Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X80-30S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X80-30S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø40mm bore and 80mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ40 mm
- Stroke80 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 MAJ40X80-30S
The MAJ40X80-30S pairs a 40 mm bore with a 30 mm extend-stroke window: an external stop screw trims the working stroke anywhere from the full 80 mm down, so one cylinder covers several clamping heights on a fixture. It is double acting, meaning air drives both the out and return moves, and at 0.5 MPa it pushes with 628.3 N (about 64 kgf theoretical).
The stainless round barrel and hard-chrome plated 16 mm rod shrug off damp air and mild washdown where painted minis rust. A fixed bumper pad softens stroke-end impact without any cushion tuning, and the magnet built in as standard accepts CMSG, DMSG or EMSG switches. For sizing, count on roughly 377 N of usable push at 0.5 MPa rather than the full 628.3 N rating.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X80-30S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X80-30S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 80 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 MAJ40X80-30S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×80 | 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 MAJ40X80-30S Is Used
CNC fixture clamping
Clamps raw aluminium blanks against a machining jig; the 30 mm window lets one setting serve blanks of slightly different heights.
Carton lid press
Presses fold-over lids on a cartoning line; the 628.3 N push at 0.5 MPa seats flaps without crushing the board.
Robot hand-off verify
Pairs with a CMSG switch to confirm the gripper arm has reached the trimmed stroke before the robot releases the part.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X80-30S the Right Cylinder?
Next bore down is the 32 mm MAJ at 402 N push (0.5 MPa); this 40 mm size at 628.3 N is the top of the MAJ range, and the MACJ series adds adjustable cushions if impact control matters more. The adjuster is a mechanical end stop for the extend stroke only - on air loss the piston can still drift, so do not rely on it to hold a load mid-stroke. Mount with the FA flange or LB foot, add I or Y rod knuckles where the load must pivot, and check side load if your machine runs strokes well past this 80 mm.
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 MAJ40X80-30S FAQ
At 0.5 MPa it pushes 628.3 N and pulls 527.8 N; at 0.7 MPa push rises to 879.6 N. Theoretical maximum is 128.1 kgf at 1.0 MPa. Air supply runs 0.15-1.0 MPa (22-145 psi), speed 30-800 mm/s, and the 1/8" ports suit this 40 mm bore; the 16 mm rod carries an M12x1.25 male thread.
Its round body is a stainless-steel barrel rolled together with aluminium covers, so there are no tie rods to loosen, and the hard-chromed rod resists wear and rust in damp shops where painted minis corrode.
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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