Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X145-40S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X145-40S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø25mm bore and 145mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ25 mm
- Stroke145 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 MAJ25X145-40S
Double-acting and built around a riveted stainless-steel round barrel, the MAJ25X145-40S gives you a 145 mm stroke whose extend position can be trimmed anywhere inside a 40 mm window with an external stop screw. At 0.5 MPa it develops 245.3 N on the push stroke and 206.1 N pulling back, rising to 343.4 N at 0.7 MPa. That 245.3 N figure is worth converting before you size the job: treat roughly 147 N as the realistic working force, or expect the rod to lift about 12 kg vertically once you keep a 2:1 margin.
The hard-chrome plated 10 mm carbon-steel rod slides in grease-retaining two-way seals, and a fixed anti-impact pad softens each stroke end - it decelerates, it is not an adjustable cushion. Because the magnet is built in as standard, CMSG, DMSG or EMSG switches clip on without any special-order piston. Pressure range is 0.15-1.0 MPa (22-145 psi) and speed spans 30-800 mm/s.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X145-40S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X145-40S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 145 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 MAJ25X145-40S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×145 | 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 MAJ25X145-40S Is Used
Packaging line gate
Swinging a 5 kg reject gate on a snack-food conveyor, with the 40 mm trim letting engineers dial the gate angle after installation.
Carton down-station
Pressing fold flaps on 300 mm cartons; the trimmed extend stroke avoids crushing when the flap height varies between SKUs.
Sample carousel index
Advancing a laboratory sample carousel one station per cycle; the 206.1 N return force retracts the indexer cleanly every time.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X145-40S the Right Cylinder?
At 145 mm of travel this is a mid-length actuator: if your load only needs about 157 N at 0.5 MPa, the bore 20 MAJ with an 8 mm rod will do; if you need over 400 N, step up to the bore 32 model (402.2 N at 0.5 MPa). Remember the adjuster is a mechanical end stop for extension, not a mid-stroke lock - with air lost the piston can still drift, so clamp the load separately.
Mount it with an FA flange or LB foot, add an I or Y rod knuckle if the tooling needs a swivel, and pick G or NPT ports if PT is not your plant standard.
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 MAJ25X145-40S FAQ
At 0.5 MPa it pushes 245.3 N and pulls 206.1 N; at 0.7 MPa those figures become 343.4 N push and 288.5 N pull. The theoretical maximum at 1.0 MPa is 50 kgf. Air supply must be filtered to 40 um and regulated between 0.15-1.0 MPa (22-145 psi).
No - the external screw is a mechanical end stop that shortens the extend stroke within the ordered 40 mm window; it is not a brake, so a suspended piston will still drift on air loss. For position retention, add a separate clamping or valving solution.
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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.
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Most inquiries answered within 7-8 hours.
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