Airtac MSF Single Acting Mini Cylinder MSF40X40U
The AirTAC Airtac MSF Single Acting Mini Cylinder MSF40X40U is a genuine single acting, push (spring return) JIS-standard round-body mini air cylinder with a Ø40mm bore and 40mm 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
- Stroke40 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 MSF40X40U
Delivering 535.3 N of push force at 0.5 MPa (786.5 N at 0.7 MPa), this AirTAC MSF40X40U is a JIS-standard round-body mini cylinder built for single-acting push operation. Air extends the Ø16 mm rod through a 1/4" port, while an internal spring retracts it when air is released. The riveted SUS304 stainless barrel and aluminium covers resist mild corrosion and washdown environments. Because you only pipe one port, plumbing is simpler and the cylinder fails to the retracted position on air loss. The quoted push force is already net of the spring, which requires a 0.2 MPa pressure floor to overcome. For this 40 mm bore, a practical safe working load is about 321 N, or roughly a 27.3 kg vertical lift with a 2:1 margin. The U flat-end back cover suits flush mounting against a surface. This SKU lacks a magnet and cannot accept position sensors; adding the -S option enables CMSG, DMSG, or EMSG switches.
Unlike adjustable-cushion models, end-of-stroke deceleration relies on fixed TPU bumper pads, keeping the envelope compact. In fact, for the same bore and stroke, this JIS body is shorter than an ISO 6432 cylinder, saving valuable mounting length without conforming to that standard. It is not a tie-rod or profile cylinder, and the spring cannot hold a mid-stroke load or act as a brake.
Airtac MSF Single Acting Mini Cylinder MSF40X40U Technical Specifications
| Model | Airtac MSF Single Acting Mini Cylinder MSF40X40U |
|---|---|
| Series | MSF JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 40 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 MSF40X40U
| MSF | JIS-standard round-body mini cylinder (single-acting push, spring-return). |
|---|---|
| 40 | Bore size in mm. |
| ×40 | 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 MSF40X40U Is Used
Heavy-Duty Clamping
Exerts 535.3 N at 0.5 MPa to secure heavy workpieces during machining, releasing automatically to the retracted position on air loss.
Part Ejection
Pushes finished products off a line with a 40 mm stroke, using the internal spring to safely withdraw the rod between cycles.
Diversion Gate
Acts as a robust diverter on packaging conveyors, holding about 27.3 kg against gravity with a 2:1 margin before springing back.
Is the Airtac MSF Single Acting Mini Cylinder MSF40X40U the Right Cylinder?
Choose this 40 mm bore if you need substantial clamping or ejecting force; it yields 535.3 N at 0.5 MPa. If your load is lighter, step down to the MSF32, which provides 323.3 N at 0.5 MPa. As this is the largest available MSF bore, there is no larger size in the series. Single-acting push cylinders suit applications that must return to a safe retracted state on air loss, like gating or clamping. Ensure your supply meets the 0.2 MPa minimum to overcome the return spring. Mounting options include LB foot, FA flange, SDB pivot, and TC trunnion. Remember that this specific SKU has no magnet, so it cannot use sensors; select an -S variant if you need 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 MSF40X40U FAQ
It generates 535.3 N of push force at 0.5 MPa and 786.5 N at 0.7 MPa. These figures are net of the return spring. Operating pressure must be 0.2 to 1.0 MPa, as a minimum of 0.2 MPa is required to overcome the spring.
No, this SKU does not include a magnet and cannot accept position switches. You must choose the -S variant to use CMSG, DMSG, or EMSG sensors. The internal spring retracts the rod on air loss but cannot hold a mid-stroke load.
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