Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X400-50S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X400-50S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø25mm bore and 400mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ25 mm
- Stroke400 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke
- Rod threadM10×1.25
- CushionFixed anti-impact bumper pads
- 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 MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X400-50S
Need a wide trim window on a long push? The MAJ25X400-50S runs double-acting air and lets you shave up to 50 mm off the extend stroke at the machine, no disassembly needed. Force at 0.5 MPa is 245.3 N extend and 206.1 N retract; 0.7 MPa lifts push to 343.4 N. Because 400 mm exceeds the 300 mm standard ceiling for bore 25, AirTAC winds this barrel as a made-to-order unit.
Inside is a riveted stainless round body with a 20 um hard-chrome rod - a build that shrugs off coolant mist and outdoor weather far better than painted aluminium minis. The fixed anti-impact bumper only decelerates; it is not the adjustable cushion the MAC family offers. With the magnet standard, a DMSG switch snaps on for end-of-stroke signals. Treat 147 N as the continuous work figure at 0.5 MPa and the seals will thank you.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X400-50S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X400-50S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 400 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | 1/8" |
| Rod thread | M10×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Fixed anti-impact bumper pads |
| Max standard stroke | Up to 300 mm |
Specifications follow the official AirTAC MA-series datasheet. Barrel: stainless-steel tube (round-body, riveted rolling-packed construction); piston rod: carbon steel with 20µm hard-chrome plating; covers: aluminium alloy. Thread options: PT (blank) / G / NPT. Every MA-series cylinder ships with a built-in magnet for CMSG / DMSG / EMSG position sensors.
Theoretical Output Force (Ø25mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 245 N | 206 N |
| 0.7 MPa | 344 N | 289 N |
| Max (@1.0 MPa) | 50 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X400-50S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×400 | Stroke length in mm. |
| -50 | Adjustable stroke window (mm the extend stroke can be shortened on site). |
| -S | Built-in magnet for CMSG / DMSG / EMSG sensors (standard on MA series). |
| CA / U / CM | Back-cover type: CA pivot, U flat-end, CM round-end. |
MA-family variants: MA / MAC (double acting ±cushion), MSA / MTA (single acting push / pull), MAD / MACD (double rod ±cushion), MAJ / MACJ (adjustable stroke ±cushion), MAR (cushioned with integrated F/U mount). Mounting accessories: FA flange, LB foot, SDB pivot; plus I and Y knuckles. Thread PT (blank) / G / NPT.
Where the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X400-50S Is Used
Case-stacker platen
Presses filled cartons square on a packing line; the wide 50 mm window absorbs tray-height variations between SKUs without re-plumbing.
Deep-draw part kicker
Kicks finished housings off a CNC conveyor at 343.4 N (0.7 MPa), tuned so each part clears the chute by the same margin.
Weld-cell clamp arm
Squeezes a fixture jig in a robotic welding cell; maintenance can back the stop off anywhere from 20 to 50 mm to fit new part sizes in minutes.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X400-50S the Right Cylinder?
Compare before committing: the MAJ20 delivers 157.0 N at 0.5 MPa for lighter gates, while the MAJ32 doubles the muscle at 402.2 N. On this model the 50 mm adjuster acts purely as an extend-direction end stop - it will not hold a load mid-stroke, and the rod still drifts if air pressure drops, so add a locking clamp where safety matters. Long 400 mm strokes amplify side load; guide the mass on rails or a cam rather than on the 10 mm rod. Bolt it down with an FA flange or LB foot, add an I or Y knuckle to the rod, and hang an EMSG switch on the magnet that ships inside.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) is standard for sensors
- ✓ Back cover (CA/U/CM) & mount (FA/LB/SDB)
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Do not dismantle the riveted front/back covers.
- check Bumper models: keep speed within the rated range.
- check Installation by qualified personnel per AirTAC docs.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X400-50S FAQ
At 0.5 MPa: 245.3 N push and 206.1 N pull. At 0.7 MPa: 343.4 N push and 288.5 N pull, with 50 kgf as the theoretical maximum at 1.0 MPa. Supply is 0.15-1.0 MPa (22-145 psi) and the 50 mm trim only shortens the extend stroke.
Choose the FA flange for face mounting or the LB foot for base mounting, and use I or Y rod knuckles on the moving end. The built-in magnet comes standard, so CMSG, DMSG or EMSG reed sensors mount directly on the barrel with no special piston order.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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