Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X400-100S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X400-100S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø25mm bore and 400mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ25 mm
- Stroke400 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 MAJ25X400-100S
A wide 100 mm trim window makes this the most flexible of the MAJ25X400 versions: the double-acting stainless mini cylinder pushes 245.3 N at 0.5 MPa, and the external stop screw lets you shorten the extend stroke anywhere inside that band without ordering a new part. Fixed anti-impact bumper pads soften arrival at both ends of travel, and the magnet built into the piston is standard, so CMSG, DMSG or EMSG switches snap on for end-position sensing.
The 400 mm stroke sits past the 300 mm standard limit for a 25 mm bore, so it is produced to order on the same riveted round-body build: a stainless barrel rolled onto aluminium covers with a hard-chrome plated 10 mm rod. At full 0.7 MPa supply the push rises to 343.4 N, and the theoretical ceiling is 50 kgf at 1.0 MPa.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X400-100S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X400-100S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 400 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 MAJ25X400-100S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×400 | Stroke length in mm. |
| -100 | 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 MAJ25X400-100S Is Used
Multi-size carton check station
One stop screw setting covers carton heights from 300 to 400 mm on a snack-food packing line; the 100 mm window absorbs the full spread.
Pick-and-place verification
CMSG switches on the standard magnet confirm part seating before a gripper releases a 12 kg casting onto a pallet.
Lab press prototype rigs
Test benches trim clamp travel over 100 mm as fixtures change, using the 245.3 N push at 0.5 MPa for repeatable light clamping.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X400-100S the Right Cylinder?
Size it against neighbours: a MAJ20 gives 157 N push at 0.5 MPa, while a MAJ32 reaches 402.2 N - step up only if your jig weight demands it. With a 400 mm stroke the 10 mm rod is exposed to side loads, so guide the load externally on rails or a guide shaft rather than letting the rod carry it. Plan real work around 147 N at 0.5 MPa, which leaves margin for a 12 kg vertical lift. FA flange or LB foot mounting plus I or Y rod knuckles cover most fixings, and the stop screw is a mechanical end stop - it sets position but will not hold a load if air is lost.
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 MAJ25X400-100S FAQ
Push is 245.3 N and pull 206.1 N at 0.5 MPa; at 0.7 MPa push rises to 343.4 N with pull of 288.5 N; theoretical maximum is 50 kgf at 1.0 MPa. The external stop screw shortens the extend stroke anywhere within the ordered 100 mm window - it cannot lengthen travel beyond 400 mm. The 400 mm stroke is a made-to-order length because the 25 mm bore standard tops out at 300 mm. Speed range is 30-800 mm/s at 0.15-1.0 MPa (22-145 psi).
No. Every MAJ cylinder carries a piston magnet as standard, so CMSG, DMSG and EMSG reed or Hall switches mount directly on the 25 mm stainless barrel and read end positions with no special piston.
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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.
Fast Reply
Most inquiries answered within 7-8 hours.
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