Airtac MSF Single Acting Mini Cylinder MSF25X40U
The AirTAC Airtac MSF Single Acting Mini Cylinder MSF25X40U is a genuine single acting, push (spring return) JIS-standard round-body mini air cylinder with a Ø25mm bore and 40mm 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.
- BoreØ25 mm
- Stroke40 mm
- Port size1/8"
- Acting typeSingle acting, push (spring return)
- Rod threadM10×1.25
- CushionFixed TPU bumper pads
About the Airtac MSF Single Acting Mini Cylinder MSF25X40U
Delivering 192.8 N of push force at 0.5 MPa, this AirTAC MSF25X40U is a JIS-standard round-body mini cylinder built for single-acting operation. Air extends the 10 mm rod out by 40 mm, while an internal spring handles the return, meaning you only need to plumb a single 1/8" port. The quoted force is already net of the spring, and the SUS304 stainless barrel shrinks mounting length compared to an ISO 6432 unit while resisting mild washdown.
Because the spring constantly fights the air pressure, the working floor is 0.2 MPa—below that the spring wins and the rod stays retracted. This non-magnet SKU cannot host a sensor, but the rear U flat-end cover gives a clean, flush mount against a machine frame. Factoring a 2:1 margin, expect a safe vertical lift of about 9.8 kg.
Airtac MSF Single Acting Mini Cylinder MSF25X40U Technical Specifications
| Model | Airtac MSF Single Acting Mini Cylinder MSF25X40U |
|---|---|
| Series | MSF JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 40 mm |
| Acting type | Single acting, push (spring return) |
| Port size | 1/8" |
| Rod thread | M10×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.2 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 50 – 800 mm/s |
| Cushion | Fixed TPU bumper pads |
| Max standard stroke | Up to 150 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 (Ø25mm)
| Pressure | Push force (spring return) |
|---|---|
| 0.5 MPa | 192.8 N |
| 0.7 MPa | 290.9 N |
Single-acting push: air extends the rod; the return spring retracts it. Forces already net the spring; minimum working pressure is 0.2 MPa.
Model Code: Airtac MSF Single Acting Mini Cylinder MSF25X40U
| MSF | JIS-standard round-body mini cylinder (single-acting push, spring-return). |
|---|---|
| 25 | Bore size in mm. |
| ×40 | 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 MSF Single Acting Mini Cylinder MSF25X40U Is Used
Part Ejection
Uses the 192.8 N push stroke to kick machined parts off a conveyor before retracting clear.
Light Clamping
Holds a 9.8 kg workpiece against a stop; the spring safely retracts the clamp if air drops.
Flap Gating
Extends 40 mm to divert packages on a belt, relying on the U cover for a flush rear mount.
Is the Airtac MSF Single Acting Mini Cylinder MSF25X40U the Right Cylinder?
When sizing this 25 mm bore, check both ends of the range: step down to the MSF20 for 117.5 N @0.5 MPa, or step up to the MSF32 for 323.3 N @0.5 MPa if this unit stalls. The single-acting spring-return design fits clamping or ejecting tasks that must fail safe to the retracted position on air loss. Just ensure your supply clears the 0.2 MPa floor to overcome the spring, and note that without the -S magnet option, CMSG/DMSG/EMSG switches cannot be fitted.
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 0.2 – 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 MSF Single Acting Mini Cylinder MSF25X40U FAQ
It generates 192.8 N of push force at 0.5 MPa and 290.9 N at 0.7 MPa. Because it is single-acting with a spring return, it requires a minimum operating pressure of 0.2 MPa to overcome the internal spring, with a maximum of 1.0 MPa.
No, this specific SKU lacks the internal magnet, so CMSG, DMSG, or EMSG switches cannot be used. You would need the -S variant for sensing. It also uses fixed TPU bumper pads rather than an adjustable cushion, and the spring drives it to the retracted position on air loss rather than holding a mid-stroke load.
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