Airtac MSF Single Acting Mini Cylinder MSF25X40SCA
The AirTAC Airtac MSF Single Acting Mini Cylinder MSF25X40SCA 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 MSF25X40SCA
Delivering 192.8 N of push force at 0.5 MPa, this AirTAC MSF25X40SCA mini cylinder uses compressed air to extend the rod and an internal spring to retract it. Because it is single-acting, you only plumb one 1/8 inch port, which simplifies valve requirements and ensures the cylinder defaults to a safe retracted position on air loss. The SUS304 stainless round body and riveted aluminium covers form a compact JIS-standard assembly that is physically shorter than a comparable ISO 6432 unit.
The quoted push force is already net of the return spring, meaning the full 192.8 N is available for work, provided your supply stays above the 0.2 MPa floor required to overcome that spring. For practical sizing, a safe working load is roughly 116 N, or a vertical lift of about 9.8 kg with a 2:1 margin. This -S variant includes a piston magnet for position sensing, and the rear CA pivot cover allows direct angular mounting.
Airtac MSF Single Acting Mini Cylinder MSF25X40SCA Technical Specifications
| Model | Airtac MSF Single Acting Mini Cylinder MSF25X40SCA |
|---|---|
| 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 MSF25X40SCA
| 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 MSF25X40SCA Is Used
Spring-Return Clamping
Uses the 192.8 N push output to hold parts securely during machining, automatically releasing to the retracted state if air pressure drops.
Package Ejector
Extends rapidly to push light cartons off a belt, relying on the internal spring for a consistent return without needing a secondary air line.
Pivot Gate Actuator
Leverages the CA rear pivot to swing a diverter gate, using the 40 mm stroke to route items with a fail-safe retracted position.
Is the Airtac MSF Single Acting Mini Cylinder MSF25X40SCA the Right Cylinder?
When sizing this 25 mm bore, compare it both ways: the smaller MSF20 provides 117.5 N at 0.5 MPa, while the larger MSF32 yields 323.3 N at 0.5 MPa. Choose this model when you need moderate push force for spring-return tasks like clamping or ejecting, keeping in mind the 0.2 MPa minimum operating pressure. The built-in -S magnet supports CMSG, DMSG, or EMSG switches, and the CA pivot back cover pairs well with SDB pivot-block mounting.
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 MSF25X40SCA 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, the force is net of the internal spring, and it requires a minimum operating pressure of 0.2 MPa to overcome that spring. The maximum pressure is 1.0 MPa.
No. On air loss, the spring drives the rod to the retracted position; it cannot hold an arbitrary mid-stroke load. For mid-stroke holding, use a double-acting MF cylinder with an external rod lock. This -S model does support CMSG, DMSG, and EMSG sensors.
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