The AirTAC Airtac MF Mini Cylinders MF20X300SUFA is a genuine double acting JIS-standard round-body mini air cylinder with a Ø20mm bore and 300mm stroke, 1/8" 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.
Around 157 N of push force at 0.5 MPa in a 20 mm bore - that is the working class of the MF20X300SUFA, a double-acting JIS-standard round-body mini cylinder with a 300 mm stroke. Its SUS304 stainless barrel is riveted to aluminium covers in a rolling-packed joint, so the body resists mild corrosion and washdown while staying shorter than an ISO 6432 cylinder of the same bore and stroke - a real gain in tight fixtures. Air ports are 1/8" with an M8x1.25 male rod thread on the 8 mm rod.
Fixed TPU bumper pads at both ends plus a front-cover anti-impact pad soften the stroke-end impact (they decelerate, they do not cushion adjustably). The built-in piston magnet (-S) drives CMSG, DMSG or EMSG switches. Plan on roughly 94 N of real work at 0.5 MPa - about 60% of the 157 N rating - which lifts about 8 kg vertically with a 2:1 margin.
| Model | Airtac MF Mini Cylinders MF20X300SUFA |
|---|---|
| Series | MF JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 300 mm |
| Acting type | Double acting |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| 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 | 157 N | 132 N |
| 0.7 MPa | 220 N | 185 N |
| Max (@1.0 MPa) | 32 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). |
|---|---|
| 20 | Bore size in mm. |
| ×300 | 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.
Indexes a tray of 10 ml vials along a pharmaceutical packaging line; the ~94 N working force at 0.5 MPa moves light plastic trays gently over the 300 mm pitch.
Pushes a lightweight diverter gate on a washdown food-grade conveyor; the SUS304 barrel shrugs off mild cleaning agents and the FA flange bolts straight to the frame.
Ejects finished aluminium fittings from a CNC assembly fixture, using about 8 kg of vertical-lift equivalent with a 2:1 margin to clear the nest every cycle.
At 0.5 MPa this 20 mm bore delivers 157 N push and 131.9 N pull; if your load needs more, step up to the MF25 at 245.3 N push @0.5 MPa - there is no smaller MF bore below 20. The 300 mm stroke sits inside the 500 mm standard range, but keep side loads off the 8 mm rod at this length and guide the part externally. The FA flange mounts the U flat-end back cover solidly, and the -S magnet suits CMSG/DMSG/EMSG switching. Note the rod drifts when air is lost or the valve centres - bumpers only soften the stroke end, so add a pilot check valve or an external rod lock where a load must be held.
Quick checklist
At 0.5 MPa it pushes 157 N and pulls 131.9 N; at 0.7 MPa push rises to 219.8 N. The theoretical maximum is 32 kgf at 1.0 MPa. It is double-acting, runs on 0.15-1.0 MPa air filtered to 40 um, and moves at 30-800 mm/s over its 300 mm stroke.
It is a JIS-standard round-body cylinder - a SUS304 stainless barrel riveted to aluminium covers - shorter than an ISO 6432 cylinder of the same bore and stroke. The -S magnet enables CMSG, DMSG or EMSG switches, the U flat-end back cover pairs with an FA flange, and fixed TPU bumpers decelerate the stroke end without acting as a lock.
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