Airtac MSF Single Acting Mini Cylinder MSF40X30SU
The AirTAC Airtac MSF Single Acting Mini Cylinder MSF40X30SU is a genuine single acting, push (spring return) JIS-standard round-body mini air cylinder with a Ø40mm bore and 30mm 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
- Stroke30 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 MSF40X30SU
Delivering 535.3 N of push force at 0.5 MPa, this 40 mm bore 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 1/4 inch port, which simplifies valve requirements. The quoted force is already net of the return spring. The SUS304 stainless round body and riveted aluminium covers yield a shorter mounting envelope than an ISO 6432 unit of identical size, while resisting mild washdown corrosion.
This MSF40X30SU variant includes a piston magnet for position sensing and features a U flat-end rear cover. With a 16 mm rod and M14x1.5 male thread, it safely handles a working load of about 321 N. It drives the rod to the retracted position on air loss, so it cannot hold a mid-stroke load without a double-acting MF and external rod lock.
Airtac MSF Single Acting Mini Cylinder MSF40X30SU Technical Specifications
| Model | Airtac MSF Single Acting Mini Cylinder MSF40X30SU |
|---|---|
| Series | MSF JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 30 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 MSF40X30SU
| MSF | JIS-standard round-body mini cylinder (single-acting push, spring-return). |
|---|---|
| 40 | Bore size in mm. |
| ×30 | 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 MSF40X30SU Is Used
Heavy Part Ejection
Uses the full 535.3 N push force to positively eject dense molded parts from a fixture, with the spring ensuring the rod retracts clear on air release.
Secure Clamping
Clamps heavy workpieces holding about 32 kg with a 2:1 safety margin, relying on the single air line to maintain pressure during machining.
Gate Actuation
Actuates heavy diverter gates on packaging lines, where the spring-return design guarantees the gate closes safely if the air supply drops.
Is the Airtac MSF Single Acting Mini Cylinder MSF40X30SU the Right Cylinder?
Choose this 40 mm bore when you need maximum push capacity in the MSF range. If 535.3 N at 0.5 MPa is excessive, step down to the MSF32 which provides 323.3 N. Since 40 mm is the largest available bore, heavier duties require a different cylinder family. Maintain at least 0.2 MPa operating pressure to overcome the return spring. Mounting options include LB foot, FA flange, SDB pivot, and TC trunnion. The built-in magnet enables 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 MSF40X30SU FAQ
It generates 535.3 N of push force at 0.5 MPa and 786.5 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 and extend the rod.
No. On air loss the spring drives the rod to the fully retracted position. It cannot hold an arbitrary mid-stroke load. For position holding you need a double-acting MF cylinder with an external rod lock. This unit has a U flat-end cover and a -S magnet for CMSG/DMSG/EMSG sensors.
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