Airtac MSF Single Acting Mini Cylinder MSF40X150SU
The AirTAC Airtac MSF Single Acting Mini Cylinder MSF40X150SU is a genuine single acting, push (spring return) JIS-standard round-body mini air cylinder with a Ø40mm bore and 150mm 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
- Stroke150 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 MSF40X150SU
Delivering 535.3 N of push force at 0.5 MPa (786.5 N at 0.7 MPa), this 40 mm bore pneumatic mini cylinder uses air to extend the rod and an internal spring to retract it. Because it is single-acting, you only plumb one 1/4" port, simplifying valve requirements. The quoted force is already net of the return spring, and the rod cannot be loaded on the return stroke. A built-in piston magnet (-S) enables position sensing with CMSG, DMSG, or EMSG switches, while the U flat-end rear cover provides a flush rear mounting face.
Built with a SUS304 stainless steel round barrel and riveted aluminium covers, the JIS-standard body is shorter than an ISO 6432 cylinder for the same 150 mm stroke, saving valuable machine space. The fixed TPU bumper pads absorb end-of-stroke impacts across the 50-800 mm/s speed range. For sizing, this yields a safe working load of about 321 N, meaning it can vertically lift or clamp roughly 27.3 kg with a 2:1 safety margin.
Airtac MSF Single Acting Mini Cylinder MSF40X150SU Technical Specifications
| Model | Airtac MSF Single Acting Mini Cylinder MSF40X150SU |
|---|---|
| Series | MSF JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 150 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 MSF40X150SU
| MSF | JIS-standard round-body mini cylinder (single-acting push, spring-return). |
|---|---|
| 40 | Bore size in mm. |
| ×150 | 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 MSF40X150SU Is Used
Heavy Duty Clamping
Exerts up to 786.5 N of push force at 0.7 MPa to secure heavy metal workpieces during machining, releasing automatically on air loss.
Part Ejection
Uses the full 150 mm stroke to push finished components off a conveyor belt, with the spring safely retracting the rod between cycles.
Pallet Gating
Acts as a robust stop gate for heavy pallets, holding approximately 27.3 kg vertically with a 2:1 safety margin before springing back.
Is the Airtac MSF Single Acting Mini Cylinder MSF40X150SU the Right Cylinder?
When sizing this 40 mm bore model, compare its 535.3 N @0.5 MPa output against the next size down: the MSF32 provides 323.3 N @0.5 MPa, making this MSF40 the correct choice when the smaller bore lacks sufficient clamping or ejecting power. As 40 mm is the largest available MSF bore, you cannot step up further within this series. Ensure your air supply stays at or above the 0.2 MPa floor; below this pressure the internal spring will overpower the air and prevent extension. Mounting options include LB foot, FA flange, SDB pivot, and TC trunnion brackets, and the included -S magnet allows seamless sensor integration.
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 MSF40X150SU 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 an operating pressure between 0.2 and 1.0 MPa; the 0.2 MPa minimum is required to overcome the internal return spring. The 1/4" port supplies air to extend the rod.
If air pressure drops below 0.2 MPa or is removed entirely, the internal spring drives the rod to the fully retracted rest position. It cannot hold a load mid-stroke; for mid-stroke holding you need a double-acting MF cylinder with an external rod lock. The -S magnet allows tracking this retracted position with CMSG or DMSG switches.
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