Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X80-20S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X80-20S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø25mm bore and 80mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ25 mm
- Stroke80 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 MAJ25X80-20S
A 20 mm trim window makes this 25 mm bore MAJ the pick when the exact stop position is decided on the machine rather than on the drawing. The MAJ25X80-20S is double-acting and round-bodied, pushing 245.3 N at 0.5 MPa, with a stainless barrel riveted to aluminium covers for a slim, washdown-friendly body.
The fixed anti-impact pad at each stroke end softens deceleration - it is not an adjustable air cushion, so for metered cushioning look at the MACJ family instead. Plan on about 147 N of usable push at 0.5 MPa rather than the full 245.3 N rating; that 2:1 margin absorbs friction and wear over the cylinder's life.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X80-20S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X80-20S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 80 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 MAJ25X80-20S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×80 | Stroke length in mm. |
| -20 | 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 MAJ25X80-20S Is Used
Belt-line tote stopper
Stops totes at a pick station between conveyor lanes; the 20 mm window soaks up belt tracking tolerances from shift to shift.
Bench jig hold-down
Clamps aluminium extrusion blocks flat during drilling on a machine-shop bench, with the trim screw set once for the jig height.
Packaging eject gate
Kicks reject packs off a horizontal flow wrapper; a DMSG switch on the stainless barrel confirms the gate actually reached the stop.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X80-20S the Right Cylinder?
Compare forces first: the next bore down, 20 mm, gives 157 N at 0.5 MPa, while stepping up to 32 mm buys 402.2 N - choose by load, not by looks. The -20 adjuster sets a firm mechanical stop on extension; it will not lock the rod mid-stroke or against drift when air is lost. Fit with FA or LB mounts, add I or Y knuckles for pivoting links, and expect 1/8" ports plus an M10x1.25 male rod thread.
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 MAJ25X80-20S FAQ
Double acting at 0.5 MPa it pushes 245.3 N and pulls 206.1 N; at 0.7 MPa that rises to 343.4 N push and 288.5 N pull, with 50 kgf the theoretical maximum at 1.0 MPa. Operating range is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), and travel speed spans 30-800 mm/s.
No - the MAJ carries fixed anti-impact bumper pads that only soften the final contact; they cannot be metered like an air cushion. If the line needs tunable deceleration, AirTAC's MACJ cylinders add adjustable cushions in the same mini format.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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