Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X350-40S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X350-40S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø25mm bore and 350mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ25 mm
- Stroke350 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 MAJ25X350-40S
The MAJ25X350-40S pairs a 350 mm travel with a 40 mm adjustable window, so an external stop screw sets the extend stroke anywhere between 310 and 350 mm without shims or new hardware. Air drives the piston both ways; at 0.5 MPa the bore 25 piston pushes 245.3 N and pulls 206.1 N.
Built from a riveted stainless-steel barrel with a 20 um hard-chrome plated rod, this round-body mini shrugs off washdown mist that pits painted minis in damp or food-line spots. Because the magnet comes standard, CMSG or DMSG reed switches clip on straight from stock - no special-order piston. Working the numbers: plan on roughly 147 N of real pushing effort at 0.5 MPa (about 60% of the rating) instead of the full 245 N.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X350-40S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X350-40S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 350 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 MAJ25X350-40S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×350 | 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 MAJ25X350-40S Is Used
Carton reject gate
Kicks mislabeled boxes off a food-line conveyor; the stainless barrel and chromed rod cope with daily rinse-down without corroding.
Case erecting fixture
The 310-350 mm on-site trim squares a flap fold to the case depth without recutting the machine frame between formats.
Light marking press
Drives a stamping or dot-peen head at 0.7 MPa where 343.4 N of push is ample; the stop screw sets exact contact height per part.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X350-40S the Right Cylinder?
At 245.3 N push (0.5 MPa) the 25 mm bore sits mid-range: choose a 20 mm bore (157 N) for lighter pick-and-place or step up to 32 mm (402.2 N) for clamping fixtures. The stop screw is a mechanical end stop, not a mid-stroke lock - on air loss the rod still drifts, so add a check valve or external support where held loads matter. Mount it FA flange or LB foot, or add I / Y rod knuckles for linkages. Over 350 mm of travel, keep side load off the rod and guide the part externally. Note: 350 mm is beyond the 300 mm standard catalog stroke for bore 25, so this is a made-to-order build.
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 MAJ25X350-40S FAQ
At 0.5 MPa the 25 mm bore delivers 245.3 N push and 206.1 N pull; at 0.7 MPa push rises to 343.4 N. The theoretical maximum is 50 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi), rod speed 30-800 mm/s, and porting is 1/8 in.
No. Every MA-series cylinder ships with a built-in magnet, so CMSG, DMSG and EMSG switches mount on the stainless barrel without ordering a special piston. The extend stroke itself is trimmed 40 mm by an external stop screw, with fixed anti-impact bumpers softening each stroke end.
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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