Airtac MF20-25 Stainless Steel Mini Cylinder MF20X10SU
The AirTAC Airtac MF20-25 Stainless Steel Mini Cylinder MF20X10SU is a genuine double acting JIS-standard round-body mini air cylinder with a Ø20mm bore and 10mm 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
- Stroke10 mm
- Port size1/8"
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionFixed TPU bumper pads
About the Airtac MF20-25 Stainless Steel Mini Cylinder MF20X10SU
Delivering 157 N of push force at 0.5 MPa, the AirTAC MF20X10SU is a double-acting JIS-standard round-body mini cylinder built for exceptionally tight spaces. Its SUS304 stainless steel barrel and riveted aluminium covers shrug off mild corrosion, while the internal two-way seal retains an oil film for smooth, long-lasting operation. Because the MF body is physically shorter than a comparable ISO 6432 cylinder for the same 20 mm bore and 10 mm stroke, it saves valuable mounting length in dense tooling layouts.
This specific configuration includes a U-style flat-end back cover and a built-in piston magnet (-S) for direct mounting of CMSG, DMSG, or EMSG switches. Fixed TPU bumper pads and a front-cover anti-impact pad work together to soften stroke-end impacts without the tuning hassle of an adjustable cushion. Plan for about 94 N of actual work at 0.5 MPa (roughly 60 percent of the rated push), which means it can safely lift an 8 kg vertical load with a 2:1 safety margin. Air connects via a 1/8" port.
Airtac MF20-25 Stainless Steel Mini Cylinder MF20X10SU Technical Specifications
| Model | Airtac MF20-25 Stainless Steel Mini Cylinder MF20X10SU |
|---|---|
| Series | MF JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 10 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 MF20X10SU
| MF | JIS-standard round-body mini cylinder (double-acting). |
|---|---|
| 20 | Bore size in mm. |
| ×10 | 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 MF20X10SU Is Used
Micro-Clamping in CNC Vises
Uses the 157 N push force at 0.5 MPa to secure small aluminium brackets inside a machining center, taking advantage of the ultra-short 10 mm stroke to fit within a crowded tooling column.
PCB Ejector Mechanism
Pushes delicate printed circuit boards out of a test fixture with an 8 kg vertical lift equivalent, relying on the -S magnet and DMSG switch to confirm ejection before the conveyor advances.
Film Cutting Press
Drives a small guillotine blade to sever packaging film, where the fixed TPU bumper pads adequately absorb the impact of the 10 mm stroke without needing an adjustable air cushion.
Is the Airtac MF20-25 Stainless Steel Mini Cylinder MF20X10SU the Right Cylinder?
When sizing this 20 mm bore actuator, consider stepping up to the MF25 if your fixture requires more force, as the 25 mm bore delivers 245.3 N of push at 0.5 MPa compared to this model's 157 N. Since 20 mm is the smallest available MF bore, there is no smaller option for lighter-duty tasks. The integrated -S magnet allows for precise end-of-stroke sensing using CMSG or DMSG reed switches.
Keep in mind that a standard double-acting cylinder relies entirely on continuous air pressure to maintain its position; if air is lost or the control valve is centred, the rod will drift and the bumpers will not act as a braking mechanism. For applications requiring a held load, you must add an external pilot check valve or a dedicated rod lock. Furthermore, despite the very short 10 mm stroke, always minimize side-loading on the M8x1.25 male rod thread to prevent premature seal wear and rod binding.
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 MF20X10SU FAQ
This 20 mm bore cylinder features a 1/8" air port and an M8x1.25 male rod thread. It generates 157 N of push and 131.9 N of pull at 0.5 MPa, increasing to 219.8 N push and 184.7 N pull at 0.7 MPa. The theoretical maximum force is 32 kgf at 1.0 MPa.
The JIS-standard body is intentionally shorter than an ISO 6432 cylinder of the same bore and stroke, saving mounting length. It uses fixed TPU bumper pads to decelerate the piston at the stroke end rather than an adjustable air cushion. The U-style flat-end back cover allows direct mounting to flat surfaces.
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