Airtac MDJ Adjustable Cylinder MDJ25X40-20S
The AirTAC Airtac MDJ Adjustable Cylinder MDJ25X40-20S is a genuine MD multi-mount cylinder (adjustable stroke), 25 mm bore. Its compact square body fixes from six directions and mounts side by side to save space. It delivers about 245.4 N of push force at 0.5 MPa. A bumper cushions the impact.
- TypeMulti-mount, adjustable stroke
- SeriesMD (standard)
- Bore25 mm
- Push thrust @0.5 MPa245.4 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 MDJ25X40-20S
The MDJ25X40-20S is an adjustable-stroke, double acting AirTAC multi-mount cylinder with a 25 mm bore, 40 mm main stroke and an extra 20 mm adjustable range. Multi-mount bodies fix from six directions (front, back, left, right, top and bottom), so several 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 25 mm bore delivers about 245.4 N of theoretical push force, and cushioning is provided by a bumper rather than an air cushion.
This is a genuine AirTAC part from the MD family, the standard multi-mount design where piston rotation is not prevented - for a non-rotating rod, choose the MK family instead. The trailing S in the code means this SKU comes WITH a magnet for magnetic-switch detection. Port thread is PT (M5x0.8 on this bore). We confirm exact dimensions and sizing from the AirTAC datasheet on request before you order.
Airtac MDJ Adjustable Cylinder MDJ25X40-20S Technical Specifications
| Model | Airtac MDJ Adjustable Cylinder MDJ25X40-20S |
|---|---|
| Type | Multi-mount cylinder, adjustable stroke |
| Series | MD (standard) |
| Bore | 25 mm |
| Push thrust @0.5 MPa | 245.4 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
The 25 mm bore gives about 245.4 N theoretical push at 0.5 MPa in double acting use, so check it against your load before ordering. MD is the standard multi-mount (rotation allowed); MK versions prevent rod rotation. This model is adjustable-stroke double acting: 40 mm main stroke plus a 20 mm adjustable range on top. Double acting strokes for the 25 mm bore run up to 60 mm - the short-cover design cautions against over-long strokes. The trailing S adds the magnet; non-S codes ship without. Thread is PT as shown, with G available as the alternative option. Side-load ratings and stroke-specific dimensions come from the datasheet - ask us.
Applications
Indexing fixture positioning
Bolt the body through its six-direction fixing and set the 20 mm adjustable range to dial in repeatable stop positions on a small indexing fixture without changing cylinders.
Small-parts clamping
Side-by-side mounting lets you line up several 25 mm bore cylinders to clamp small parts in a compact fixture, each delivering about 245.4 N push at 0.5 MPa.
Slide transfer between stations
The 40 mm stroke plus 20 mm adjustment covers part-to-station movement on compact transfer slides where mounting space is limited and switches are read via the built-in magnet.
FAQ
What does the 40-20 in MDJ25X40-20S mean?
The code decodes as an adjustable-stroke (MDJ) double acting multi-mount cylinder with a 25 mm bore, 40 mm main stroke and a 20 mm adjustable range added on top. The trailing S means this SKU includes the magnet, and the thread is PT by default.
Can I mount this cylinder from any face?
Yes. The multi-mount square body fixes from six directions - front, back, left, right, top and bottom - and cylinders can be mounted side by side to save space. For stroke-specific overall dimensions and side-load limits, confirm from the datasheet or ask us.