Airtac MDJ Adjustable Cylinder MDJ20X30-20S
The AirTAC Airtac MDJ Adjustable Cylinder MDJ20X30-20S 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 MDJ20X30-20S
The MDJ20X30-20S is an AirTAC adjustable-stroke multi-mount cylinder with a compact square body that fixes from 6 directions and can be mounted side by side to save space, with magnetic-switch slots around the body for high guide precision without added lubricant. This model has a 20 mm bore, 30 mm base stroke and a 20 mm adjustable range, double acting, delivering about 157.1 N theoretical push force at 0.5 MPa. Cushioning is a bumper.
This is a genuine AirTAC part in the standard MD family, so it does not prevent rod rotation; choose the MKJ series for a no-rotating version. As the SKU shows, this model is supplied with a magnet for position-sensing switches. Dimensions and sizing depend on stroke, so we confirm exact figures from the datasheet on request.
Airtac MDJ Adjustable Cylinder MDJ20X30-20S Technical Specifications
| Model | Airtac MDJ Adjustable Cylinder MDJ20X30-20S |
|---|---|
| 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 for thrust: 20 mm bore gives about 157.1 N push and 131.9 N pull at 0.5 MPa in double acting. Use MD where rod rotation is tolerable and MK where it is not. Acting choices are double, single push, single pull, double rod or adjustable stroke; this MDJ is double acting with a 30 mm base stroke plus a 20 mm adjustable range, within a bore 20 double-acting table that runs to 60 mm, so respect the short cover when setting travel. The S suffix means the piston carries a magnet for switch sensing. Thread is PT as standard or G on request, with an M5x0.8 port at bore 20. Send us side-load requirements and we will verify them from the datasheet.
Applications
Pick-and-place heads
Fix the body from any of the 6 directions on a compact pick-and-place head and use the magnet to signal end positions, with the adjustable stroke trimming grip travel per product.
Indexing fixture actuation
Line up multiple MDJ bodies side by side on an indexing fixture and adjust each stroke by up to 20 mm to lock and release workholders in sequence without changing hardware.
Vertical eject or lift station
Mount the cylinder under or beside a small lift station in a tight panel and rely on the magnet for home detection while the bumper cushions each 30 mm stroke.
FAQ
Why does MDJ20X30-20S have an S on the end, and does it matter?
The S means the piston is built with a magnet, so magnetic switches can be seated in the slots around the body to sense position. The same cylinder without the S, MDJ20X30-20, has no magnet. The magnet is optional on this series and is fitted only when the SKU shows it.
Can I use this cylinder for side-loading, and how should I mount it?
The body fixes from 6 directions and units mount side by side, which is ideal for compact layouts, but the cylinder is intended for in-line thrust of about 157.1 N push at 0.5 MPa. Side-load limits and exact dimensions depend on the stroke, so confirm from the datasheet or ask us before designing the fixture.