Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X80-40S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X80-40S 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 MAJ25X80-40S
Compact and clamp-ready, the MAJ25X80-40S drives an 80 mm stroke with a stop screw that trims the extend position by up to 40 mm without swapping cylinders. Its 25 mm bore yields 245.3 N of push at 0.5 MPa - figure on about 147 N for steady work - climbing to 343.4 N at 0.7 MPa.
Inside, a two-way heterogeneous piston seal holds grease against the stainless barrel wall, keeping breakout friction low after idle periods. The 10 mm hard-chrome rod, riveted aluminium covers and fixed bumper pads suit fast clamping cycles at up to 800 mm/s, and the standard magnet means a CMSG or DMSG switch confirms clamped status from day one.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X80-40S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X80-40S |
|---|---|
| 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 MAJ25X80-40S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×80 | Stroke length in mm. |
| -40 | 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 MAJ25X80-40S Is Used
CNC fixture clamp
Swings a clamp arm onto aluminium housings; the 40 mm window dials in clamp height for each fixture variant.
Cosmetic filler lid press
Presses snap caps onto 50 ml bottles at 343.4 N (0.7 MPa), with bumper-cushioned contact protecting the print.
ICT test nest ejector
Ejects PCBs from an in-circuit test nest; a CMSG switch on the standard magnet verifies full retract every cycle.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X80-40S the Right Cylinder?
If 245.3 N at 0.5 MPa overshoots your part, the 20 mm bore delivers 157.0 N; if you need over 400 N, the 32 mm bore gives 402.2 N. For clamps, pair the LB foot with an I or Y knuckle at the rod tip; the FA flange suits inline pushers. Feed 0.15-1.0 MPa (22-145 psi) air through the 1/8" port and thread the rod M10x1.25. The adjuster sets the extend end stop only - it will not lock the rod against a dropped air supply.
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 MAJ25X80-40S FAQ
At 0.5 MPa the cylinder pushes 245.3 N and pulls 206.1 N; at 0.7 MPa it reaches 343.4 N push and 288.5 N pull, with a theoretical 50.0 kgf at 1.0 MPa. Run it on 0.15-1.0 MPa (22-145 psi) air filtered to 40 um; proof pressure is 1.5 MPa (215 psi).
The -40 in the code means the extend stroke can be shortened anywhere within a 40 mm band using the external stop screw - it shortens, never lengthens past the ordered stroke. The screw is a mechanical stop, not a mid-stroke lock or brake, so the piston can still drift if air pressure drops.
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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