Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X40-30S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X40-30S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø25mm bore and 40mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ25 mm
- Stroke40 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 MAJ25X40-30S
Want a 40 mm stroke that finishes exactly where the fixture needs it? The MAJ25X40-30S adds a 30 mm adjustment window, so the external stop screw sets the extend position anywhere from 10 to 40 mm without ordering a custom length. It is a double-acting mini cylinder on a stainless round barrel, rated 245.3 N push at 0.5 MPa (206.1 N pull) and 343.4 N push at 0.7 MPa.
Practical budgeting: count on about 147 N of usable push at 0.5 MPa, roughly the force to slide a 15 kg loaded tray on low-friction guides. The riveted aluminium covers and rolled stainless tube form a sealed, slim body that slips into tight machine frames, and the standard piston magnet pairs with CMSG, DMSG or EMSG switches for position feedback.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X40-30S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X40-30S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 40 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 MAJ25X40-30S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×40 | Stroke length in mm. |
| -30 | 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 MAJ25X40-30S Is Used
Bushing press on an assembly bench
Presses bronze bushings into pump housings at a manual station, where the operator trims the stroke to each housing depth.
Cookie-tray lane divider
Swings to divert trays between two lanes on a bakery conveyor, with position signalled back through an EMSG switch.
Sterilizer cart lid latch
Latches lids on washable sterilizer carts; the stainless barrel stands up to hot, humid cycles far better than painted minis.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X40-30S the Right Cylinder?
Against its neighbours, bore 25 sits between the 157 N push of a bore 20 MA and the 402 N of a bore 32 MAJ at 0.5 MPa - right for mid-weight clamps, kickers and small presses. The 30 mm window plus a 10 mm rod with an M10x1.25 thread and 1/8" ports makes integration straightforward. If your load must hold position through a power loss, the stop screw will not do it; it limits extend travel only, and the piston drifts when air drops. Choose FA flange or LB foot mounting and add a separate holding valve.
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 MAJ25X40-30S FAQ
Push at 0.5 MPa is 245.3 N with 206.1 N pull; at 0.7 MPa push reaches 343.4 N, and the theoretical ceiling is 50.0 kgf at 1.0 MPa. The bore is 25 mm, ports are 1/8", the rod thread is M10x1.25, and the extend stroke trims across a 30 mm window from the ordered 40 mm.
The high-precision stainless barrel plus a 20 um hard-chrome plated carbon-steel rod resist mild corrosion and washdown far better than painted-steel minis, which is why the MAJ holds up in damp food, agricultural and outdoor installations. Aluminium-alloy covers complete the sealed, riveted body.
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 MAJ25X40-30S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.