Airtac MSF Single Acting Mini Cylinder MSF40X30U
The AirTAC Airtac MSF Single Acting Mini Cylinder MSF40X30U 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 MSF40X30U
Delivering a robust 535.3 N of push force at 0.5 MPa (786.5 N at 0.7 MPa), this 40 mm bore pneumatic mini cylinder is built for demanding clamping and ejection tasks. It uses compressed air to extend the 16 mm rod, while an internal spring handles the retraction. Because the spring constantly pulls the rod back, the quoted force is already net of that spring resistance, and the rod cannot be loaded in the return direction. The 1/4" port feeds the single air line required, simplifying your valve plumbing.
The SUS304 stainless steel barrel shrugs off mild corrosion and washdown environments, and the riveted aluminium covers create a JIS-standard round-body profile that is physically shorter than an ISO 6432 cylinder of the same bore and stroke. This specific configuration features a U flat-end rear cover and fixed TPU bumper pads to absorb end-of-stroke impacts. Without the -S magnet option, this SKU cannot accept position sensors; adding -S enables CMSG, DMSG, or EMSG switches. For practical sizing, expect a safe working load of roughly 321 N, or a vertical lift capacity of about 27.3 kg with a 2:1 safety margin.
Airtac MSF Single Acting Mini Cylinder MSF40X30U Technical Specifications
| Model | Airtac MSF Single Acting Mini Cylinder MSF40X30U |
|---|---|
| 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 MSF40X30U
| 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 MSF40X30U Is Used
Heavy-Duty Clamping
Apply 535.3 N of push force to hold heavy metal castings firmly in place during machining, relying on the spring to release the part automatically when air is cut.
Part Ejection
Push finished products off a conveyor belt with authority; the spring-return design ensures the ejector retracts cleanly out of the way after each cycle.
Pallet Gating
Actuate heavy diverter gates on a packaging line, using the robust 40 mm bore to move the mechanism and the U flat-end cover for simple direct mounting.
Is the Airtac MSF Single Acting Mini Cylinder MSF40X30U the Right Cylinder?
When sizing this 40 mm bore unit against the rest of the MSF family, stepping down to the MSF32 cuts the 0.5 MPa push force to 323.3 N, while the MSF40 represents the maximum thrust available in this series. This makes the MSF40X30U ideal when the MSF32 lacks the power to move your load but you still want the simplest possible piping. Single-acting spring-return cylinders excel in clamp, eject, and gate duties where the load must return to a safe retracted state upon air loss. Ensure your supply stays at or above the 0.2 MPa floor, otherwise the internal spring will overpower the air pressure and prevent extension. Mounting options include LB foot, FA flange, SDB pivot, and TC trunnion brackets to fit your frame, and remember this non-magnet SKU cannot host a sensor.
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 MSF40X30U FAQ
This single-acting 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; below that, the spring wins and the rod will not extend.
No, this specific SKU lacks the internal magnet, so it cannot host CMSG, DMSG, or EMSG switches. You would need the -S variant for position sensing. Additionally, on air loss, the spring drives the rod to the retracted position; it will not hold a mid-stroke load.
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