Airtac MSF Single Acting Mini Cylinder MSF40X150U
The AirTAC Airtac MSF Single Acting Mini Cylinder MSF40X150U 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 MSF40X150U
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 inch port, simplifying valve requirements. The 150 mm stroke represents the maximum standard length for the MSF series, and the U flat-end rear cover provides a flush mounting back. As a JIS-standard round-body unit, the riveted SUS304 stainless barrel and aluminium covers yield a shorter overall body than an ISO 6432 cylinder for the same footprint, while resisting mild washdown corrosion.
The quoted push figures are already net of the return spring, meaning you get that full force at the rod end. For a practical setup, expect a safe working load of about 321 N, or a vertical lift capacity near 27.3 kg with a 2:1 safety margin. This base SKU lacks a magnet, so it cannot accept CMSG, DMSG, or EMSG position switches; you must specify the -S option for sensing. Deceleration relies on fixed TPU bumper pads rather than an adjustable air cushion.
Airtac MSF Single Acting Mini Cylinder MSF40X150U Technical Specifications
| Model | Airtac MSF Single Acting Mini Cylinder MSF40X150U |
|---|---|
| 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 MSF40X150U
| 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 MSF40X150U Is Used
Heavy Part Ejection
Uses the full 535.3 N extension force to push heavy machined parts out of a fixture, with the spring safely pulling the rod back when air is cut.
Vertical Lift Gates
Raises light material handling gates weighing up to 27.3 kg with a 2:1 margin, relying on gravity and the internal spring to close them on air loss.
Fail-Safe Clamping
Secures workpieces during machining; the single-acting design ensures the clamp retracts automatically if the air supply drops.
Is the Airtac MSF Single Acting Mini Cylinder MSF40X150U the Right Cylinder?
If 321 N of safe working load is excessive for your fixture, step down to the MSF32, which provides 323.3 N at 0.5 MPa. The MSF40 sits at the top of the range, so no larger bore exists within this mini cylinder family. Single-acting push types excel in clamping, ejecting, and gating tasks where the load must return to a safe retracted position 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, but remember this specific unit has no magnet for sensors.
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 MSF40X150U 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 between 0.2 and 1.0 MPa; below 0.2 MPa the spring wins and the rod will not extend.
No, this specific SKU does not include a magnet, so CMSG, DMSG, or EMSG switches cannot be used. You would need the -S variant for sensing. Also, the fixed TPU bumper pads handle end-of-stroke damping without adjustable air cushions.
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