Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X300-10S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X300-10S 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 MAJ40X300-10S
A double-acting MAJ with a 10 mm adjustable extend window, this 40 mm bore cylinder turns 0.15-1.0 MPa (22-145 psi) shop air into 628.3 N of push and 527.8 N of pull at 0.5 MPa - enough headroom for clamping, pressing and lift jobs other minis shy away from. The external stop screw lets you shorten the extend stroke on site without swapping cylinders, and fixed anti-impact bumper pads soften both stroke ends.
Build quality is where the MA earns its keep: a stainless round barrel riveted to aluminium-alloy covers shrugs off mild corrosion and washdown, while the hard-chrome plated 16 mm rod (20 um) keeps sliding wear low. At 0.5 MPa plan for roughly 377 N of genuine work force rather than the full rating, and the bore lifts about 32 kg vertically even with a 2:1 margin in hand.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X300-10S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X300-10S |
|---|---|
| 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 MAJ40X300-10S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×300 | Stroke length in mm. |
| -10 | 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 MAJ40X300-10S Is Used
Bench-top crimp press
Trimming to within 10 mm of the ordered stroke lets one cylinder serve several die heights on a small aluminum terminal crimping fixture running 0.5-0.7 MPa.
Packaging gate actuator
Pushes a diverter gate on a snack-food conveyor, where the riveted stainless barrel tolerates daily wipe-downs and the magnet feeds a DMSG switch for gate-confirmed interlocks.
Lift-assist check station
The bore's 64 kgf theoretical vertical push means a 32 kg pallet locator block can be raised with a 2:1 margin, with the extend stroke trimmed 10 mm to seat the part squarely.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X300-10S the Right Cylinder?
Sizing check: the next smaller AirTAC MA bore, 32 mm, delivers 402.2 N push / 345.6 N pull at 0.5 MPa, so stay at 40 mm when your tooling needs more than 400 N; the 40 mm bore is the largest MA offers, and 300 mm sits well inside its 500 mm maximum standard stroke. Because this adjuster acts as a mechanical end stop only, it will not lock the piston against drifting if air pressure is lost - add a separate valve solution where holding matters.
Pair the magnet-equipped piston with CMSG / DMSG / EMSG switches for end-position feedback, then choose FA flange or LB foot mounting plus an I or Y rod knuckle. On a 300 mm stroke, guide the load externally and keep side loads off the 16 mm rod to avoid premature seal wear.
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 MAJ40X300-10S FAQ
At 0.5 MPa it pushes 628.3 N and pulls 527.8 N; at 0.7 MPa those rise to 879.6 N and 738.9 N. The theoretical maximum is 128.1 kgf at 1.0 MPa. Ports are 1/8" on the 40 mm bore, the rod thread is M12x1.25, and speeds run 30-800 mm/s across a 0.15-1.0 MPa (22-145 psi) supply.
The high-precision stainless tube is riveted to aluminium-alloy covers with a stainless block, so no paint can chip or rust through in washdown or outdoor service. The 20 um hard-chrome rod resists corrosion and scoring, and the two-way piston seal retains grease for long, smooth running.
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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