Airtac MF32-40 Stainless Steel Mini Cylinder MF40X400SU
The AirTAC Airtac MF32-40 Stainless Steel Mini Cylinder MF40X400SU is a genuine double acting JIS-standard round-body mini air cylinder with a Ø40mm bore and 400mm 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
- Stroke400 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 MF40X400SU
Generating up to 628.3 N of push force at 0.5 MPa, this double-acting AirTAC MF40X400SU is a JIS-standard round-body mini cylinder built for demanding 40 mm bore tasks. Because the riveted rolling-packed structure is shorter than an ISO 6432 cylinder of the same bore and stroke, it saves valuable mounting length in tight machine fixtures. The SUS304 stainless steel barrel and aluminium covers resist mild corrosion and washdown, while the piston's two-way seal retains an oil film for long service life.
Equipped with a built-in magnet (-S) for CMSG, DMSG, or EMSG switches, the unit also features a flat-end U back cover for direct rear mounting. Fixed TPU bumper pads and a front-cover anti-impact pad soften stroke-end impact by decelerating the piston. Plan for about 377 N of actual work at 0.5 MPa, which means it can safely lift a 32 kg vertical load with a 2:1 safety margin.
Airtac MF32-40 Stainless Steel Mini Cylinder MF40X400SU Technical Specifications
| Model | Airtac MF32-40 Stainless Steel Mini Cylinder MF40X400SU |
|---|---|
| Series | MF JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 400 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 MF40X400SU
| MF | JIS-standard round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×400 | 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 MF40X400SU Is Used
Carton Diverter Arm
Uses the 628.3 N push force to swing heavy cardboard packaging across a high-speed sorting line.
Pneumatic Press Platen
Leverages the 400 mm stroke to lower a forming tool into a packaging press, relying on the U flat-end rear cover for stable mounting.
Pallet Stop Gate
Deploys the 40 mm bore rod to halt loaded pallets on a conveyor, safely absorbing impact with fixed TPU bumper pads.
Is the Airtac MF32-40 Stainless Steel Mini Cylinder MF40X400SU the Right Cylinder?
When sizing this 40 mm bore unit, stepping down to the MF32 yields 402.2 N of push force at 0.5 MPa, whereas the MF40 is the largest available in the series. If your fixture requires position holding on air loss, note that a plain cylinder drifts when the valve is centred; the bumpers only decelerate the end of travel and act as neither a lock nor a brake. For secured loads, install an external rod lock or a pilot-operated check valve.
The 400 mm stroke on this Ø16 mm rod requires careful alignment to prevent rod bending and premature seal wear under side loads. You can mount the body using LB foot brackets, FA flanges, SDB pivot blocks, or TC trunnions. The 1/4" port matches the 40 mm bore specification.
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 MF40X400SU FAQ
At 0.5 MPa it pushes with 628.3 N and pulls with 527.8 N. At 0.7 MPa it pushes 879.6 N and pulls 738.9 N. The theoretical maximum force is 128.1 kgf at 1.0 MPa. This 40 mm bore model uses a 1/4" air port and an M14x1.5 male rod thread.
The JIS-standard SUS304 stainless round body is shorter than an ISO 6432 cylinder, saving space. The -S suffix indicates a built-in magnet for CMSG, DMSG, or EMSG switches. It uses fixed TPU bumper pads to decelerate the stroke end rather than an adjustable air cushion.
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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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