Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X225-75S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X225-75S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø40mm bore and 225mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service. A variable air cushion at both ends lets you tune end-of-stroke deceleration on site.
- BoreØ40 mm
- Stroke225 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM12×1.25
- CushionVariable air cushion, both ends
- 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 MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X225-75S
A 75 mm adjustment window makes the MACJ40X225-75S the flexible pick of the bore 40 adjustable range: run the full 225 mm extend stroke or dial it down to 150 mm without swapping cylinders. Double-acting throughout, with variable cushions at each end to tame end-of-stroke impact across 30-800 mm/s.
The stainless round barrel with rolled aluminium covers and a hard-chrome plated carbon-steel rod resists corrosion in humid or washdown areas. Push force at 0.5 MPa is 628.3 N; sizing at about 60 percent of that leaves a practical 377 N for real work, enough to raise roughly 32 kg vertically with a 2:1 margin. The magnet comes standard, so CMSG, DMSG and EMSG switches mount without ordering extras.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X225-75S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X225-75S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 225 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| 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 | Variable air cushion, both ends |
| 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 MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X225-75S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×225 | 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 MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X225-75S Is Used
Lab autosampler lift
Raising sample trays in automated lab equipment: about 32 kg of vertical capacity with reserve covers loaded tray stacks, and the 75 mm window tunes the lift height per method.
AGV deck latch
Automated guided vehicles use the adjustable stroke to lock charging decks at the exact height each station needs, with dual cushions softening every latch.
Ejector on a light stamping bench
Clearing formed brackets from a small die: 628 N at 0.5 MPa pushes parts free quickly, and the cushion prevents shock as the tooling retracts.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X225-75S the Right Cylinder?
For lighter duty the 32 mm bore gives 402 N at 0.5 MPa; for heavier work step up to 50 mm and 981 N. This 40 mm unit sits between them at 628 N, a good middle for ejection and transfer heads. The long 225 mm stroke calls for external guiding or an I or Y knuckle on the 16 mm rod to keep side loads low. Remember the stop screw sets the extend position only: under air loss the piston is free to move, so add a separate locking valve where a load must stay put. FA flange and LB foot mounts fit, and the standard magnet pairs with CMSG, DMSG or EMSG switches.
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 On first run, back off the cushion screws and release gradually.
- check Installation by qualified personnel per AirTAC docs.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X225-75S FAQ
Push at 0.5 MPa is 628.3 N and pull is 527.8 N; raise pressure to 0.7 MPa and you get 879.6 N push and 738.9 N pull; the theoretical ceiling at 1.0 MPa is 128.1 kgf. The cylinder is double-acting, adjusts up to 75 mm off the 225 mm stroke, cushions at both ends, runs on 0.15-1.0 MPa (22-145 psi) filtered air at 30-800 mm/s.
The stop screw is a mechanical end stop that fixes the shortened extend position during normal running. It is not a load-holding brake: with air lost, the piston can still be displaced. For loads that must stay in place, pair the cylinder with a locking valve or an external clamp.
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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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