Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X75-30S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X75-30S 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 MAJ40X75-30S
Adjustability is the whole point of the MAJ40X75-30S: a 75 mm extend stroke that can be reset anywhere down to 55 mm by turning the external stop screw, no cylinder swap needed when the process changes. The 40 mm bore is the strongest in AirTAC's MA mini family, with 628.3 N push and 527.8 N pull at 0.5 MPa; a sensible design figure is about 377 N of that push at 0.5 MPa so the unit is never worked flat out.
The body is a compact riveted round package: stainless barrel, aluminium covers and a hard-chrome carbon-steel rod that shrugs off the damp shop air which peels paint off cheaper minis. If you later need adjustable cushioning as well as an adjustable stroke, AirTAC's MACJ is the related series to quote; MA is the fixed-stroke twin and MAD the double-rod version. A standard-built magnet lets EMSG switches track position out of the box.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X75-30S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X75-30S |
|---|---|
| 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 MAJ40X75-30S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×75 | 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 MAJ40X75-30S Is Used
Bench press depth stop
A small bench press doing riveting and punching on the same frame can set a different depth per tool, trimming the 75 mm stroke within 30 mm as tooling changes.
Lab compaction fixture
Sample compaction rigs in materials labs benefit from 628.3 N at 0.5 MPa plus repeatably resettable stop positions between test protocols.
Lane diverter paddle
On a bottling conveyor, a diverter paddle needs part of full travel for one SKU and more for another; the stop screw adapts stroke while an EMSG switch confirms the trimmed end.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X75-30S the Right Cylinder?
The 30 mm window covers fixture families whose grip point shifts between batches; remember the screw only shortens extension and acts as a hard stop, so it neither lengthens the stroke nor locks the rod against drift when air fails. For a lighter job the 32 mm bore at 402.2 N push (0.5 MPa) may do, but the 40 mm is the top of the line and cannot be upsized within MA. FA flange, LB foot, and a standard magnet with CMSG switch compatibility round out the spec.
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 MAJ40X75-30S FAQ
Push 628.3 N and pull 527.8 N at 0.5 MPa; push 879.6 N at 0.7 MPa; theoretical max 128.1 kgf at 1.0 MPa. Double-acting, extend stroke adjustable over a 30 mm window from 75 mm, air supply 0.15-1.0 MPa (22-145 psi), speed 30-800 mm/s, 1/8" ports, 16 mm hard-chrome rod, bumper pads fixed at both stroke ends.
Yes - every MA-series piston carries a magnet as standard equipment, so CMSG, DMSG or EMSG switches mount directly on the barrel with no special-order piston or surcharge. Just place the switch within the travel actually used after adjustment, since the extend stroke can be trimmed anywhere in the 30 mm window.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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