Airtac MSF Single Acting Mini Cylinder MSF25X50SU
The AirTAC Airtac MSF Single Acting Mini Cylinder MSF25X50SU is a genuine single acting, push (spring return) JIS-standard round-body mini air cylinder with a Ø25mm bore and 50mm 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
- Stroke50 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 MSF25X50SU
Delivering 192.8 N of push force at 0.5 MPa, this AirTAC MSF25X50SU mini cylinder uses compressed air to extend the rod and an internal spring to retract it. Because it is single-acting, you only need to plumb one 1/8 inch port, which simplifies valve requirements and ensures the rod fails to the 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 an equivalent ISO 6432 unit, saving valuable mounting length.
The quoted push force is already net of the return spring, meaning the full 290.9 N at 0.7 MPa is available for your work. For practical sizing, a safe working load is about 116 N, or roughly a 9.8 kg vertical lift with a 2:1 margin. This specific SKU includes a flat-end U back cover and a built-in piston magnet (-S) for position sensing.
Airtac MSF Single Acting Mini Cylinder MSF25X50SU Technical Specifications
| Model | Airtac MSF Single Acting Mini Cylinder MSF25X50SU |
|---|---|
| Series | MSF JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 50 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 MSF25X50SU
| MSF | JIS-standard round-body mini cylinder (single-acting push, spring-return). |
|---|---|
| 25 | Bore size in mm. |
| ×50 | 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 MSF25X50SU Is Used
Spring-Return Clamping
Provides 192.8 N of push force at 0.5 MPa to hold parts against a stop, with the internal spring safely retracting the rod when air is removed.
Package Ejector
Uses the 50 mm stroke to push light cartons off a belt, relying on single-acting simplicity to reduce valve complexity on the line.
Gravity Gate Actuator
Air extends the rod to open a discharge gate, while the spring ensures the mechanism fails closed during a pressure loss event.
Is the Airtac MSF Single Acting Mini Cylinder MSF25X50SU the Right Cylinder?
When sizing this 25 mm bore, check both ends of the range: if 192.8 N at 0.5 MPa is excessive, step down to the MSF20 which provides 117.5 N; if you need more thrust, the MSF32 offers 323.3 N. This single-acting spring-return design is ideal for clamping, ejecting, or gating tasks where the load must return to rest unpowered. Ensure your supply stays at or above the 0.2 MPa floor, otherwise the spring will overpower the air and prevent extension. Mounting options include LB foot, FA flange, SDB pivot, and TC trunnion, while the included magnet supports 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 0.2 – 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 MSF25X50SU FAQ
The push force is 192.8 N at 0.5 MPa and 290.9 N at 0.7 MPa. These figures are net of the return spring. The operating pressure range is 0.2 to 1.0 MPa; you must maintain at least 0.2 MPa to overcome the spring and extend the rod.
No. The MSF is a single-acting push cylinder, so the rod cannot be loaded in the retract direction. On air loss, the spring drives the rod to the fully retracted position but does not act as a brake for mid-stroke holding. For held mid-stroke loads, use a double-acting MF cylinder with an external rod lock.
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