Airtac MDJ Adjustable Cylinder MDJ20X25-20
The AirTAC Airtac MDJ Adjustable Cylinder MDJ20X25-20 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 MDJ20X25-20
The AirTAC MDJ20X25-20 is an adjustable-stroke, double acting multi-mount cylinder with a 20 mm bore, 25 mm nominal stroke and a 20 mm adjustable range. The compact square body fixes from 6 directions - front, back, left, right, top and bottom - and cylinders can be mounted side by side to save space, with magnetic-switch slots around the body and high guide precision. At 0.5 MPa the 20 mm bore develops a theoretical push thrust of 157.1 N (131.9 N on the pull side), cushioning is by bumper, and the cylinder runs at 30-500 mm/s on filtered air at 0.15-1.0 MPa (22-145 psi).
This is a genuine AirTAC part in the standard MD family - for applications where the rod must not turn, choose the MK no-rotating family instead. This SKU is built without a magnet; if you need position sensing via the body's switch slots, select the S-suffixed version. Dimensions, rod options and sizing for your fixture are confirmed from the datasheet on request.
Airtac MDJ Adjustable Cylinder MDJ20X25-20 Technical Specifications
| Model | Airtac MDJ Adjustable Cylinder MDJ20X25-20 |
|---|---|
| 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 20 mm bore when your clamp or positioner needs around 157.1 N of push at 0.5 MPa - step up to 25 or 32 mm bore for more thrust. This MDJ double acting adjustable-stroke variant gives a 25 mm stroke plus a 20 mm adjustment range on top; if you need a fixed stroke instead, look at the MD range, and the MK family if rod rotation must be prevented. Double acting strokes for this bore run up to 60 mm, but the short covers mean an over-long stroke is best avoided - confirm anything beyond standard from the datasheet, and route side-load questions to us. This SKU has no magnet (add S for one) and PT ports; a G thread option exists.
Applications
Small-parts clamping
The adjustable range lets you dial in the exact clamp position on a compact fixture where several cylinders must sit side by side in a tight envelope.
Jig positioning
Mounted from the top or side of a machining jig, the 6-direction fixing and bumper cushion give repeatable part location without extra lubrication.
Gate and stopper actuation
The 20 mm bore's 157.1 N push at 0.5 MPa is suited to swinging small gates or raising stoppers on a light assembly line, mounted flush in narrow frames.
FAQ
What does the '-20' at the end of MDJ20X25-20 mean?
It is the adjustable-stroke range: 20 mm on top of the 25 mm nominal stroke. MDJ cylinders let you set the effective stroke within that extra 10/20/30 mm window, which is why they are chosen over fixed-stroke MD cylinders when the exact end position must be tuned on the machine.
Can I mount this cylinder from any face of the body?
Yes. As a multi-mount cylinder it fixes from 6 directions - front, back, left, right, top and bottom - and bodies can be fixed side by side to save space. Keep the stroke within the recommended range for the bore, since the covers are short, and confirm side-load limits and exact dimensions from the datasheet before designing the fixture.