Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X75-50S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X75-50S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø40mm bore and 75mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ40 mm
- Stroke75 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 MAJ40X75-50S
A double-acting 40 mm bore mini cylinder with a 75 mm stroke that an external stop screw trims by up to 50 mm on site. At 0.5 MPa it pushes 628 N (about 64 kgf), enough for press, clamp and lift work in compact machinery. Operating range is 0.15-1.0 MPa (22-145 psi) and speed 30-800 mm/s.
The stainless round barrel is riveted to aluminium covers with a hard-chrome plated 16 mm rod, so it shrugs off mild corrosion in damp or washdown corners where painted minis fail. The fixed anti-impact pad softens the stroke-end landing (it decelerates only, unlike the cushioned MACJ), and the magnet is built in as standard, so CMSG, DMSG or EMSG switches mount straight on. For real work, plan on roughly 377 N of usable push at 0.5 MPa instead of the full 628 N.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X75-50S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X75-50S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 75 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 MAJ40X75-50S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×75 | Stroke length in mm. |
| -50 | 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 MAJ40X75-50S Is Used
Capping heads on bottling lines
The 50 mm trim window lets one cylinder serve tall and short bottle formats; 628 N at 0.5 MPa seats caps without a second stop.
Product gating on packing conveyors
Foot mounted as LB, it pushes carton stacks off the belt between two positions flagged by the built-in magnet.
Fixture clamping at weld benches
The stainless barrel and chrome rod stand up to grinding dust and coolant mist that corrode painted minis.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X75-50S the Right Cylinder?
Need less force? The MAJ32 delivers 402 N push at 0.5 MPa; above this bore the series tops out at the MAJ40 with 628 N, so step sideways to MACJ if an adjustable cushion is needed rather than more force. On air loss the adjuster acts only as a mechanical end stop, never a mid-stroke lock, so the rod can still drift - do not count on it to hold a load. FA flange, LB foot and I or Y rod knuckles cover the mounting; ports are 1/8" and the male rod thread is M12x1.25.
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 MAJ40X75-50S FAQ
Push is 628.3 N at 0.5 MPa and 879.6 N at 0.7 MPa; pull is 527.8 N at 0.5 MPa and 738.9 N at 0.7 MPa. The theoretical maximum at 1.0 MPa is 128.1 kgf.
The riveted stainless barrel and 20 um hard-chrome plated 16 mm rod tolerate washdown and outdoor humidity better than painted bodies, and the fixed bumper pad quiets stroke-end impact without needing an adjustable cushion.
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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