Airtac MSF Single Acting Mini Cylinder MSF20X40SCA
The AirTAC Airtac MSF Single Acting Mini Cylinder MSF20X40SCA is a genuine single acting, push (spring return) JIS-standard round-body mini air cylinder with a Ø20mm bore and 40mm stroke, 1/8" 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.
- BoreØ20 mm
- Stroke40 mm
- Port size1/8"
- Acting typeSingle acting, push (spring return)
- Rod threadM8×1.25
- CushionFixed TPU bumper pads
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MSF Single Acting Mini Cylinder MSF20X40SCA
Generating 117.5 N of push force at 0.5 MPa, this AirTAC MSF20X40SCA mini cylinder uses compressed air to extend the rod and an internal spring to retract it. Because it is single-acting, you only plumb one 1/8" port, simplifying valve requirements. The SUS304 stainless round-body and riveted aluminium covers form a compact JIS-standard assembly that is physically shorter than a comparable ISO 6432 unit, saving valuable machine space.
The quoted output is already net of the return spring, meaning it delivers true usable thrust. For practical sizing, expect a safe working load of roughly 71 N, or a vertical lift capacity of about 6 kg with a 2:1 safety margin. Fitted with a CA rear pivot, it handles end-of-stroke impacts using fixed TPU bumper pads. The built-in -S magnet supports CMSG, DMSG, or EMSG position sensing.
Airtac MSF Single Acting Mini Cylinder MSF20X40SCA Technical Specifications
| Model | Airtac MSF Single Acting Mini Cylinder MSF20X40SCA |
|---|---|
| Series | MSF JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 40 mm |
| Acting type | Single acting, push (spring return) |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| 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 (Ø20mm)
| Pressure | Push force (spring return) |
|---|---|
| 0.5 MPa | 117.5 N |
| 0.7 MPa | 181.3 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 MSF20X40SCA
| MSF | JIS-standard round-body mini cylinder (single-acting push, spring-return). |
|---|---|
| 20 | Bore size in mm. |
| ×40 | 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 MSF20X40SCA Is Used
Small Part Clamping
Provides 71 N of safe clamping pressure to hold light plastic or aluminium components during machining, releasing automatically on air loss.
Package Ejector
Pushes small cartons off a belt line with a 40 mm stroke, relying on the internal spring to retract cleanly before the next item arrives.
Diverter Gate
Actuates a lightweight routing flap on a sorter; the single 1/8" port keeps pneumatic wiring minimal and the SUS304 body resists washdown.
Is the Airtac MSF Single Acting Mini Cylinder MSF20X40SCA the Right Cylinder?
When sizing this 20 mm bore unit, compare its 117.5 N @0.5 MPa thrust against the next size up: the MSF25 delivers 192.8 N @0.5 MPa if your clamp or ejector needs more power. As the smallest available MSF bore, there is no smaller option for lighter duties. Ensure your supply stays at or above the 0.2 MPa floor, otherwise the internal spring will overpower the air and prevent extension.
This model includes a CA pivot back cover for clevis mounting and an -S magnet for electronic or reed switches. It is ideal for spring-return gating, ejection, and clamping where air loss safely retracts the load. For applications requiring mid-stroke holding, select a double-acting MF cylinder with an external rod lock instead.
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 MSF20X40SCA FAQ
It delivers a net push force of 117.5 N at 0.5 MPa and 181.3 N at 0.7 MPa. Because it is single-acting with a spring return, you must supply at least 0.2 MPa of air pressure to overcome the spring and extend the rod.
No, the spring drives the rod back to the retracted position on air loss; it cannot hold an arbitrary mid-stroke load. The -S magnet allows CMSG/DMSG/EMSG sensors to track end positions, and the fixed TPU bumpers absorb end impacts.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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