Airtac MF20-25 Stainless Steel Mini Cylinder MF20X120U
The AirTAC Airtac MF20-25 Stainless Steel Mini Cylinder MF20X120U is a genuine double acting JIS-standard round-body mini air cylinder with a Ø20mm bore and 120mm 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.
- BoreØ20 mm
- Stroke120 mm
- Port size1/8"
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionFixed TPU bumper pads
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MF20-25 Stainless Steel Mini Cylinder MF20X120U
Generating 157 N of push force at 0.5 MPa, this double-acting 20 mm bore cylinder is built around a SUS304 stainless barrel with riveted aluminium covers. The riveted rolling-packed structure resists mild corrosion and washdown, while the piston's two-way seal retains an oil film for long service life. It features a 1/8" port and an M8x1.25 male rod thread.
Because the JIS-standard round body is physically shorter than an ISO 6432 cylinder of the same bore and stroke, it saves valuable mounting length in tight fixtures. Plan for about 94 N of real work at 0.5 MPa, which means it lifts roughly 8 kg vertically with a 2:1 safety margin. The stroke end is decelerated by fixed TPU bumper pads and a front-cover anti-impact pad, though this SKU lacks a magnet and cannot accept position sensors.
Airtac MF20-25 Stainless Steel Mini Cylinder MF20X120U Technical Specifications
| Model | Airtac MF20-25 Stainless Steel Mini Cylinder MF20X120U |
|---|---|
| Series | MF JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 120 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.
Theoretical Output Force (Ø20mm)
| 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.
Model Code: Airtac MF20-25 Stainless Steel Mini Cylinder MF20X120U
| MF | JIS-standard round-body mini cylinder (double-acting). |
|---|---|
| 20 | Bore size in mm. |
| ×120 | 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.
Where the Airtac MF20-25 Stainless Steel Mini Cylinder MF20X120U Is Used
PCB Depaneling Gate
Cycles a lightweight routing blade to singulate printed circuit boards, using the 120 mm stroke to clear the fixture during tool changes.
Carton Flap Tucker
Folds small corrugated carton flaps prior to sealing, where the 157 N push force easily overcomes board resistance without crushing the package.
Plastic Mould Eject
Pushes small injection-moulded parts clear of a cavity, leveraging the compact JIS body to fit within densely packed multi-cavity tooling.
Is the Airtac MF20-25 Stainless Steel Mini Cylinder MF20X120U the Right Cylinder?
If 157 N of push at 0.5 MPa is insufficient, step up to the MF25, which provides 245.3 N; there is no smaller bore in the MF family. The 120 mm stroke is well within the 500 mm standard limit, but at this length you should watch for side-loading and rod-bending forces to prevent premature seal wear. This specific model uses a U flat-end back cover.
Without air or a centred valve, the piston drifts freely—the bumpers only soften the end of travel and do not act as a brake. To suspend a load safely, install an external rod lock or a pilot-operated check valve. Since this unit has no -S suffix, it cannot host CMSG, DMSG, or EMSG switches.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Back cover (CA/U/CM) & mount (LB/FA/SDB/TC)
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Do not dismantle the riveted front/back covers.
- check Use correct back cover (CA/U/CM) & mount (LB/FA/SDB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac MF20-25 Stainless Steel Mini Cylinder MF20X120U FAQ
This 20 mm bore cylinder has a 1/8" port and an M8x1.25 rod thread. 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, this SKU lacks the internal magnet required for switches. You must order the -S variant to use CMSG, DMSG, or EMSG sensors. The unit uses a U flat-end back cover and relies on fixed TPU bumper pads, not an adjustable air cushion, to decelerate the stroke end.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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