Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X45-40S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X45-40S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø25mm bore and 45mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ25 mm
- Stroke45 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 MAJ25X45-40S
Built around a riveted stainless round body, the MAJ25X45-40S is double-acting and lets a technician shorten the extend stroke by up to 40 mm with an on-machine stop screw - no shims and no cylinder swaps between jobs. The 10 mm carbon-steel rod carries 20 um of hard chrome, and the standard built-in magnet accepts CMSG, DMSG and EMSG switches off the shelf.
This bore pushes 245.3 N and returns 206.1 N at 0.5 MPa (343.4 N and 288.5 N at 0.7 MPa; 50 kgf theoretical peak), with speed 30-800 mm/s and pressure 0.15-1.0 MPa (22-145 psi). Read vertically, the 2:1-margin figure means the cylinder lifts about 12.5 kg at 0.5 MPa, so match tray, lid or clamp weights against that number. Fixed anti-impact pads, not adjustable cushions, absorb the stroke-end shock.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X45-40S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X45-40S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 45 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 MAJ25X45-40S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×45 | 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 MAJ25X45-40S Is Used
Magazine tray ejector
Lifts PCB trays clear of a soldering-line stacker; with 245.3 N push and a practical 12.5 kg vertical-lift margin, tray stacks stay well inside the rating.
Dial-table clamp
Clamps small zinc castings on a rotary indexing table, where the 40 mm trim range lets operators set clamp height per casting without shimming.
Autosampler pusher
Advances sample vials into an analyser; the 206.1 N return stroke withdraws the rack, and the chrome-plated rod tolerates routine wipe-downs.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X45-40S the Right Cylinder?
Weigh it against the 20 mm bore (157 N at 0.5 MPa) and the 32 mm bore (402.2 N) - the 25 mm size earns its place when mid-range force and a short envelope must share space. Remember the adjuster sets the extend end only; on air failure the load can push the rod along, so support any held weight separately. FA flange, LB foot and I or Y knuckles cover most fixture needs, and the standard magnet means a CMSG or DMSG switch can be added whenever position feedback is wanted.
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 MAJ25X45-40S FAQ
Push is 245.3 N and pull 206.1 N at 0.5 MPa; at 0.7 MPa push rises to 343.4 N and pull to 288.5 N; theoretical peak is 50 kgf at 1.0 MPa. The -40 in the model code is the adjustable-stroke window: an external stop screw sets the extend end anywhere within it, up to the full 45 mm stroke.
No. Every MAJ piston carries its magnet as standard, so CMSG, DMSG or EMSG switches mount on the stainless barrel at any time for end-of-stroke or position checks - no retrofit and no extra-cost piston required.
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.
Request a Quote for Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X45-40S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.