Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X250-75S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X250-75S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø40mm bore and 250mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ40 mm
- Stroke250 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 MAJ40X250-75S
The widest trim window in this series, 75 mm, makes the MAJ40X250-75S a natural fit where the exact extend position will only be known after machine trials. It is a double-acting 40 mm mini cylinder on a rolled stainless-steel barrel, pushing 628.3 N at 0.5 MPa and returning 527.8 N on the same air.
Design to roughly 377 N of usable push at 0.5 MPa, which corresponds to raising a 32 kg load vertically with a 2:1 cushion. Hard-chrome plating 20 um thick on the carbon-steel rod, together with the stainless tube, gives the pair genuine resilience around coolant mist and outdoor splash.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X250-75S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X250-75S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 250 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 MAJ40X250-75S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×250 | 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 MAJ40X250-75S Is Used
Fixture variant switcher
One cylinder serves three weld-cell fixture builds: the 75 mm stop-screw range re-zones the 250 mm extend stroke between changeovers in minutes.
Depth-setting test rig
Takes a test platen through 250 mm of travel; engineers trim the stroke up to 75 mm shorter to profile compression curves on new seals.
Case taping hold-down
Presses empty cartons square during taping; 628 N at 0.5 MPa is ample, and the standard magnet feeds a CMSG signal to the taper's PLC.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ40X250-75S the Right Cylinder?
Below about 400 N of load, a 32 mm MAJ (402.2 N at 0.5 MPa) is the leaner pick; above that, this 40 mm bore's 628.3 N is the ceiling of the MA mini line, so larger duties need a different AirTAC series. The 75 mm window covers the widest tuning spread, at the cost of a slightly longer retracted body than fixed-stroke MAs.
Support the 250 mm stroke with external guides to protect the rod from bending, pick FA flange or LB foot mounting, and wire a CMSG or DMSG switch onto the standard magnet for end-position feedback. The stop screw trims the extend stroke only - it does not lengthen travel and will not pin the piston when air is lost.
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 MAJ40X250-75S FAQ
At 0.5 MPa: 628.3 N push, 527.8 N pull. At 0.7 MPa: 879.6 N push. Theoretical maximum: 128.1 kgf at 1.0 MPa. Air supply 0.15-1.0 MPa (22-145 psi), rod speed 30-800 mm/s, port 1/8", rod thread M12x1.25.
FA flange and LB foot brackets bolt on directly, I and Y rod knuckles suit pivoting links, and the built-in magnet accepts CMSG, DMSG and EMSG switches on the stainless barrel with no special-order piston.
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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