Airtac MF20-25 Stainless Steel Mini Cylinder MF20X115CM
The AirTAC Airtac MF20-25 Stainless Steel Mini Cylinder MF20X115CM is a genuine double acting JIS-standard round-body mini air cylinder with a Ø20mm bore and 115mm 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
- Stroke115 mm
- Port size1/8"
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionFixed TPU bumper pads
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MF20-25 Stainless Steel Mini Cylinder MF20X115CM
Delivering 157 N of push force at 0.5 MPa, the AirTAC MF20X115CM is a double-acting JIS-standard round-body mini cylinder built for tight fixtures. Because its SUS304 stainless barrel and riveted aluminium covers form a shorter overall body than an ISO 6432 cylinder of the same bore and stroke, it directly saves mounting length. The piston relies on a heterogeneous two-way seal that retains an oil film for long life, while fixed TPU bumper pads and a front-cover anti-impact pad soften the stroke-end impact.
This 20 mm bore unit features an 8 mm rod, an M8x1.25 male thread, and a 1/8" port. For practical sizing, 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. The CM round-end back cover simplifies rear pivot mounting. Note that this specific SKU lacks a magnet, so it cannot accept CMSG, DMSG, or EMSG position switches without upgrading to the -S variant.
Airtac MF20-25 Stainless Steel Mini Cylinder MF20X115CM Technical Specifications
| Model | Airtac MF20-25 Stainless Steel Mini Cylinder MF20X115CM |
|---|---|
| Series | MF JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 115 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 MF20X115CM
| MF | JIS-standard round-body mini cylinder (double-acting). |
|---|---|
| 20 | Bore size in mm. |
| ×115 | 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 MF20X115CM Is Used
Small Parts Ejection
Uses the 157 N push force at 0.5 MPa to eject small moulded plastic components from a fixture, with the 115 mm stroke providing adequate clearance for robotic pickup.
Light Diverting Gate
Actuates a lightweight routing flap on a packaging conveyor, where the compact JIS body length saves valuable space along the narrow transfer frame.
Clamp Actuation
Secures thin sheet metal during a light stamping operation, relying on the riveted SUS304 stainless construction to withstand occasional mild washdown.
Is the Airtac MF20-25 Stainless Steel Mini Cylinder MF20X115CM the Right Cylinder?
When sizing this 20 mm bore actuator, compare it directly with the next size up: the MF25 delivers 245.3 N of push force at 0.5 MPa, offering a significant step up if your fixture stalls. Since 20 mm is the smallest available MF bore, there is no smaller standard option to drop down to. The 115 mm stroke is well within the 500 mm standard limit, but at this extension you should watch for side-loading and rod-bending forces to prevent premature seal wear.
Keep in mind that a standard double-acting cylinder like this drifts when air pressure is lost or the valve is centred—the fixed bumpers only decelerate the stroke end and act as neither a brake nor a holding lock. If your application requires the load to stay put during an air failure, you must add an external rod lock or a pilot-operated check valve. Furthermore, because this SKU has no internal magnet, position sensing is impossible unless you specify the -S magnet version for CMSG, DMSG, or EMSG switches.
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 MF20X115CM FAQ
This 20 mm bore cylinder features a 1/8" port and an 8 mm rod with an M8x1.25 male thread. The double-acting thrust is 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.
This specific SKU lacks the internal magnet required for CMSG, DMSG, or EMSG switches; you must purchase the -S variant for position sensing. The CM back cover provides a rounded pivot end for rear clevis mounting, and the fixed TPU bumper pads merely soften the stroke end rather than acting as an adjustable air cushion.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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