Airtac MSF Single Acting Mini Cylinder MSF40X50SCA
The AirTAC Airtac MSF Single Acting Mini Cylinder MSF40X50SCA 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 MSF40X50SCA
Delivering 535.3 N of push force at 0.5 MPa (786.5 N at 0.7 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 need to plumb one 1/4 inch port, simplifying valve requirements. The quoted force is already net of the return spring, yielding a safe working load of about 321 N or a 27.3 kg vertical lift with a 2:1 margin.
Built with a SUS304 stainless steel barrel and riveted aluminium covers, this JIS-standard round-body unit is shorter than a comparable ISO 6432 cylinder, saving valuable mounting length. The -S suffix provides a built-in magnet for CMSG, DMSG, or EMSG sensors, while the CA back cover adds a rear pivot. Deceleration is handled by fixed TPU bumper pads. You must maintain at least 0.2 MPa of air pressure to overcome the spring; below that, the spring wins and holds the rod retracted.
Airtac MSF Single Acting Mini Cylinder MSF40X50SCA Technical Specifications
| Model | Airtac MSF Single Acting Mini Cylinder MSF40X50SCA |
|---|---|
| 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 MSF40X50SCA
| 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 MSF40X50SCA Is Used
Heavy Part Ejection
Uses the full 535.3 N push at 0.5 MPa to positively eject dense machined metal components from a fixture, with the spring ensuring the arm clears the workspace when air is removed.
Pallet Stopping Gate
Acts as a robust 50 mm stroke pop-up stop for heavy pallets on a conveyor, relying on the 27.3 kg vertical lift capacity and the fail-safe retracted position to release flow on demand.
Secure Clamping Jig
Holds heavy workpieces securely during secondary machining operations, taking advantage of the 321 N safe working load and the rigid 16 mm rod threaded M14x1.5.
Is the Airtac MSF Single Acting Mini Cylinder MSF40X50SCA the Right Cylinder?
If 323.3 N from an MSF32 is insufficient for your clamp or ejector, this 40 mm bore is the maximum size available in the MSF family. It is ideal when you need a normally retracted actuator that safely returns to its rest position upon air loss. Remember that the spring prevents loading the rod in the retract direction, and the 0.2 MPa pressure floor must be met to function. Pair the CA pivot cover with appropriate mounting hardware, and select CMSG or DMSG switches to leverage the -S magnet for position confirmation.
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 MSF40X50SCA 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, with a maximum pressure of 1.0 MPa and a proof pressure of 1.5 MPa.
No, the internal spring drives the rod to the retracted position on air loss; it cannot hold an arbitrary mid-stroke load and acts as a fail-safe return, not a brake. For mid-stroke holding, use a double-acting MF cylinder with an external rod lock. This model includes a -S magnet for sensors and a CA rear pivot.
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