Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X300-100S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X300-100S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø40mm 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.
- BoreØ40 mm
- Stroke300 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 MAJ40X300-100S
A long-travel double-acting actuator with a 100 mm extend-trim window, this bore-40 MAJ drives 300 mm of stroke and pushes 628.3 N at 0.5 MPa - force enough for pallet pushers, gates and clamps that run far from the valve manifold. The external stop screw lets you set the extend stroke anywhere inside the -100 window without swapping hardware.
Its stainless round barrel with a 20 um hard-chrome plated rod tolerates condensation and mild washdown better than painted mini cylinders, and the fixed bumper pads soften stroke-end impact on every cycle. In practice, size the job to about 377 N of usable push at 0.5 MPa, or treat the rod as lifting roughly 32 kg vertically with a 2:1 margin.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X300-100S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X300-100S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 300 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 MAJ40X300-100S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×300 | 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 MAJ40X300-100S Is Used
Pallet pusher on a packaging transfer line
300 mm of travel clears a full pallet lane, and the 100 mm trim window lets one cylinder serve stations of different depths at 628.3 N push.
Bakery oven gate actuator
The stainless barrel and chrome rod cope with steam and flour-dust wipe-down; the end-stop trim sets exact door travel without fabricated mechanical stops.
Punch-press scrap pusher
Around 377 N of practical working force slides chip bins and skeletons clear under a 300 mm stroke, with switch positions from the standard piston magnet.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X300-100S the Right Cylinder?
At 402.2 N at 0.5 MPa the bore-32 MAJ handles lighter gates; when 628.3 N is still not enough you have reached the top of the MA bore range and should move to a larger series. The -100 trim shortens the extend stroke only, and it is a mechanical end stop - on air loss the rod still drifts, so it must never be trusted as a load-holding brake.
Pick FA flange or LB foot mounting, add I or Y rod knuckles where the tooling needs float, and note the 16 mm rod on a 300 mm stroke: keep side load low or guide the load externally. Ports are 1/8" and the male rod thread is M12x1.25. The magnet is built in as standard, so CMSG / DMSG / EMSG switches mount straight on, and the unit runs 0.15-1.0 MPa (22-145 psi) at 30-800 mm/s.
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 MAJ40X300-100S FAQ
At 0.5 MPa it pushes 628.3 N and pulls 527.8 N; at 0.7 MPa the figures rise to 879.6 N and 738.9 N. Theoretical maximum at 1.0 MPa is 128.1 kgf. It runs on 0.15-1.0 MPa (22-145 psi) of 40 um filtered air at 30-800 mm/s, with a 100 mm adjustable extend window.
Yes. Every MA-series cylinder ships with a magnet built into the piston, so CMSG, DMSG or EMSG switches clip onto the stainless barrel without a special-order piston or a paid magnet option.
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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.
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Most inquiries answered within 7-8 hours.
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