Airtac MSF Single Acting Mini Cylinder MSF20X80SU
The AirTAC Airtac MSF Single Acting Mini Cylinder MSF20X80SU is a genuine single acting, push (spring return) JIS-standard round-body mini air cylinder with a Ø20mm bore and 80mm 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
- Stroke80 mm
- Port size1/8"
- Acting typeSingle acting, push (spring return)
- Rod threadM8×1.25
- CushionFixed TPU bumper pads
About the Airtac MSF Single Acting Mini Cylinder MSF20X80SU
Delivering a net push of 117.5 N at 0.5 MPa, this 20 mm bore single-acting cylinder uses air to extend the rod and an internal spring to retract it. Because you only pipe one 1/8" port, plumbing is simpler and the rod fails to the retracted position on air loss. The 80 mm stroke is governed by fixed TPU bumper pads rather than an adjustable cushion.
Built as a JIS-standard round-body mini with a SUS304 stainless barrel and riveted aluminium covers, the unit is shorter than an ISO 6432 cylinder for the same envelope. The -S suffix adds a piston magnet for CMSG, DMSG or EMSG switches, while the U flat-end rear cover suits tight mounting layouts. Factoring a 2:1 margin, expect a safe vertical lift of about 6 kg.
Airtac MSF Single Acting Mini Cylinder MSF20X80SU Technical Specifications
| Model | Airtac MSF Single Acting Mini Cylinder MSF20X80SU |
|---|---|
| Series | MSF JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 80 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 MSF20X80SU
| MSF | JIS-standard round-body mini cylinder (single-acting push, spring-return). |
|---|---|
| 20 | 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 MSF20X80SU Is Used
Light-Duty Clamping
Pushes parts against a stop with 117.5 N of force at 0.5 MPa, releasing instantly when air is removed and the spring retracts.
Package Ejector
Extends 80 mm to knock light cartons off a belt, relying on the spring return to reset without needing a second air line.
Vertical Lift Gate
Raises a 6 kg flap or diverter with a 2:1 safety margin, defaulting safely to the closed position on pressure loss.
Is the Airtac MSF Single Acting Mini Cylinder MSF20X80SU the Right Cylinder?
Size both ways before committing: this 20 mm bore yields 117.5 N at 0.5 MPa, whereas stepping up to the MSF25 provides 192.8 N. There is no smaller MSF bore, so for lighter duties a different family is required. Keep the supply at or above the 0.2 MPa floor so air pressure reliably beats the return spring. Match your fixings via LB foot, FA flange, SDB pivot or TC trunnion options, and confirm the -S magnet if you need position sensing.
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 MSF20X80SU FAQ
It generates a net push of 117.5 N at 0.5 MPa and 181.3 N at 0.7 MPa. You must supply at least 0.2 MPa for the air to overcome the internal return spring; below that the spring wins.
No. On air loss the spring drives the rod to the retracted rest position, so it cannot hold an arbitrary mid-stroke load. For that you need a double-acting MF with an external rod lock. The -S magnet allows CMSG, DMSG or EMSG sensors for end-of-stroke detection.
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