
The AirTAC Airtac MF32-40 Stainless Steel Mini Cylinder MF32X320SCM is a genuine double acting JIS-standard round-body mini air cylinder with a Ø32mm bore and 320mm 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 double-acting JIS-standard round-body mini cylinder is built around a SUS304 stainless-steel barrel with riveted aluminium covers. The rolling-packed structure resists 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 handle about 241 N of real work at 0.5 MPa, which equates to safely lifting a 20.5 kg mass vertically with a 2:1 margin.
This 32 mm bore, 320 mm stroke variant features a 1/4 inch air port and a male M10x1.25 rod thread. Because the MF body is physically shorter than a comparable ISO 6432 cylinder for the same envelope, it provides a distinct packaging advantage in tight machinery. The stroke end is softened by fixed TPU bumper pads and a front-cover anti-impact pad, which decelerate the piston without offering adjustable cushioning.
| Model | Airtac MF32-40 Stainless Steel Mini Cylinder MF32X320SCM |
|---|---|
| Series | MF JIS mini cylinder |
| Bore size | Ø32 mm |
| Stroke | 320 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. |
| ×320 | 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.
Actuates a routing flap on a 320 mm stroke to redirect 20 kg cartons between sorting lanes, utilising the 402.2 N push force to overcome guide friction.
Advances raw material stock into the collet chuck, where the compact JIS body length saves valuable mounting space along the lathe headstock.
Lifts tote bins weighing up to 20.5 kg between conveyor tiers, relying on the CMSG sensor magnet for precise upper-tier positioning.
When sizing this actuator, stepping down to an MF25 bore drops the 0.5 MPa push force to 245.3 N, whereas stepping up to an MF40 bore increases it to 628.3 N. The integrated -S piston magnet allows direct mounting of CMSG, DMSG, or EMSG electronic switches for position confirmation. The CM round-end back cover suits pivot mounting, and you can pair the body with LB foot, FA flange, SDB pivot, or TC trunnion hardware.
At 320 mm of travel, side loading becomes a critical factor, so ensure the rod end is guided to prevent premature seal wear and rod bending. Note that a standard double-acting cylinder will drift if air pressure is lost or the directional valve is centred; the bumpers only soften the end of stroke and do not function as a braking mechanism. To suspend a load safely mid-cycle, incorporate an external rod lock or a pilot-operated check valve into your pneumatic circuit.
Quick checklist
This 32 mm bore cylinder features a 1/4 inch air port and an M10x1.25 male rod thread. At 0.5 MPa it generates 402.2 N of push force and 345.6 N of pull force. At 0.7 MPa the push increases to 563 N and the pull to 483.8 N. The theoretical maximum force is 82 kgf at 1.0 MPa.
No, the base MF uses fixed TPU bumper pads that merely decelerate the stroke end; it does not have an adjustable air cushion like the MFC variant. Furthermore, the cylinder cannot hold a load if air is lost and will drift, so an external rod lock or pilot check valve is required for position holding. The CM round-end back cover and shorter-than-ISO-6432 body length aid tight machinery packaging.
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