Airtac MF20-25 Stainless Steel Mini Cylinder MF20X100U
The AirTAC Airtac MF20-25 Stainless Steel Mini Cylinder MF20X100U is a genuine double acting JIS-standard round-body mini air cylinder with a Ø20mm bore and 100mm 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
- Stroke100 mm
- Port size1/8"
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionFixed TPU bumper pads
About the Airtac MF20-25 Stainless Steel Mini Cylinder MF20X100U
Generating 157 N of push force at 0.5 MPa, this double-acting AirTAC mini cylinder features a 20 mm bore and 100 mm stroke. Its JIS-standard round-body construction 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 operational life.
Equipped with a U flat-end back cover, the unit uses fixed TPU bumper pads to soften stroke-end impacts rather than providing adjustable cushioning. Because this specific SKU lacks the -S magnet option, it cannot accept CMSG, DMSG, or EMSG position sensors. For practical actuation at 0.5 MPa, plan for roughly 94 N of usable work, which equates to safely lifting about an 8 kg load vertically.
Airtac MF20-25 Stainless Steel Mini Cylinder MF20X100U Technical Specifications
| Model | Airtac MF20-25 Stainless Steel Mini Cylinder MF20X100U |
|---|---|
| Series | MF JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 100 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 MF20X100U
| MF | JIS-standard round-body mini cylinder (double-acting). |
|---|---|
| 20 | Bore size in mm. |
| ×100 | 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 MF20X100U Is Used
Small Parts Ejection
Ideal for pushing lightweight plastic or aluminium components out of a CNC machining centre, utilising the 157 N push force to reliably clear the work zone.
Package Diverting
Deploys a 100 mm stroke to actuate a routing flap on a compact packaging line, redirecting small cartons without consuming excessive frame length.
Clamp Actuation
Secures delicate electronic housings during an ultrasonic welding process, providing enough hold without crushing the component.
Is the Airtac MF20-25 Stainless Steel Mini Cylinder MF20X100U the Right Cylinder?
When sizing this 20 mm bore actuator, consider the adjacent MF25 model if your application requires more force, as it delivers 245.3 N at 0.5 MPa. Since 20 mm is the smallest available bore in the MF series, dropping down further is not an option. The 1/8" port and M8x1.25 male rod thread suit standard pneumatic plumbing and fittings.
Keep in mind that a standard double-acting cylinder drifts if air pressure is lost or the valve is centred, as the bumpers only decelerate the stroke end and do not function as a locking brake. To suspend a load securely, integrate an external rod lock or a pilot-operated check valve into your circuit. Additionally, the 100 mm stroke demands attention to side loading, so ensure proper rod alignment to prevent premature seal wear and rod bending.
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 MF20X100U 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.
No, because this specific SKU does not include the -S magnet, it cannot accept CMSG, DMSG, or EMSG magnetic switches. You would need the -S variant for sensing. The unit features a U flat-end back cover and fixed TPU bumper pads that decelerate the piston at stroke ends.
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