Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X75-40S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X75-40S 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 MAJ40X75-40S
With the widest window in this family, the MAJ40X75-40S lets maintenance teams pull the extend stroke back anywhere between 35 and 75 mm using nothing more than the external stop screw. Power comes from the largest MA bore: 628.3 N forward and 527.8 N back at 0.5 MPa, which translates to roughly 377 N of dependable working push at the usual 60 percent sizing margin.
The stainless round barrel is rolled and riveted to its aluminium covers, a compact body that fits cramped machine frames and tolerates humid or outdoor air far better than painted-steel minis. Related options if this one is close: MA for a fixed stroke, MACJ when an adjustable cushion is also needed, MAD for through-rod duty.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X75-40S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X75-40S |
|---|---|
| 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 MAJ40X75-40S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×75 | Stroke length in mm. |
| -40 | 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 MAJ40X75-40S Is Used
Retrofit die seat
Retrofitting older transfer machines, engineers use the 40 mm window to match legacy fixture positions without drilling new holes, trusting 628.3 N at 0.5 MPa to seat dies.
Outdoor gate actuator
Sliding machine covers and small gates in outdoor enclosures suit the corrosion-resistant stainless body, with the stop screw trimming travel to the actual opening width.
Bin compactor head
A light compacting head on packaging waste gets about 377 N of real working force, enough for bin-sized densifying tasks at cycle speeds up to 800 mm/s.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X75-40S the Right Cylinder?
Downsizing to the 32 mm bore costs force - 402.2 N at 0.5 MPa - so choose it only below about 240 N of working load. On vertical lifts the 628.3 N push equates to about 64 kg, or 32 kg with a 2:1 margin; the stop screw is an end stop, not a brake, so an unsupported load will still sag on air loss. Fix with FA flange or LB foot, act the rod through an I or Y knuckle, and take end signals from CMSG or DMSG switches onto the standard magnet.
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 MAJ40X75-40S FAQ
At 0.5 MPa: 628.3 N push, 527.8 N pull. At 0.7 MPa: 879.6 N push, 738.9 N pull. Theoretical maximum 128.1 kgf at 1.0 MPa. The cylinder is double-acting with the extend stroke adjustable down to 35 mm from 75 mm via the -40 window, running on 0.15-1.0 MPa (22-145 psi) filtered air at 30-800 mm/s with 1/8" ports.
The stop screw sets a mechanical limit at the extend end only; it shortens travel, never extends it past the ordered 75 mm, and it is not a load-holding brake. With pressure removed the rod can still be driven back by the load, so vertical or heavy duties need an external lock or counterbalance. The fixed bumper pads at each end simply soften the landing.
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.
Request a Quote for Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X75-40S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.