Airtac MSI Single Acting Stainless Steel Mini Cylinder MSI20X30SR
The AirTAC Airtac MSI Single Acting Stainless Steel Mini Cylinder MSI20X30SR is a genuine single acting, push (spring return) round-body mini air cylinder with a Ø20mm bore and 30mm stroke, 1/8" air ports and a stainless-steel barrel and rod for mildly corrosive environments. Its ISO 6432 mounting interface makes it a compact drop-in for standard mini-cylinder fixtures.
- BoreØ20 mm
- Stroke30 mm
- Port size1/8"
- Acting typeSingle acting, push (spring return)
- Rod threadM8×1.25
- CushionFixed TPU bumper pads
About the Airtac MSI Single Acting Stainless Steel Mini Cylinder MSI20X30SR
Delivering 119.5 N of push force at 0.5 MPa, this AirTAC round-body mini cylinder uses compressed air to extend the rod and an internal spring to retract it. Because it is a single-acting PUSH type, you only need one 1/8" air line, saving plumbing and air consumption. The internal return spring acts as a fail-safe, driving the rod back to its normally retracted rest state if air pressure drops. Built with a stainless-steel barrel and piston rod, it resists mild corrosion and washdown environments. This -S variant includes a piston magnet for position sensing.
The Ø20 mm bore yields a practical safe working load of roughly 72 N, making it suitable for clamping or vertically lifting about 6 kg with a 2:1 safety margin. It conforms to the ISO 6432 mounting interface, dropping easily into standard mini brackets and clevises. Fixed TPU bumper pads soften the stroke ends, though they do not lock the load. Note that a minimum of 0.2 MPa is required to overcome the return spring before extension begins.
Airtac MSI Single Acting Stainless Steel Mini Cylinder MSI20X30SR Technical Specifications
| Model | Airtac MSI Single Acting Stainless Steel Mini Cylinder MSI20X30SR |
|---|---|
| Series | MSI ISO 6432 mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 30 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 500 mm |
Specifications follow the official AirTAC MI/MIC (ISO 6432) datasheet. Barrel & rod: stainless steel (round-body, riveted construction). Thread options: PT (blank) / G.
Theoretical Output Force (Ø20mm)
| Pressure | Push force (spring return) |
|---|---|
| 0.5 MPa | 119.5 N |
| 0.7 MPa | 182.3 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 MSI Single Acting Stainless Steel Mini Cylinder MSI20X30SR
| MSI | ISO 6432 round-body mini cylinder (single-acting push, spring-return). |
|---|---|
| 20 | Bore size in mm. |
| ×30 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSG / DMSG / EMSG sensors. |
MI-family variants: MI / MIC (double acting ±cushion), MSI / MTI (single acting push / pull), MID / MICD (double rod ±cushion), MIJ / MICJ (adjustable stroke ±cushion). Back covers CA / U / R / CM. Mounting LB / FA / SDB / TC.
Where the Airtac MSI Single Acting Stainless Steel Mini Cylinder MSI20X30SR Is Used
Part Ejection
Use the 119.5 N extend thrust to positively eject machined parts from a fixture, with the spring ensuring a safe retracted clearance when air is removed.
Light Clamping
Provides a reliable 72 N safe working load for holding light components during assembly, returning automatically to a clear rest position on air loss.
Flow Gating
Acts as a spring-return pin-stop or diverter gate on a conveyor line, needing only a single 1/8" air line to operate the extend stroke.
Is the Airtac MSI Single Acting Stainless Steel Mini Cylinder MSI20X30SR the Right Cylinder?
When sizing by push force, this 119.5 N (at 0.5 MPa) model sits between the Ø16 bore at 74.9 N and the Ø25 bore at 190.3 N. Choose this Ø20 if the smaller bore lacks the thrust to overcome friction but you want to avoid the bulk of the larger unit. Remember the system needs at least 0.2 MPa of supply pressure to beat the internal spring; below that, the rod will not extend. The 30 mm stroke is well within the 80 mm spring-limited standard for this bore.
Mounting options include LB foot, FA flange, SDB pivot-block, and TC trunnion, alongside an R axial-in rear cover port orientation. Because this SKU carries the -S suffix, it is fully equipped for CMSG, DMSG, or EMSG sensors. A non-magnetized SKU cannot accept switches.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G)
- ✓ Magnet (-S) for sensors?
- ✓ Back cover (CA/U/R/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/R/CM) & mount (LB/FA/SDB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac MSI Single Acting Stainless Steel Mini Cylinder MSI20X30SR FAQ
It provides a push force of 119.5 N at 0.5 MPa and 182.3 N at 0.7 MPa. It requires a minimum operating pressure of 0.2 MPa to overcome the internal return spring; when air is released, the spring drives the rod to the retracted rest position.
Yes. The -S suffix denotes a built-in piston magnet, allowing you to mount CMSG, DMSG, or EMSG switches for stroke detection. Non-S SKUs lack this magnet and cannot accept sensors.
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