Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X300-30S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X300-30S 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 MAJ40X300-30S
Pushing 628.3 N at 0.5 MPa and 879.6 N at 0.7 MPa, this 40 mm bore double-acting cylinder gives machine builders real headroom, and its 30 mm adjustable extend window absorbs the fixture tolerances that would otherwise force a redesign. Air supply can sit anywhere in 0.15-1.0 MPa (22-145 psi), with stroke speeds from 30 to 800 mm/s.
Unlike thin-wall painted minis, the MA series rivets aluminium-alloy covers onto a stainless round barrel and finishes the 16 mm piston rod with 20 um of hard chrome, an assembly that tolerates damp, dusty or lightly washed environments. Every piston carries a magnet as standard, so CMSG / DMSG / EMSG switches mount without ordering options. In practice, size actuators around 377 N of working force at 0.5 MPa; the bore will also lift about 32 kg vertically with a 2:1 margin intact.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X300-30S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X300-30S |
|---|---|
| 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 MAJ40X300-30S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×300 | 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 MAJ40X300-30S Is Used
Pallet-stacker clamp pad
Trimming 30 mm lets the pad adapt to two pallet sizes on a warehouse stacker attachment, drawing on 879.6 N of push at 0.7 MPa to grip dense loads without re-fixturing.
Lab mixing station ram
The 64 kgf vertical thrust class (about 32 kg lifted at 2:1) presses lids onto 200 L drums in a chemical blending room, where the stainless barrel stands up to solvent vapor.
Sawmill log stopper
A hard-chrome 16 mm rod and riveted stainless barrel endure sawdust and humidity at a small mill, with the 30 mm window tuned so the stop clears each log specification.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X300-30S the Right Cylinder?
Compare against the smaller 32 mm MA bore first: at 0.5 MPa it manages only 402.2 N push / 345.6 N pull, so jobs above roughly 400 N belong here on the 40 mm bore, the largest the series reaches. With a 300 mm stroke, watch buckling and side loads - support the load in external guides rather than cantilevering it off the rod.
The -30 stop sets where extension ends; on sudden air loss the piston is free to move, so position holding must come from valving, not this screw. FA flange and LB foot mounts, plus I or Y rod knuckles, cover most frame layouts, and the standard magnet pairs with all three switch types.
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 MAJ40X300-30S FAQ
Expect 628.3 N push and 527.8 N pull at 0.5 MPa, scaling to 879.6 N push and 738.9 N pull at 0.7 MPa; theoretical peak output is 128.1 kgf at 1.0 MPa. The 40 mm bore is plumbed with 1/8" ports, the 16 mm rod is threaded M12x1.25, and rod speed covers 30-800 mm/s over a 0.15-1.0 MPa (22-145 psi) supply.
Choose FA flange or LB foot for the body, and add an I or Y rod knuckle where the load pivots. Because the magnet is built in rather than sold as an option, CMSG, DMSG and EMSG switches attach directly to the stainless barrel for position feedback. Note that the adjustable version carries no SDB and no back-cover code.
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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