Airtac MSF Single Acting Mini Cylinder MSF40X15SU
The AirTAC Airtac MSF Single Acting Mini Cylinder MSF40X15SU is a genuine single acting, push (spring return) JIS-standard round-body mini air cylinder with a Ø40mm bore and 15mm 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
- Stroke15 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 MSF40X15SU
Delivering a robust 535.3 N of push force at 0.5 MPa, this AirTAC MSF40X15SU mini cylinder is built for JIS-standard round-body applications needing a short 15 mm stroke. As a single-acting push type, compressed air entering the 1/4" port extends the Ø16 mm rod, while an internal spring handles the return. This means you only plumb one air line, and the cylinder safely defaults to its retracted position if air pressure drops. The quoted force is already net of the spring resistance.
The riveted SUS304 stainless barrel and aluminium covers resist mild corrosion and washdown environments. For the same bore and stroke, this JIS body is notably shorter than an ISO 6432 cylinder, saving valuable mounting space. This specific unit includes the -S piston magnet for position sensing and a U flat-end rear cover. In practical terms, it provides a safe working load of roughly 321 N, or can vertically lift about 27.3 kg with a 2:1 safety margin.
Airtac MSF Single Acting Mini Cylinder MSF40X15SU Technical Specifications
| Model | Airtac MSF Single Acting Mini Cylinder MSF40X15SU |
|---|---|
| Series | MSF JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 15 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 MSF40X15SU
| MSF | JIS-standard round-body mini cylinder (single-acting push, spring-return). |
|---|---|
| 40 | Bore size in mm. |
| ×15 | 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 MSF40X15SU Is Used
Heavy-Duty Parts Clamping
Use the 535.3 N push output to securely hold heavy metal castings during machining. The spring return automatically releases the part if the air supply is interrupted.
Package Ejector Gate
With a short 15 mm stroke, quickly push cartons off a conveyor line. The single-acting design simplifies valve requirements to just one 1/4" air line.
Vertical Lift Stop
Lift or hold workpieces up to 27.3 kg with a 2:1 safety margin. The fail-safe retracted rest position prevents uncontrolled drops on air loss.
Is the Airtac MSF Single Acting Mini Cylinder MSF40X15SU the Right Cylinder?
When sizing this 40 mm bore, compare its 535.3 N @0.5 MPa output against the next size down: the MSF32 offers 323.3 N @0.5 MPa. Since 40 mm is the largest available MSF bore, moving up in force requires switching to a different cylinder family. This single-acting spring-return design is ideal for clamping, ejecting, or gating tasks where the load must not be driven on the return stroke. Remember the 0.2 MPa pressure floor; below this, the internal spring overcomes the air pressure and forces the rod back to rest. Mounting options include LB foot, FA flange, SDB pivot, and TC trunnion, while the built-in -S magnet supports CMSG, DMSG, and 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 MSF40X15SU FAQ
This 40 mm bore cylinder provides a net push force of 535.3 N at 0.5 MPa and 786.5 N at 0.7 MPa. It requires a minimum operating pressure of 0.2 MPa to overcome the internal return spring, with a maximum pressure of 1.0 MPa.
No. On air loss, the spring drives the rod to the 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. This unit includes a -S magnet for CMSG/DMSG/EMSG sensors and a U flat-end cover.
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