Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X300-20S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X300-20S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø25mm bore and 300mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ25 mm
- Stroke300 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 MAJ25X300-20S
A double-acting round-body mini cylinder with a 300 mm stroke and a 20 mm adjustment window: an external stop screw on the MAJ25X300-20S shortens the extend travel on site, so one cylinder serves several nearby positions. Pushing with 245.3 N (about 25 kgf theoretical) at 0.5 MPa and 343.4 N at 0.7 MPa, it covers light clamping, ejecting and lifting in compact frames.
The stainless barrel and 20 um hard-chrome rod handle damp shops and rinse-down better than painted minis, and every MA cylinder ships with a built-in magnet, so CMSG, DMSG or EMSG switches drop straight on. Keep continuous duty near 147 N at 0.5 MPa - six tenths of the rating - and the drive will lift or seat parts of roughly 12 kg vertically with margin.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X300-20S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X300-20S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 300 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 MAJ25X300-20S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×300 | 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 MAJ25X300-20S Is Used
Carton kick-off on a case labeling line
With about 147 N of usable push at 0.5 MPa the rod flicks mislabeled cartons off the belt, and trimming 20 mm matches shallow discharge chutes.
Lid lift on a benchtop curing oven
A 12 kg door lifts vertically with margin from the 25 kg theoretical rating, and the built-in magnet feeds open and closed signals to the controller.
Stopper pin on a small rotary indexer
Extend the full 300 mm to index, or set the stop screw 20 mm short for a quicker-clearing pin; the fixed bumper pads quiet the seat.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X300-20S the Right Cylinder?
Step down to the bore 20 MAJ if your load needs under 157 N at 0.5 MPa, or up to bore 32 (402.2 N at 0.5 MPa) if 245.3 N is cutting it close. Remember the stop screw is a mechanical end stop, not a mid-stroke lock: with air lost the piston can still be pushed along, so clamp or brake the load separately. For the 300 mm stroke, guide any side load externally and keep the rod thrust axial; FA flange or LB foot mounting plus a CMSG switch on the standard magnet covers most pick-and-place frames.
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 MAJ25X300-20S FAQ
At 0.5 MPa it pushes 245.3 N and pulls 206.1 N; at 0.7 MPa the figures are 343.4 N push and 288.5 N pull. The theoretical maximum at 1.0 MPa is 50 kgf for this 25 mm bore, with a 10 mm rod, 1/8" ports and an M10x1.25 male rod thread.
An external stop screw trims the extend stroke by up to 20 mm below the full 300 mm; it is an end stop, so the rod can still drift if air is lost. The magnet comes standard, so CMSG, DMSG or EMSG switches mount without ordering a special piston.
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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