Airtac MSF Single Acting Mini Cylinder MSF40X25SCA
The AirTAC Airtac MSF Single Acting Mini Cylinder MSF40X25SCA is a genuine single acting, push (spring return) JIS-standard round-body mini air cylinder with a Ø40mm bore and 25mm stroke, 1/4" 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.
- BoreØ40 mm
- Stroke25 mm
- Port size1/4"
- Acting typeSingle acting, push (spring return)
- Rod threadM14×1.5
- CushionFixed TPU bumper pads
About the Airtac MSF Single Acting Mini Cylinder MSF40X25SCA
Delivering 535.3 N of push at 0.5 MPa (786.5 N at 0.7 MPa), this 40 mm bore single-acting cylinder uses compressed air to extend the rod and an internal spring to retract it. Because it is single-acting, you only pipe and valve the single 1/4" port, and it fails to the retracted position on air loss. The SUS304 stainless steel round barrel resists mild corrosion and washdown environments. Riveted aluminium covers keep the JIS-standard body shorter than a comparable ISO 6432 unit.
The quoted forces are already net of the return spring, which requires a 0.2 MPa minimum pressure to overcome. For practical sizing, a safe working load is about 321 N (roughly 60% of the 0.5 MPa rating). This specific configuration includes a built-in magnet (-S) for CMSG, DMSG, or EMSG position sensing, and a CA rear pivot cover. Fixed TPU bumper pads absorb end-of-stroke impact across the 50-800 mm/s speed range.
Airtac MSF Single Acting Mini Cylinder MSF40X25SCA Technical Specifications
| Model | Airtac MSF Single Acting Mini Cylinder MSF40X25SCA |
|---|---|
| Series | MSF JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 mm |
| Acting type | Single acting, push (spring return) |
| Port size | 1/4" |
| Rod thread | M14×1.5 |
| 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 (Ø40mm)
| Pressure | Push force (spring return) |
|---|---|
| 0.5 MPa | 535.3 N |
| 0.7 MPa | 786.5 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 MSF40X25SCA
| MSF | JIS-standard round-body mini cylinder (single-acting push, spring-return). |
|---|---|
| 40 | Bore size in mm. |
| ×25 | 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 MSF40X25SCA Is Used
Heavy Part Ejection
Uses the 535.3 N push force to positively eject dense machined metal parts from a fixture, with the spring safely pulling the rod back when air is removed.
Package Diverting Gate
Extends a 25 mm stroke to deflect heavy cartons on a conveyor line, relying on the spring return to clear the path during jams or air pressure loss.
Pallet Stop Arm
Acts as a robust stop for incoming pallets, using the 1/4" ported 40 mm bore to push the stop arm up before snapping back to rest via the internal spring.
Is the Airtac MSF Single Acting Mini Cylinder MSF40X25SCA the Right Cylinder?
When sizing this 40 mm bore, step down to the MSF32 if your job only needs 323.3 N of push at 0.5 MPa, as 40 mm is the largest available MSF bore. Choose this single-acting spring-return model for clamping, ejecting, or gating tasks where the load must return to a safe start position on air loss. Remember the 0.2 MPa pressure floor; below that, the spring wins and the rod will not extend. The CA rear pivot pairs with LB foot, FA flange, SDB pivot, or TC trunnion mounts, and the -S magnet enables electronic or reed switch tracking.
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 MSF40X25SCA FAQ
The 40 mm bore provides a net push force of 535.3 N at 0.5 MPa and 786.5 N at 0.7 MPa. Because it is spring-return, it requires a minimum operating pressure of 0.2 MPa to overcome the internal spring and extend the rod.
No. On air loss, the internal spring drives the rod back to its fully retracted rest position. It cannot hold an arbitrary mid-stroke load. For mid-stroke holding, use a double-acting MF cylinder with an external rod lock. The -S magnet allows CMSG/DMSG/EMSG sensors to track its position.
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