Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X225-20S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X225-20S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø40mm bore and 225mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ40 mm
- Stroke225 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke
- Rod threadM12×1.25
- 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 MAJ40X225-20S
Sixty-four kilograms: that is what the 40 mm bore of this AirTAC MAJ40X225-20S can lift vertically at 0.5 MPa (628 N of push). It is a double-acting round-body mini cylinder with an adjustable extend stroke - the external stop screw sets the extend position anywhere within the ordered 20 mm window, shortening the stroke but never adding to it.
Unlike painted-steel minis, the stainless tube riveted to aluminium-alloy covers shrugs off humid, food-wash or outdoor air, and the 16 mm carbon-steel rod carries 20 um of hard chrome. Halve that lift for a 2:1 margin and you still raise about 32 kg of real payload per cycle. Fixed anti-impact pads soften both ends of travel, and the standard magnet accepts CMSG / DMSG / EMSG switches straight from stock.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X225-20S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X225-20S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 225 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | 1/8" |
| Rod thread | M12×1.25 |
| 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 500 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | 739 N |
| Max (@1.0 MPa) | 128 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 MAJ40X225-20S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×225 | 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 MAJ40X225-20S Is Used
Chair frame dowel press
Presses hardwood dowels into CNC-drilled chair stretchers on a furniture assembly bench, with the 20 mm trim window absorbing tooling height changes between seat models.
Paint tin label press-on
Holds a self-adhesive label against 1 L paint tins for a fixed dwell as they roll beneath, using light contact force backed by 628 N of reserve.
Frozen pizza carton close
Pushes tuck flaps shut on frozen pizza cartons at a food plant end-of-line station, where washdown spray hits the stainless barrel every shift.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X225-20S the Right Cylinder?
Drop to a 32 mm MA (402.2 N push at 0.5 MPa) if your load is lighter; the MA range tops out at this 40 mm bore, so anything heavier calls for a larger family or twin cylinders. Pull force is 527.8 N at 0.5 MPa, enough to retract a sprung fixture. Because the stop screw is an end stop rather than a mid-stroke lock, a de-energized cylinder can still be back-driven - do not count on it to hold a load in place. On a 225 mm stroke, minimize side load on the rod or add external guides for offset masses. Bolt it down with an FA flange or LB foot, add I or Y knuckles if the pull axis needs alignment, and note the magnet is standard so CMSG / DMSG / EMSG switches click on without a special-order piston.
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 MAJ40X225-20S FAQ
Push 628.3 N and pull 527.8 N at 0.5 MPa; push 879.6 N and pull 738.9 N at 0.7 MPa; theoretical peak 128.1 kgf at 1.0 MPa. Air supply 0.15-1.0 MPa (22-145 psi), proof 1.5 MPa (215 psi), speed range 30-800 mm/s, air filtered to 40 um. Port size is 1/8" on this 40 mm bore.
The high-precision stainless barrel with riveted aluminium covers does not rely on paint or anodizing for corrosion protection, and the hard-chrome rod resists moisture and mild chemicals, so the MAJ40X225-20S survives damp food, beverage and outdoor duty that swells painted minis. The magnet comes standard, so CMSG / DMSG / EMSG sensors need no special order.
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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