with the stroke, so confirm them from the datasheet or ask us before designing the mounting.