Airtac MSF Single Acting Mini Cylinder MSF40X75SU
The AirTAC Airtac MSF Single Acting Mini Cylinder MSF40X75SU is a genuine single acting, push (spring return) JIS-standard round-body mini air cylinder with a Ø40mm bore and 75mm 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
- Stroke75 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 MSF40X75SU
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 MSF40X75SU features a JIS-standard round-body construction with a SUS304 stainless barrel and riveted aluminium covers, offering a shorter mounting envelope than an ISO 6432 unit of the same size while resisting mild washdown corrosion. It includes a U flat-end rear cover and a built-in magnet (-S) for position sensing.
The quoted thrust is already net of the return spring, meaning that force is what you actually get at the rod. As a practical buyer insight, sizing for a safe working load of roughly 321 N (about 60% of the 0.5 MPa figure) ensures longevity, or it can vertically lift around 27.3 kg with a 2:1 safety margin. End-of-stroke deceleration is handled by fixed TPU bumper pads rather than an adjustable cushion. Note that the rod cannot be loaded in the retract direction.
Airtac MSF Single Acting Mini Cylinder MSF40X75SU Technical Specifications
| Model | Airtac MSF Single Acting Mini Cylinder MSF40X75SU |
|---|---|
| Series | MSF JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 75 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 MSF40X75SU
| MSF | JIS-standard round-body mini cylinder (single-acting push, spring-return). |
|---|---|
| 40 | Bore size in mm. |
| ×75 | 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 MSF40X75SU Is Used
Heavy Duty Clamping
Provides positive 535.3 N clamping pressure at 0.5 MPa to secure heavy workpieces during machining, automatically releasing on air loss.
Part Ejection
Uses the 75 mm stroke to push finished components off a conveyor line, with the internal spring ensuring the ejector retracts clear of the belt.
Divertor Gate
Actuates sorting gates on packaging lines; the spring-return failsafe moves the gate to the retracted rest position if compressed air drops out.
Is the Airtac MSF Single Acting Mini Cylinder MSF40X75SU the Right Cylinder?
When sizing this 40 mm bore unit, consider the application's downward force needs: if 535.3 N at 0.5 MPa is excessive, step down to the MSF32 which provides 323.3 N. As 40 mm is the largest available MSF bore, exceeding this thrust requires migrating to a different cylinder family. This single-acting spring-return design is ideal for clamping, ejecting, or gating tasks where the tool must safely return to the start position upon air loss. Ensure your supply meets the 0.2 MPa minimum operating pressure required to overcome the spring. For mounting flexibility, pair the U cover with LB foot, FA flange, SDB pivot, or TC trunnion brackets, and utilise CMSG, DMSG, or EMSG switches with the included -S magnet.
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 MSF40X75SU FAQ
This single-acting cylinder 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 internal return spring. It requires a minimum operating pressure of 0.2 MPa to overcome the spring and extend the rod, with a maximum pressure of 1.0 MPa.
No, the internal spring drives the rod back to the fully retracted position on air loss, so it cannot hold an arbitrary mid-stroke load. For position holding you would need a double-acting MF cylinder with an external rod lock. The -S magnet on this unit allows CMSG, DMSG, or EMSG sensors to track end-of-stroke positions.
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