Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X400-30S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X400-30S 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 MAJ25X400-30S
Product families that change height every shift suit the MAJ25X400-30S: turn the external stop screw and the double-acting extend stroke moves anywhere within its 30 mm window, delivering 245.3 N at 0.5 MPa at whatever position you choose. The build is the riveted round-body mini format - stainless barrel, aluminium-alloy covers, hard-chrome plated 10 mm piston rod - with fixed bumper pads easing both stroke ends.
The 400 mm travel exceeds the 300 mm standard maximum of the 25 mm bore, so production is to order; nothing else is special, since the piston magnet ships standard for CMSG, DMSG or EMSG switch fitment. Feed it air filtered to 40 um at 0.15-1.0 MPa (22-145 psi) and expect 30-800 mm/s; at 0.7 MPa push reaches 343.4 N.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X400-30S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X400-30S |
|---|---|
| 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 MAJ25X400-30S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×400 | 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 MAJ25X400-30S Is Used
Layer-stacker height select
A bakery line stacks trays at three heights; one 30 mm window setting per product keeps changeover to a screw turn.
Valve-body eject station
Machining cells eject cast valve bodies using the 50 kgf-class push reserve, stop position set per fixture.
Fill-level probe dive
A dairy bottling line lowers a probe into bottles; DMSG switches on the standard magnet log the check result.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X400-30S the Right Cylinder?
Check the force ladder first: MAJ20 manages 157 N push at 0.5 MPa, MAJ32 manages 402.2 N, and this 25 mm bore's 245.3 N covers the middle ground. Keep applied work near 147 N at 0.5 MPa, which comfortably raises around 12 kg on a vertical axis with a 2:1 reserve. Long 400 mm strokes amplify rod side loading, so slide the load on external guideways. The trim screw defines the extend end stop only - under air loss the piston is free to drift, so it never substitutes for a holding valve. Fix by FA flange or LB foot and pick I or Y knuckles for pivoting links.
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 MAJ25X400-30S FAQ
Push 245.3 N, pull 206.1 N at 0.5 MPa; push 343.4 N, pull 288.5 N at 0.7 MPa; theoretical maximum 50 kgf at 1.0 MPa. The extend stroke is trimmed by up to 30 mm with an external stop screw and cannot exceed the ordered 400 mm, itself a made-to-order length over the 25 mm bore's 300 mm standard. Port size is 1/8" and speed range 30-800 mm/s.
No - the stop screw is a mechanical end stop that shortens the extend stroke within the 30 mm window; it is not a mid-stroke lock or brake, so on pressure loss the piston drifts. For positive holding, add an external blocking valve, and pair the standard magnet with CMSG, DMSG or EMSG switches to verify position instead.
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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