
The AirTAC Airtac MF32-40 Stainless Steel Mini Cylinder MF32X140SCM is a genuine double acting JIS-standard round-body mini air cylinder with a Ø32mm bore and 140mm 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 features a JIS-standard round-body construction that is physically shorter than a comparable ISO 6432 cylinder, saving valuable mounting length in tight machinery. The SUS304 stainless steel barrel and riveted aluminium covers resist mild corrosion and washdown environments, while the piston's two-way seal retains an oil film for extended mechanical life.
Equipped with a built-in magnet for position sensing, the unit accepts CMSG, DMSG, or EMSG switches. Fixed TPU bumper pads and a front-cover anti-impact pad soften the stroke-end impact. For real-world work at 0.5 MPa, plan for roughly 241 N of usable load, which translates to safely lifting about 20.5 kg vertically with a 2:1 safety margin. The 1/4" port and M10x1.25 male rod thread handle the required airflow for its 30-800 mm/s speed range.
| Model | Airtac MF32-40 Stainless Steel Mini Cylinder MF32X140SCM |
|---|---|
| Series | MF JIS mini cylinder |
| Bore size | Ø32 mm |
| Stroke | 140 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. |
| ×140 | 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 routing flaps on logistics conveyors, using the 402.2 N push force to smoothly redirect heavy cardboard cartons at high throughput speeds.
Drives the unclamping mechanism on automated machining centres, where the compact JIS body length saves critical Z-axis space compared to ISO 6432 units.
Raises and lowers sealing jaws on vertical form-fill equipment, safely lifting the roughly 20.5 kg jaw assembly with a 2:1 safety margin at 0.5 MPa.
When sizing this 32 mm bore, stepping down to the MF25 yields 245.3 N at 0.5 MPa, whereas stepping up to the MF40 provides 628.3 N, letting you match the exact force envelope. The included CM round-end back cover suits pivot mounting, and you can pair the body with LB foot, FA flange, SDB pivot, or TC trunnion brackets. Because this SKU includes the -S magnet, it is fully ready for CMSG, DMSG, or EMSG electronic sensors.
At a 140 mm stroke, ensure your mounting geometry minimizes side-load to prevent rod bending and premature seal wear. Note that standard double-acting operation means the piston will drift if air pressure drops or the valve is centred; the TPU bumpers only decelerate the stroke end and do not function as a braking lock. To suspend a load safely during an air loss event, integrate an external rod lock or a pilot-operated check valve into your circuit.
Quick checklist
This 32 mm bore double-acting cylinder uses a 1/4" air 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 force of 82 kgf at 1.0 MPa.
The piston drifts if air is lost, as the fixed TPU bumper pads only decelerate the stroke end rather than locking the load; use an external rod lock or pilot check valve for holding. The built-in -S magnet supports CMSG, DMSG, and EMSG switches, and the CM round-end back cover allows pivot mounting.
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