Airtac MSF Single Acting Mini Cylinder MSF40X80SU
The AirTAC Airtac MSF Single Acting Mini Cylinder MSF40X80SU is a genuine single acting, push (spring return) JIS-standard round-body mini air cylinder with a Ø40mm bore and 80mm 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
- Stroke80 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 MSF40X80SU
Delivering 535.3 N of push force at 0.5 MPa (786.5 N at 0.7 MPa), this MSF40X80SU is the largest bore in the AirTAC mini cylinder family. It is a single-acting, push-type, spring-return actuator: compressed air entering the 1/4" port extends the 16 mm rod, while an internal spring retracts it when air is released. Because the force is already net of the spring, you can safely plan on a working load of about 321 N or a vertical lift of roughly 27.3 kg with a 2:1 margin.
Built as a JIS-standard round-body unit, the SUS304 stainless steel barrel and riveted aluminium covers resist mild corrosion and washdown environments. For the same 40 mm bore and 80 mm stroke, this body is noticeably shorter than an ISO 6432 cylinder, saving valuable mounting length. The U flat-end back cover simplifies direct rear mounting, and the built-in magnet (-S) enables position sensing with CMSG, DMSG or EMSG switches.
Airtac MSF Single Acting Mini Cylinder MSF40X80SU Technical Specifications
| Model | Airtac MSF Single Acting Mini Cylinder MSF40X80SU |
|---|---|
| Series | MSF JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 80 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 MSF40X80SU
| MSF | JIS-standard round-body mini cylinder (single-acting push, spring-return). |
|---|---|
| 40 | Bore size in mm. |
| ×80 | 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 MSF40X80SU Is Used
Heavy Part Ejection
Uses the 535.3 N push force to positively eject finished metal or plastic parts from a mold, relying on the spring to safely retract the 16 mm rod between cycles.
Package Sorting Gate
Diverts heavier cartons on a conveyor line; the single-acting spring return ensures the gate snaps back to the resting position if compressed air is lost.
Pallet Clamping
Holds pallets or workpieces in place during light machining, taking advantage of the 27.3 kg vertical lift capacity with a 2:1 safety margin.
Is the Airtac MSF Single Acting Mini Cylinder MSF40X80SU the Right Cylinder?
When sizing this 40 mm bore, check both directions: if 535.3 N at 0.5 MPa is excessive, step down to the MSF32 which provides 323.3 N; if you need more force, there is no larger MSF bore available. This single-acting design is ideal for simple clamping, ejecting, or gating tasks where the spring automatically retracts the rod on air loss. Remember the working pressure floor is 0.2 MPa—below that, the return spring overcomes the air pressure and the cylinder will not extend. Mounting options include LB foot, FA flange, SDB pivot, and TC trunnion brackets to suit your layout.
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 MSF40X80SU FAQ
It generates 535.3 N of push force at 0.5 MPa and 786.5 N at 0.7 MPa. The operating pressure range is 0.2 to 1.0 MPa. You must maintain at least 0.2 MPa to overcome the internal return spring; below that floor, the spring wins and the rod will not extend.
No, the spring drives the rod to the retracted position on air loss, so it cannot hold an arbitrary mid-stroke load. For a held mid-stroke load, use a double-acting MF cylinder with an external rod lock. This MSF40X80SU includes a magnet (-S) for CMSG/DMSG/EMSG sensors and uses fixed TPU bumper pads for end-of-stroke deceleration.
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