Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X80-75S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X80-75S 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 MAJ40X80-75S
Wide flexibility defines the MAJ40X80-75S: within its 75 mm adjustable window the extend stroke can be re-set anywhere between about 5 mm and the full 80 mm, so a single cylinder covers a family of part heights. The 40 mm bore supplies 628.3 N at 0.5 MPa, the strongest push in the MAJ range.
Build quality shows in the details: the stainless barrel resists corrosion in wet or outdoor spots, the 16 mm rod is hard-chrome plated for wear life, and riveted covers keep the body tight and compact. Each end carries a fixed bumper pad to soften impact, and the magnet comes as standard for CMSG / DMSG / EMSG sensing. For lift jobs, halving the 64 kgf theoretical vertical figure leaves roughly 32 kg as a comfortable load.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X80-75S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X80-75S |
|---|---|
| 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 MAJ40X80-75S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×80 | Stroke length in mm. |
| -75 | 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 MAJ40X80-75S Is Used
Bench test rig
Applies repeatable load to sample parts in a lab fatigue rig, where about 377 N usable at 0.5 MPa fits most proof checks.
Guard gate lift
Raises a 30 kg access gate on a small machine line, staying well inside the roughly 32 kg vertical figure with margin.
Sorting chute gate
Diverts cartons between two chutes in a sorting hub, the wide 75 mm window matching gates of different travel.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X80-75S the Right Cylinder?
Downsizing check: the 32 mm bore delivers 402.2 N at 0.5 MPa - if that covers your load, it is a cheaper buy; nothing in the MAJ line out-pushes this 40 mm bore. Remember the adjustable stop is an end-of-stroke setting, not a mid-travel lock; an unpressurized piston still drifts, so add a valve or external stop where holding matters. FA flange and LB foot mounts, plus I and Y rod knuckles, cover the mounting needs, and ports are 1/8" on this bore. For strokes far beyond 80 mm, watch side loading on the 16 mm rod.
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 MAJ40X80-75S FAQ
At the standard 0.5 MPa it pushes 628.3 N and pulls 527.8 N; at 0.7 MPa those become 879.6 N and 738.9 N, with 128.1 kgf the theoretical peak at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi), speed 30-800 mm/s, and the ports are 1/8" for the 40 mm bore.
An external stop screw trims the extend stroke anywhere within the 75 mm window of the ordered 80 mm stroke. It acts as a mechanical end stop only - it does not lengthen the stroke, and it will not hold the piston against drift if air is lost.
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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