Airtac MF32-40 Stainless Steel Mini Cylinder MF40X250SU
The AirTAC Airtac MF32-40 Stainless Steel Mini Cylinder MF40X250SU is a genuine double acting JIS-standard round-body mini air cylinder with a Ø40mm bore and 250mm 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
- Stroke250 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 MF40X250SU
Generating 628.3 N of push force at 0.5 MPa, this double-acting 40 mm bore cylinder is built for demanding fixture tasks. The JIS-standard round body is physically shorter than a comparable ISO 6432 unit, saving valuable mounting length in tight machinery. It features a SUS304 stainless steel barrel with riveted aluminium covers to resist mild corrosion and washdown.
The piston relies on a two-way oil-retaining seal for long life, while fixed TPU bumper pads and a front-cover anti-impact pad soften stroke-end impacts. Because the magnet is present (-S), you can mount CMSG, DMSG or EMSG sensors directly. Plan for about 377 N of actual work at 0.5 MPa, which means it lifts roughly 32 kg vertically with a 2:1 safety margin.
Airtac MF32-40 Stainless Steel Mini Cylinder MF40X250SU Technical Specifications
| Model | Airtac MF32-40 Stainless Steel Mini Cylinder MF40X250SU |
|---|---|
| Series | MF JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 250 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 MF40X250SU
| MF | JIS-standard round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×250 | 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 MF40X250SU Is Used
Pallet Diverting Gate
Swings a heavy routing gate on a packaging line, using the 628.3 N push force to shift loaded pallets laterally without stalling.
Press Fit Bushings
Drives small metal bushings into aluminium housings on an assembly press, relying on the 250 mm stroke to reach deep into the fixture.
Carton Flap Folding
Folds heavy cardboard flaps prior to taping in a high-speed carton erector, where the U flat-end back cover mounts flush to the frame.
Is the Airtac MF32-40 Stainless Steel Mini Cylinder MF40X250SU the Right Cylinder?
When sizing this 40 mm bore, step down to the MF32 if your task needs only 402.2 N at 0.5 MPa, as 40 mm is the largest available MF bore. The 1/4" port matches the 16 mm rod and M14x1.5 male thread. With a 250 mm stroke, ensure your mounting method—such as LB foot, FA flange, or TC trunnion—prevents rod side-loading and bending.
This SKU includes the U flat-end back cover. If air pressure drops or the valve is centred, the piston will drift; the bumpers only decelerate the end of travel and do not act as a brake. Use an external rod lock or pilot check valve to hold a suspended 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 MF40X250SU FAQ
At 0.5 MPa it pushes 628.3 N and pulls 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 cylinder uses a 1/4" air port and a 16 mm rod with an M14x1.5 male thread.
Yes, the -S suffix means it has a built-in magnet for CMSG, DMSG and EMSG switches. It is a JIS-standard round-body cylinder that is physically shorter than an ISO 6432 cylinder for the same 40 mm bore and 250 mm stroke, saving mounting space. It uses fixed TPU bumper pads 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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