Airtac MSF Single Acting Mini Cylinder MSF40X20SCM
The AirTAC Airtac MSF Single Acting Mini Cylinder MSF40X20SCM is a genuine single acting, push (spring return) JIS-standard round-body mini air cylinder with a Ø40mm bore and 20mm 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
- Stroke20 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 MSF40X20SCM
Generating a substantial 535.3 N of push force at 0.5 MPa, this AirTAC MSF40X20SCM mini cylinder is built for robust single-acting operations. As a push-type, spring-return actuator, air extends the 16 mm rod through the 1/4" port, while an internal spring ensures it retracts automatically when air is removed. This means you only need to plumb and valve one port, and the cylinder fails safely to its retracted position on air loss. The quoted force is already net of the return spring, which requires a minimum 0.2 MPa operating pressure to overcome.
The JIS-standard round-body construction utilizes a SUS304 stainless steel barrel and riveted aluminium covers, offering excellent mild corrosion and washdown resistance. For the same 40 mm bore and 20 mm stroke, this riveted design is notably shorter than an ISO 6432 cylinder, saving valuable mounting length. It features fixed TPU bumper pads for end-of-stroke deceleration rather than an adjustable air cushion. This specific configuration includes a built-in piston magnet (-S) for position sensing and a CM round-end rear cover. Based on the 0.5 MPa push rating, a safe working load is approximately 321 N, or a vertical lift of about 27.3 kg with a 2:1 margin.
Airtac MSF Single Acting Mini Cylinder MSF40X20SCM Technical Specifications
| Model | Airtac MSF Single Acting Mini Cylinder MSF40X20SCM |
|---|---|
| Series | MSF JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 20 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 MSF40X20SCM
| MSF | JIS-standard round-body mini cylinder (single-acting push, spring-return). |
|---|---|
| 40 | Bore size in mm. |
| ×20 | 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 MSF40X20SCM Is Used
Heavy-Duty Clamping
Delivers 535.3 N of push force at 0.5 MPa to secure heavy workpieces during machining, releasing automatically via spring return on air loss.
Part Ejection
Uses the robust 16 mm rod to thrust finished components off a conveyor line, relying on the spring to retract quickly for the next cycle.
Divertor Gate
Actuates heavy sorting gates with a safe working load near 321 N, ensuring the gate closes to a fail-safe retracted position when the air supply stops.
Is the Airtac MSF Single Acting Mini Cylinder MSF40X20SCM the Right Cylinder?
When sizing this 40 mm bore actuator, compare its 535.3 N @0.5 MPa output against the next size down: the MSF32 delivers 323.3 N @0.5 MPa, which may be insufficient for heavier ejection tasks. Since 40 mm is the largest available MSF bore, moving beyond 535.3 N requires a different cylinder family. Single-acting spring-return cylinders excel in clamping, ejecting, and gating applications where the load must default to the retracted position. Ensure your air supply stays at or above the 0.2 MPa floor; below this threshold, the internal spring wins and the rod will not extend fully. Mounting options include LB foot, FA flange, SDB pivot, and TC trunnion brackets, and the included -S magnet supports CMSG, DMSG, or EMSG switches.
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 MSF40X20SCM FAQ
The 40 mm bore generates a net push force of 535.3 N at 0.5 MPa and 786.5 N at 0.7 MPa. Because it is single-acting with a return spring, it requires a minimum operating pressure of 0.2 MPa to extend the rod.
No. The internal spring drives the rod to the fully retracted rest position on air loss; it cannot hold an arbitrary mid-stroke load. For mid-stroke holding, use a double-acting MF cylinder with an external rod lock.
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