Airtac MF20-25 Stainless Steel Mini Cylinder MF20X125SU
The AirTAC Airtac MF20-25 Stainless Steel Mini Cylinder MF20X125SU is a genuine double acting JIS-standard round-body mini air cylinder with a Ø20mm bore and 125mm 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
- Stroke125 mm
- Port size1/8"
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionFixed TPU bumper pads
About the Airtac MF20-25 Stainless Steel Mini Cylinder MF20X125SU
Delivering 157 N of push force at 0.5 MPa, this double-acting JIS-standard round-body mini cylinder uses a SUS304 stainless barrel with riveted aluminium covers to resist mild corrosion and washdown. Because the MF body is shorter than an ISO 6432 cylinder for the same 20 mm bore and 125 mm stroke, it saves valuable mounting length in tight fixtures. The U flat-end rear cover and 1/8" port streamline integration, while the piston's two-way seal retains an oil film for long life.
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. Plan for roughly 94 N of real work at 0.5 MPa, or expect it to lift about 8 kg vertically with a 2:1 safety margin. The built-in magnet (-S) directly supports CMSG, DMSG, and EMSG switches for position sensing.
Airtac MF20-25 Stainless Steel Mini Cylinder MF20X125SU Technical Specifications
| Model | Airtac MF20-25 Stainless Steel Mini Cylinder MF20X125SU |
|---|---|
| Series | MF JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 125 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 MF20X125SU
| MF | JIS-standard round-body mini cylinder (double-acting). |
|---|---|
| 20 | Bore size in mm. |
| ×125 | 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 MF20X125SU Is Used
PCB Depaneling Router
Pushes a linear guide carriage on a depaneling machine, using the 8 kg vertical lift capacity to handle light routing heads while the short JIS body fits inside dense electronics fixtures.
Package Divert Arm
Actuates a lightweight sorting flap on a conveyor line, where the 1/8" port allows rapid cycling and the SUS304 barrel withstands occasional washdown in packaging zones.
Small Part Ejector
Ejects moulded plastic parts from a press, applying 94 N of working force to clear the die area efficiently without overstressing delicate components.
Is the Airtac MF20-25 Stainless Steel Mini Cylinder MF20X125SU the Right Cylinder?
When sizing this 20 mm bore unit, stepping up to the MF25 increases the 0.5 MPa push force to 245.3 N for heavier demands, while no smaller MF bore exists if you need less power. The fixed TPU bumpers only soften the stroke end; they do not function as a lock, so the piston will drift if air is lost or the valve is centred. Use an external rod lock or pilot check valve for held loads.
This SKU includes the -S magnet for CMSG, DMSG, or EMSG sensors. With a 125 mm stroke, ensure your mounting arrangement—whether LB foot, FA flange, or TC trunnion—prevents side loading to avoid rod bending and premature seal wear.
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 MF20X125SU FAQ
This 20 mm bore cylinder features a 1/8" air port and an M8x1.25 male 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 force of 32 kgf at 1.0 MPa.
It does not conform to ISO 6432, though its riveted round body is intentionally shorter than an ISO 6432 cylinder to save mounting length. The -S magnet enables CMSG, DMSG, and EMSG switches, and it uses fixed TPU bumper pads for deceleration rather than an adjustable air cushion.
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