Airtac MF32-40 Stainless Steel Mini Cylinder MF40X250U
The AirTAC Airtac MF32-40 Stainless Steel Mini Cylinder MF40X250U 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 MF40X250U
Delivering 628.3 N of push force at 0.5 MPa, this double-acting 40 mm bore unit handles heavy-duty actuation across its 250 mm stroke. The JIS-standard round-body construction packages the mechanism into a shorter overall length than a comparable ISO 6432 cylinder, saving valuable mounting space in tight machinery. A 1/4 inch port supplies air to drive the 16 mm rod at speeds between 30 and 800 mm/s.
The SUS304 stainless steel barrel and riveted aluminium covers resist mild corrosion and washdown environments. Inside, a heterogeneous two-way seal retains an oil film for long service life, while fixed TPU bumper pads and a front-cover anti-impact pad absorb stroke-end shock. Because this specific SKU lacks the -S magnet, it cannot accept CMSG, DMSG, or EMSG position switches. Plan for roughly 377 N of actual work at 0.5 MPa, which translates to lifting about 32 kg vertically with a 2:1 safety margin.
Airtac MF32-40 Stainless Steel Mini Cylinder MF40X250U Technical Specifications
| Model | Airtac MF32-40 Stainless Steel Mini Cylinder MF40X250U |
|---|---|
| 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 MF40X250U
| 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 MF40X250U Is Used
Pallet Diverting Gate
Pushes heavy timber pallets sideways onto a secondary packaging line using the full 628.3 N push force at 0.5 MPa.
Press Die Loader
Lowers stamping dies into the press bed over a 250 mm travel, relying on the SUS304 barrel to withstand workshop coolant spray.
Carton Stacking Arm
Actuates a mechanical gripper to stack filled beverage cartons, utilizing the compact JIS body length to fit narrow framing.
Is the Airtac MF32-40 Stainless Steel Mini Cylinder MF40X250U the Right Cylinder?
When sizing this 40 mm bore, verify your actual load requirements against the 628.3 N push rating at 0.5 MPa. If your application demands less force, stepping down to the MF32 provides 402.2 N at the same pressure; since 40 mm is the largest available bore in the MF family, moving beyond this capacity requires a different cylinder series entirely. The flat-end U back cover suits installations needing a flush rear mount.
This standard configuration cannot hold a suspended load if air pressure drops or the valve is centred, as the piston will drift and the TPU bumpers only decelerate the stroke end without acting as a brake. To secure a vertical load, integrate an external rod lock or a pilot-operated check valve. For the 250 mm stroke, ensure the front mounting is rigid to prevent rod bending under side loads, and note that position sensing requires switching to an -S magnet variant.
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 MF40X250U 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. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
No, this specific SKU does not include a magnet, so it cannot accept CMSG, DMSG, or EMSG switches. You would need the -S variant for sensing. It features a flat-end U back cover and fixed TPU bumper pads that decelerate the stroke end rather than providing an adjustable air cushion.
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Covers non-human-caused product damage.
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