
The AirTAC Airtac MF32-40 Stainless Steel Mini Cylinder MF32X170SU is a genuine double acting JIS-standard round-body mini air cylinder with a Ø32mm bore and 170mm 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.
Delivering 402.2 N of push force at 0.5 MPa, this 32 mm bore double-acting actuator uses a SUS304 stainless barrel with riveted aluminium covers to resist mild washdown. The JIS-standard round body is physically shorter than a comparable ISO 6432 cylinder for the same 170 mm stroke, saving valuable mounting length in tight machinery. A 1/4 inch port drives the 12 mm rod, and fixed TPU bumper pads soften stroke-end impact.
The built-in piston magnet supports CMSG, DMSG, and EMSG switches for position sensing, while the flat-end U back cover suits flush mounting. Plan for roughly 241 N of actual work at 0.5 MPa, which safely lifts about 20.5 kg vertically with a 2:1 margin. The two-way oil-retaining seal ensures long service life across the 30-800 mm/s speed range.
| Model | Airtac MF32-40 Stainless Steel Mini Cylinder MF32X170SU |
|---|---|
| Series | MF JIS mini cylinder |
| Bore size | Ø32 mm |
| Stroke | 170 mm |
| Acting type | Double acting |
| Port size | 1/4" |
| Rod thread | M10×1.25 |
| 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.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | 484 N |
| Max (@1.0 MPa) | 82 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
| MF | JIS-standard round-body mini cylinder (double-acting). |
|---|---|
| 32 | Bore size in mm. |
| ×170 | 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.
Pushes lightweight packaging cartons at 90 degrees along a sorting line using 402.2 N of thrust, with the U flat-end cover mounting flush against the conveyor frame.
Ejects stamped metal parts from a die bed using the 170 mm stroke, relying on the fixed TPU bumper pads to absorb the end-of-travel impact without adjustable cushions.
Raises lightweight plastic totes vertically; safely lifts about 20.5 kg with a 2:1 safety margin at 0.5 MPa while the DMSG sensor confirms the top position.
When sizing this 32 mm bore, the smaller MF25 provides 245.3 N at 0.5 MPa, whereas stepping up to the MF40 yields 628.3 N. If your process drops air pressure or the valve centres, the piston will drift and cannot hold a load; the bumpers only decelerate the stroke end. To lock a suspended weight, add an external rod lock or a pilot-operated check valve. The included -S magnet enables solid-state or reed sensors, and the 170 mm stroke pairs well with LB foot or FA flange mounts to manage side loads and prevent rod bending.
Quick checklist
This 32 mm bore cylinder features a 1/4 inch port and an M10x1.25 male rod thread. It generates 402.2 N push and 345.6 N pull at 0.5 MPa, 563 N push and 483.8 N pull at 0.7 MPa, with a theoretical maximum of 82 kgf at 1.0 MPa.
For the same 32 mm bore and 170 mm stroke, the JIS round-body design is shorter than an ISO 6432 cylinder, saving mounting length. The SUS304 stainless barrel resists corrosion, the flat-end U rear cover allows direct back mounting, and the -S magnet supports CMSG, DMSG, or EMSG sensors.
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