Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X250-20S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X250-20S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø25mm bore and 250mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ25 mm
- Stroke250 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 MAJ25X250-20S
A 250 mm reach with a fine 20 mm trim is the brief this MAJ25X250-20S answers: a double-acting, round-body mini cylinder whose extend stroke can be wound down to 230 mm by an external stop screw. Bore 25 pushes 245.3 N and pulls 206.1 N at 0.5 MPa (72 psi), firm enough to gate, eject and index small assemblies at 30 to 800 mm/s.
The riveted stainless barrel and hard-chrome 10 mm rod cope with washdown spray and outdoor dust that corrode painted minis. When sizing, plan on about 147 N of real work at 0.5 MPa rather than the full 245.3 N rating. The magnet is built into the piston as standard, so CMSG / DMSG / EMSG switches mount without any special-order parts.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X250-20S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X250-20S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 250 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 MAJ25X250-20S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×250 | 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 MAJ25X250-20S Is Used
Bottling line gate
A divert gate on a bottling conveyor: 245.3 N at 0.5 MPa swings or pops single bottles off the lane, and the 20 mm screw trim sets the exact open position between 230 and 250 mm.
Press ejection
Push formed brackets clear of a small stamping die - the 250 mm reach clears the tooling while the stop screw gives repeatable ejection travel shot after shot.
Infeed interlock
A CMSG reed switch on the standard piston magnet confirms gate-open at a packaging infeed, letting the PLC release product only when the cylinder is fully back.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X250-20S the Right Cylinder?
Bracket the choice first: MAJ20 gives 157.0 N of push at 0.5 MPa if your load is lighter, while MAJ32 lifts the figure to 402.2 N for firmer work. Air runs at 0.15-1.0 MPa (22-145 psi), filtered to 40 um, with 1/8" ports and an M10x1.25 rod thread at this bore. The 20 mm window trims extend travel only - it is a mechanical end stop, not a mid-stroke lock, so on air loss the rod still drifts and an external stop is needed to hold position. Mount by FA flange or LB foot and add I or Y rod knuckles; on a 250 mm stroke, guide off-axis loads externally so side force stays off the 10 mm rod.
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 MAJ25X250-20S FAQ
Push is 245.3 N and pull 206.1 N at 0.5 MPa (72 psi); at 0.7 MPa (101 psi) push reaches 343.4 N with 288.5 N of pull. Theoretical maximum is 50 kgf at 1.0 MPa. This bore 25 unit has a 10 mm rod with M10x1.25 male thread, 1/8" ports, 0.15-1.0 MPa (22-145 psi) operating range, 1.5 MPa (215 psi) proof pressure, 30-800 mm/s speed and -20 to +70 C service.
No. The external stop screw only shortens the extend stroke, anywhere inside the 20 mm window of this model (230 to 250 mm), and acts purely as a mechanical end stop. If pressure drops, the piston keeps moving, so use a separate mechanical stop or valve logic where holding matters. Fixed bumper pads soften the impact at 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.
Request a Quote for Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X250-20S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.