
The AirTAC Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC20X350SU is a genuine double acting + cushion JIS-standard round-body mini air cylinder with a Ø20mm bore and 350mm 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.
Delivering 157 N of push force at 0.5 MPa, this double-acting JIS-standard round-body mini cylinder integrates a needle-adjustable variable air cushion at both ends to absorb high-speed end-of-stroke shock. The SUS304 stainless barrel and riveted aluminium covers resist mild corrosion and washdown environments. For the same bore and stroke, the MFC body is shorter than an ISO 6432 cylinder, saving valuable mounting length.
Equipped with a U flat-end back cover and a built-in piston magnet (-S), this 20 mm bore unit accepts CMSG, DMSG, or EMSG reed and electronic switches. It features an 8 mm rod, an M8x1.25 male thread, and a 1/8 inch port. Based on the 0.5 MPa thrust, it provides a safe working load of roughly 94 N and lifts about 8 kg vertically with a 2:1 margin.
| Model | Airtac MFC Cushioned Stainless Steel Mini Cylinder MFC20X350SU |
|---|---|
| Series | MFC JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 350 mm |
| Acting type | Double acting + cushion |
| 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 | Variable air cushion, both ends |
| 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.
| MFC | JIS-standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×350 | 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 small parcels on a high-speed sorting line using 94 N of safe working force, relying on the adjustable air cushion to stop the 350 mm stroke without slamming.
Ejects light machined parts from a fixture at speed; the needle-set cushion absorbs the end shock to protect delicate surface finishes.
Raises a 8 kg access flap vertically with a 2:1 safety margin, using the U flat-end cover for direct rear mounting and the -S magnet for top confirmation.
If 157 N push at 0.5 MPa is insufficient, step up to the MFC25 which provides 245.3 N; this MFC20 is the smallest available bore. The variable air cushion is essential when driving heavier loads at high speeds up to 800 mm/s, as it decelerates the piston smoothly. Remember that the cushion only reduces end impact and does not lock the piston—on air loss the rod drifts, so fit an external rod lock or pilot check valve to hold a suspended load.
This SKU includes the -S magnet for position sensing and uses a U flat-end rear cover. Mounting options include LB foot, FA flange, SDB pivot, and TC trunnion brackets to suit your layout.
Quick checklist
This 20 mm bore cylinder has a 1/8 inch port and an 8 mm rod. It generates 157 N push and 131.9 N pull at 0.5 MPa, 219.8 N push and 184.7 N pull at 0.7 MPa, with a theoretical maximum of 32 kgf at 1.0 MPa.
No, the variable air cushion only decelerates the piston near the stroke end and acts as neither a lock nor a brake. If air is lost the piston will drift, so you must use an external rod lock or pilot check valve to suspend a load safely.
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