Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X45-20S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X45-20S 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 MAJ25X45-20S
A compact double-acting mini cylinder whose extend stroke you set on the machine: an external stop screw trims the extend position anywhere inside the ordered 20 mm window while retract stays full. The round stainless barrel is riveted to aluminium-alloy covers, the 10 mm rod is hard-chrome plated carbon steel, and a magnet is built in as standard so CMSG, DMSG or EMSG switches mount without a special piston.
At 0.5 MPa the 25 mm bore delivers 245.3 N forward and 206.1 N back (343.4 N forward at 0.7 MPa, 50 kgf theoretical maximum). Fixed bumper pads soften the stroke ends, speed spans 30-800 mm/s, and pressure runs 0.15-1.0 MPa (22-145 psi). For day-to-day sizing plan on roughly 147 N of real working force at 0.5 MPa - enough for light clamping and small-part transfer in cramped fixtures.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X45-20S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X45-20S |
|---|---|
| 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 MAJ25X45-20S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×45 | 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 MAJ25X45-20S Is Used
Bearing press fixture
On a bench press for small bushings, the usable 147 N at 0.5 MPa seats light interference fits in aluminium housings, while the 20 mm window lets one fixture serve two part depths.
Chute gate kicker
A 45 mm kick diverts small cartons at a sortation chute; 245.3 N push overcomes gate friction and the stainless barrel survives damp warehouse air.
Carton tab folder
Folds glue tabs on e-commerce cartons at up to 800 mm/s, with the standard magnet driving a CMSG switch to confirm each fold cycle.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X45-20S the Right Cylinder?
Size both ways before you commit: the 20 mm bore pushes 157 N at 0.5 MPa and the 32 mm bore 402.2 N, so this 25 mm unit fits when the load sits between those classes. The trim screw is a mechanical end stop - if air is lost the rod can still be moved, so it will not hold a position mid-stroke. Mount via FA flange or LB foot with I or Y rod knuckles to suit the fixture, and keep side loads off the 10 mm rod even at this short 45 mm stroke.
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 MAJ25X45-20S FAQ
At 0.5 MPa the 25 mm bore 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 maximum of 50 kgf at 1.0 MPa. The extend stroke is trimmed on site by an external stop screw anywhere inside the ordered 20 mm window, while the retract stroke stays full at 45 mm.
The round barrel is stainless steel with a hard-chrome plated 10 mm rod, so it copes with damp and washdown-prone corners far better than painted minis. The stroke-end pads are fixed anti-impact bumpers that soften impact only - they are not adjustable air cushions, which is the MACJ family's job. Port size is 1/8 inch.
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 MAJ25X45-20S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.