Airtac MF20-25 Stainless Steel Mini Cylinder MF20X120CM
The AirTAC Airtac MF20-25 Stainless Steel Mini Cylinder MF20X120CM 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
About the Airtac MF20-25 Stainless Steel Mini Cylinder MF20X120CM
Generating 157 N of push force at 0.5 MPa, this double-acting JIS-standard round-body mini cylinder features a SUS304 stainless barrel and aluminium covers joined by a riveted rolling-packed structure. The 1/8" port and M8x1.25 male rod thread keep pneumatic connections compact, while the CM round-end back cover simplifies rear pivot mounting. A heterogeneous two-way seal retains an oil film for long service life.
Because the MF body is shorter than an ISO 6432 cylinder for the same 20 mm bore and 120 mm stroke, it fits tighter fixtures without sacrificing travel. Fixed TPU bumper pads and a front-cover anti-impact pad soften stroke-end impact. 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.
Airtac MF20-25 Stainless Steel Mini Cylinder MF20X120CM Technical Specifications
| Model | Airtac MF20-25 Stainless Steel Mini Cylinder MF20X120CM |
|---|---|
| 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 MF20X120CM
| 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 MF20X120CM Is Used
Small Part Ejection
Pushes lightweight plastic mouldings out of an injection press with 157 N at 0.5 MPa, using the 120 mm stroke to clear the tooling.
Clamp Actuation
Extends a secondary clamp on an assembly fixture where the compact JIS body saves mounting length compared to ISO 6432 equivalents.
Diverter Gate
Moves a routing flap on a packaging conveyor, with the CM round-end cover providing a stable pivot for the 120 mm travel arc.
Is the Airtac MF20-25 Stainless Steel Mini Cylinder MF20X120CM the Right Cylinder?
If your fixture requires less push, the MF25 provides 245.3 N at 0.5 MPa; since 20 mm is the smallest available MF bore, you would step up rather than down for higher loads. This SKU lacks the -S magnet, so it cannot accept CMSG, DMSG or EMSG position switches—choose an -S variant if you need sensing. Mounting options include LB foot, FA flange, SDB pivot and TC trunnion. At a 120 mm stroke, minimize side-loading to prevent rod bending and premature seal wear. Note that a plain MF does not hold its load if air drops or the valve centres—the piston drifts, so add an external rod lock or pilot check valve for suspended loads.
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 MF20X120CM FAQ
At 0.5 MPa it pushes 157 N and pulls 131.9 N; at 0.7 MPa it pushes 219.8 N and pulls 184.7 N. The theoretical maximum force is 32 kgf at 1.0 MPa. The air port is 1/8".
No, this specific SKU does not include a magnet. You must select an -S version of the MF20 to use CMSG, DMSG or EMSG switches. The cylinder relies on fixed TPU bumper pads for end-of-stroke deceleration, not an adjustable air cushion.
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