Airtac MF20-25 Stainless Steel Mini Cylinder MF20X125CM
The AirTAC Airtac MF20-25 Stainless Steel Mini Cylinder MF20X125CM 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 MF20X125CM
Generating 157 N of push force at 0.5 MPa, this double-acting AirTAC MF20X125CM mini cylinder features a JIS-standard round body that is physically shorter than a comparable ISO 6432 unit, saving valuable mounting length in tight machinery. The SUS304 stainless steel barrel and riveted aluminium covers resist mild corrosion, while the internal two-way seal retains an oil film for extended mechanical life. Equipped with fixed TPU bumper pads and a front-cover anti-impact pad, it decelerates the stroke end effectively. This specific configuration includes a CM round-end rear cover and uses a 1/8" port.
For practical sizing, plan for roughly 94 N of actual work at 0.5 MPa, which means it can comfortably lift an 8 kg vertical load with a standard 2:1 safety margin. Because this SKU lacks the -S suffix, it cannot accept CMSG, DMSG, or EMSG magnetic switches. If your assembly requires variable air cushioning for high-speed cycles, consider the related MFC variant instead of this bumper model.
Airtac MF20-25 Stainless Steel Mini Cylinder MF20X125CM Technical Specifications
| Model | Airtac MF20-25 Stainless Steel Mini Cylinder MF20X125CM |
|---|---|
| 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 MF20X125CM
| 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 MF20X125CM Is Used
PCB Depaneling Ejector
Uses the 157 N push force at 0.5 MPa to safely eject singulated circuit boards from a routing fixture without damaging delicate traces.
Package Sorting Diverter
Employs the 125 mm stroke and CM round-end rear cover to pivot a lightweight guide arm, redirecting small cartons on a packaging line.
Small Part Clamp
Secures plastic housings during an ultrasonic welding process, relying on the SUS304 stainless barrel to withstand occasional washdowns.
Is the Airtac MF20-25 Stainless Steel Mini Cylinder MF20X125CM the Right Cylinder?
When sizing this 20 mm bore actuator, verify your force requirements carefully: the MF20X125CM provides 157 N of push at 0.5 MPa, but if your fixture needs more power, stepping up to the MF25 bore increases that output to 245.3 N. Since 20 mm is the smallest available MF bore, there is no smaller option in this family. The 125 mm stroke is well within the 500 mm standard limit, but at this extension you should monitor side loads to prevent rod bending. This unit features a CM round-end back cover, so ensure your mounting arrangement accommodates that profile.
Note that a standard double-acting cylinder drifts when air pressure is removed or the valve is centred, as the fixed TPU bumpers only soften the end-of-stroke impact and do not function as a braking mechanism. To suspend a load safely during an air loss event, install an external pilot-operated check valve or a dedicated rod lock. Additionally, because this model has no internal magnet, position sensing is not possible without switching to an -S variant.
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 MF20X125CM FAQ
This 20 mm bore cylinder features a 1/8" port and an M8x1.25 male rod thread. At 0.5 MPa it generates 157 N of push force and 131.9 N of pull force. At 0.7 MPa, the push increases to 219.8 N and the pull to 184.7 N. The theoretical maximum force is 32 kgf at 1.0 MPa.
No, because this specific SKU lacks the -S suffix, it does not have an internal piston magnet and cannot accept CMSG, DMSG, or EMSG switches. It features a CM round-end back cover and fixed TPU bumper pads that decelerate the stroke, but unlike the MFC variant, it does not offer adjustable air cushioning.
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