
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ32X75-40S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø32mm 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.
Built for machines that need one bore and many stroke positions, the 40 mm trim window spans most of this cylinder's 75 mm travel: set 35, 50 or 70 mm extension from the same unit. Push at 0.5 MPa is 402 N with 346 N retract; up at 0.7 MPa expect 563 N. Derating to 60 percent leaves about 241 N for the actual task, a figure worth matching against your linkage friction.
The riveted round body - stainless tube, aluminium covers, hard-chrome plated 12 mm rod - keeps corrosion out of coolant-misted cells without any paint to flake. Its bumpers are fixed pads that only soften end impact; adjustable cushioning belongs to the MACJ variant. FA flange and LB foot brackets plus I and Y knuckles cover the usual mounting patterns.
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ32X75-40S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø32 mm |
| Stroke | 75 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | 1/8" |
| Rod thread | M10×1.25 |
| 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.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | 484 N |
| Max (@1.0 MPa) | 82 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 32 | 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.
Feeding bar stock into a small CNC collet loader, the rod advances up to 75 mm with the stop set by trial once bar lengths change.
A materials-handling workshop uses the cylinder to latch a forklift side-shift attachment; the stainless body survives yard rain exposure.
A small pneumatic arbor press forms thin aluminium shims on a workbench, staying within about 240 N after derating the 402 N extend rating.
Between the 25 mm bore (245 N push at 0.5 MPa) and the 40 mm bore (628 N), this sits squarely in medium-duty territory. The 75 mm stroke stays inside the 500 mm standard limit for this bore. Note the stop screw is an extend-side end stop only - it will not lock the rod against drift if air is lost. Magnet comes standard; order FA or LB mounting to suit the frame.
Quick checklist
At 0.5 MPa the extend stroke produces 402 N and retract 346 N; at 0.7 MPa, 563 N and 484 N. Maximum theoretical force at 1.0 MPa is 82 kgf. Supply 0.15-1.0 MPa (22-145 psi) of 40 um filtered air - proof pressure is 1.5 MPa (215 psi) - with travel speed 30-800 mm/s.
The stainless-steel barrel and hard-chrome plated carbon-steel rod handle humid, rinsed or outdoor locations far better than painted mini cylinders. Note the bumper pads are fixed - they decelerate the piston but cannot be tuned like an air cushion, so for adjustable cushioning look at the MACJ family instead.
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