Airtac MSF Single Acting Mini Cylinder MSF40X50SU
The AirTAC Airtac MSF Single Acting Mini Cylinder MSF40X50SU is a genuine single acting, push (spring return) JIS-standard round-body mini air cylinder with a Ø40mm bore and 50mm 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
- Stroke50 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 MSF40X50SU
Delivering 535.3 N of push force at 0.5 MPa (786.5 N at 0.7 MPa), this AirTAC MSF40X50SU is a JIS-standard round-body mini cylinder built for single-acting operation. Air extends the 16 mm rod through a 1/4" port, while an internal spring handles the return. This means you only plumb one air line, and the cylinder fails safely to the retracted position on air loss. 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 40 mm bore and 50 mm stroke, this body is notably shorter than an ISO 6432 cylinder, saving valuable mounting length. It uses fixed TPU bumper pads for end-of-stroke deceleration. With a safe working load around 321 N, it can vertically lift approximately 27.3 kg with a 2:1 safety margin.
Airtac MSF Single Acting Mini Cylinder MSF40X50SU Technical Specifications
| Model | Airtac MSF Single Acting Mini Cylinder MSF40X50SU |
|---|---|
| Series | MSF JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 50 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 MSF40X50SU
| MSF | JIS-standard round-body mini cylinder (single-acting push, spring-return). |
|---|---|
| 40 | Bore size in mm. |
| ×50 | 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 MSF40X50SU Is Used
Heavy-Duty Clamping
Use the 535.3 N push output to secure heavy metal castings during machining, relying on the spring return to automatically release the part when air is cut.
Vertical Ejection
Eject dense finished parts from a press bed, utilizing the safe working load of roughly 321 N to positively push components clear of the tooling.
Pneumatic Gating
Actuate heavy diverter gates on a packaging line where the 40 mm bore provides enough force to overcome flap friction and product weight without sticking.
Is the Airtac MSF Single Acting Mini Cylinder MSF40X50SU the Right Cylinder?
When sizing this 40 mm bore, compare it directly against the MSF32, which provides 323.3 N of push at 0.5 MPa. If your application requires more than the 535.3 N offered here, note that 40 mm is the largest bore available in the MSF series. You must maintain at least 0.2 MPa operating pressure to overcome the return spring. This U flat-end rear cover model includes the -S magnet, allowing you to mount CMSG, DMSG, or EMSG sensors for position detection. Mounting options include LB foot, FA flange, SDB pivot, and TC trunnion.
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 MSF40X50SU FAQ
This single-acting cylinder generates 535.3 N of push force 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, the spring constantly drives the rod to the retracted rest position on air loss and cannot act as a controllable brake. For holding a mid-stroke load, use a double-acting MF cylinder with an external rod lock. The -S magnet on this unit allows CMSG/DMSG/EMSG sensors to confirm end positions.
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