Airtac MF32-40 Stainless Steel Mini Cylinder MF40X400U
The AirTAC Airtac MF32-40 Stainless Steel Mini Cylinder MF40X400U 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 MF40X400U
Generating 628.3 N of push force at 0.5 MPa, this double-acting JIS-standard round-body mini cylinder handles heavy-duty positioning tasks across its 400 mm travel. The SUS304 stainless steel barrel and riveted aluminium covers resist mild corrosion and washdown, while the piston's two-way seal retains an oil film for extended mechanical life. For practical sizing, plan your fixture to move about 377 N of real work at 0.5 MPa, which equates to safely lifting a 32 kg part vertically against gravity.
Because the MF body is physically shorter than a comparable ISO 6432 cylinder for the same 40 mm bore and 400 mm stroke, it saves valuable mounting length in tight machine envelopes. The 1/4" port feeds air to extend and retract the 16 mm rod, and fixed TPU bumper pads combined with a front-cover anti-impact pad soften the impact at the stroke extremes. This specific U-style SKU lacks the -S magnet, so it cannot accept CMSG, DMSG, or EMSG position switches.
Airtac MF32-40 Stainless Steel Mini Cylinder MF40X400U Technical Specifications
| Model | Airtac MF32-40 Stainless Steel Mini Cylinder MF40X400U |
|---|---|
| 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 MF40X400U
| 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 MF40X400U Is Used
Pallet Diverting
Pushes heavy timber or steel pallets off a high-speed main conveyor line using 628.3 N of thrust over a 400 mm reach.
Vertical Carton Lift
Raises 30 kg packaged goods between floor levels in a packaging cell, safely operating within the 32 kg vertical lift margin.
Press Ejection
Clears stamped metal parts from a hydraulic press bed, utilizing the compact JIS body length to fit within the tight press enclosure.
Is the Airtac MF32-40 Stainless Steel Mini Cylinder MF40X400U the Right Cylinder?
When sizing this 40 mm bore unit, verify if the smaller MF32 provides enough thrust at 402.2 N (0.5 MPa) to save space, or if you need the maximum 628.3 N offered here; note that 40 mm is the largest available MF bore, so moving up in force requires a different cylinder family. With a 400 mm stroke, ensure your mounting arrangement—whether LB foot, FA flange, SDB pivot, or TC trunnion—prevents rod side-loading and bending, and pair the U flat-end back cover appropriately for your pivot or fixed layout.
Remember that a standard double-acting cylinder drifts if air pressure drops or the valve is centered, as the fixed bumpers only decelerate the end-of-stroke impact rather than locking the piston. To prevent a suspended 32 kg load from falling during an air loss event, integrate an external rod lock or a pilot-operated check valve into your pneumatic circuit.
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 MF40X400U FAQ
The 40 mm bore double-acting cylinder has a 1/4" 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. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
No, this specific SKU lacks the internal magnet required for reed or solid-state switches, so it cannot accept CMSG, DMSG, or EMSG sensors. You would need the MF40X400U-S variant for position feedback, though both versions share the same SUS304 stainless barrel, fixed TPU bumpers, and shorter-than-ISO-6432 JIS body.
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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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