Airtac MF32-40 Stainless Steel Mini Cylinder MF40X225SU
The AirTAC Airtac MF32-40 Stainless Steel Mini Cylinder MF40X225SU is a genuine double acting JIS-standard round-body mini air cylinder with a Ø40mm bore and 225mm stroke, 1/4" air ports and a SUS304 stainless-steel barrel for mildly corrosive environments. For the same bore and stroke it is shorter than an ISO 6432 cylinder, saving mounting space.
- BoreØ40 mm
- Stroke225 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM14×1.5
- CushionFixed TPU 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 MF32-40 Stainless Steel Mini Cylinder MF40X225SU
Delivering 628.3 N of push force at 0.5 MPa, this 40 mm bore double-acting actuator features a 225 mm stroke and a 1/4 inch air port. Because it follows JIS dimensional standards, the round-body SUS304 stainless steel barrel and riveted aluminium covers create a physical envelope that is noticeably shorter than an ISO 6432 cylinder of the exact same capacity, saving valuable mounting length in dense machinery. The riveted rolling-packed structure shrugs off mild corrosion and washdown environments.
The internal piston relies on a heterogeneous two-way seal that retains an oil film for long-term lubrication, while fixed TPU bumper pads and a front-cover anti-impact pad absorb stroke-end shock. Equipped with a built-in magnet (-S) and a flat-end U back cover, this unit supports CMSG, DMSG, and EMSG position switches. Plan for roughly 377 N of actual work at 0.5 MPa to maintain a safe margin, which translates to lifting about 32 kg vertically.
Airtac MF32-40 Stainless Steel Mini Cylinder MF40X225SU Technical Specifications
| Model | Airtac MF32-40 Stainless Steel Mini Cylinder MF40X225SU |
|---|---|
| Series | MF JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 225 mm |
| Acting type | Double acting |
| Port size | 1/4" |
| Rod thread | M14×1.5 |
| 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 TPU bumper pads |
| Max standard stroke | Up to 500 mm |
Specifications follow the official AirTAC MF/MFC (JIS-standard) datasheet. Barrel: SUS304 stainless steel; covers: aluminum alloy (round-body, riveted rolling-packed construction). Thread options: PT (blank) / G / NPT.
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 MF32-40 Stainless Steel Mini Cylinder MF40X225SU
| MF | JIS-standard round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×225 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSG / DMSG / EMSG sensors. |
MF-family variants: MF / MFC (double acting ±cushion), MSF / MTF (single acting push / pull), MFD / MFCD (double rod ±cushion), MFJ / MFCJ (adjustable stroke ±cushion). Back covers CA / U / CM. Mounting LB / FA / SDB / TC.
Where the Airtac MF32-40 Stainless Steel Mini Cylinder MF40X225SU Is Used
Carton Diverting Gate
Actuates a heavy routing flap on a packaging conveyor, using the 628.3 N thrust to push dense corrugated boxes smoothly into secondary processing lanes.
Palletiser Top Platen
Drives a 225 mm stroke top-press plate to stabilize stacked goods before stretch wrapping, ensuring layers settle evenly without shifting during transit.
Injection Mould Ejection
Extends a secondary knock-out arm to free stubborn plastic parts from deep mould cavities, leveraging the robust 1/4 inch port for rapid retraction cycles.
Is the Airtac MF32-40 Stainless Steel Mini Cylinder MF40X225SU the Right Cylinder?
When sizing this 40 mm unit, compare its 628.3 N push force at 0.5 MPa against the smaller MF32 bore, which yields 402.2 N under identical pressure; since 40 mm is the largest available MF diameter, moving beyond this capacity requires a different cylinder family entirely. The integrated magnet allows seamless mounting of CMSG, DMSG, or EMSG sensors for end-of-stroke confirmation. With a 225 mm extension, avoid heavy side loads that could bend the 16 mm rod, and utilize LB foot, FA flange, SDB pivot, or TC trunnion mounts to support the assembly properly.
Remember that the fixed TPU bumpers only soften the end-of-stroke impact and do not function as a braking mechanism. If your application cannot tolerate downward drift upon loss of air pressure or valve centring, you must incorporate an external rod lock or a pilot-operated check valve to secure the load safely.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Back cover (CA/U/CM) & mount (LB/FA/SDB/TC)
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 Use correct back cover (CA/U/CM) & mount (LB/FA/SDB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac MF32-40 Stainless Steel Mini Cylinder MF40X225SU FAQ
This 40 mm bore cylinder features a 1/4 inch air port and an M14x1.5 male rod thread. It generates 628.3 N push and 527.8 N pull at 0.5 MPa, increasing to 879.6 N push and 738.9 N pull at 0.7 MPa, with a theoretical maximum force of 128.1 kgf at 1.0 MPa.
No, the fixed TPU bumper pads only decelerate the piston near the stroke end and act as neither a lock nor a brake. If air is lost or the valve is centred, the rod will drift, so an external rod lock or pilot check valve is required to hold a vertical load securely.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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