Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X225-40S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X225-40S 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 MACJ40X225-40S
At 0.7 MPa this 40 mm bore develops 879.6 N of push, and even at 0.5 MPa you get 628.3 N push and 527.8 N pull - enough to lift about 64 kg vertically, or roughly 32 kg with a 2:1 safety margin on real part weights. The MACJ40X225-40S adds a 40 mm window in which the extend stroke can be shortened on site, the widest trim range in the range, plus a variable air cushion at both ends for clean stops at 30-800 mm/s.
The 225 mm stroke suits gates, ejectors and presses that need reach as well as force, and the stainless barrel with hard-chrome 20 um rod keeps performing in washdown or outdoor duty. Control wiring is simple: the magnet is built in as standard, so CMSG, DMSG or EMSG switches clamp on anywhere along the tube. Bear in mind the 40 mm stop only marks where the extend stroke ends - on air loss the piston still moves, so it is not a load-holding device.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X225-40S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X225-40S |
|---|---|
| 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 MACJ40X225-40S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×225 | 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 MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X225-40S Is Used
Panel stake press on an HVAC duct line
Stakes sheet-metal joints on galvanised ducting; 879.6 N of push at 0.7 MPa sets stakes cleanly, and the 40 mm trim window handles different duct depths on one fixture.
Tote divert arm in a pick module
Sweeps totes off a takeaway conveyor into a pick lane; the both-end cushion lets the arm run fast without jolting the tote off its rollers, and the magnet confirms each divert.
Probe actuator on a leak-test bench
Seals a test probe into fittings before pressurising; the 32 kg vertical-lift margin covers heavier probe heads, and the stainless body copes with coolant mist in the test cell.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X225-40S the Right Cylinder?
Between the 32 mm bore at 402 N and the 50 mm bore at 981 N (both at 0.5 MPa), this 40 mm bore is the balanced choice for medium clamping and pushing. Pick the -40 window when setup crews need maximum latitude in setting the extend stroke; choose -10 or -20 for fine positioning. FA flange and LB foot mounts, with I or Y knuckles for pivoting loads, suit most frames. Over a 225 mm stroke, support long tooling or guide the load externally so the 16 mm rod sees no side load.
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 MACJ40X225-40S FAQ
Use 628.3 N push and 527.8 N pull at 0.5 MPa, or 879.6 N push and 738.9 N pull at 0.7 MPa; the theoretical ceiling is 128.1 kgf at 1.0 MPa. It operates on 0.15-1.0 MPa (22-145 psi) filtered air with 1.5 MPa (215 psi) proof pressure, moves at 30-800 mm/s between -20 and +70 C, and its extend stroke is adjustable within the 40 mm window. Port is 1/8"; rod thread M12x1.25 on a 16 mm rod.
An external stop screw on the back cover sets where the extend stroke ends, anywhere up to 40 mm short of the full 225 mm ordered stroke - it shortens the stroke, never lengthens it. Mechanically the FA flange bolts to a machine face while the LB foot bolts underneath; I and Y rod knuckles handle pivoting loads. If the application must hold position through an air failure, add a valve circuit or external stop, since the adjuster is not a brake.
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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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