Airtac MSI Single Acting Stainless Steel Mini Cylinder MSI20X50SR
The AirTAC Airtac MSI Single Acting Stainless Steel Mini Cylinder MSI20X50SR is a genuine single acting, push (spring return) round-body mini air cylinder with a Ø20mm bore and 50mm 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
- Stroke50 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 MSI20X50SR
Delivering 119.5 N of push force at 0.5 MPa (182.3 N at 0.7 MPa), this stainless-steel round-body mini cylinder uses compressed air to extend a Ø8 mm rod while an internal spring handles the retraction. Because it is a single-acting push type, you only need one 1/8" air line, which reduces valve complexity and saves air. The return spring also acts as a fail-safe, driving the rod back to its normally retracted rest position if air pressure drops. Built with a riveted stainless barrel and rod, it resists mild corrosion and washdown environments. The -S suffix indicates a built-in piston magnet for position sensing, and the rear R cover provides an axial port orientation. For sizing, this bore yields a safe working load of roughly 72 N, or a vertical lift of about 6.1 kg with a 2:1 safety margin.
Operating pressure spans 0.2 to 1.0 MPa, though at least 0.2 MPa is required just to overcome the return spring before any useful work is done. Travel speed runs 50-800 mm/s, and fixed TPU bumper pads soften the stroke endpoints. The Ø20 mm bore adheres to the ISO 6432 mounting interface, dropping directly into standard mini brackets and clevises. Male M8x1.25 rod threads allow straightforward tooling attachment.
Airtac MSI Single Acting Stainless Steel Mini Cylinder MSI20X50SR Technical Specifications
| Model | Airtac MSI Single Acting Stainless Steel Mini Cylinder MSI20X50SR |
|---|---|
| Series | MSI ISO 6432 mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 50 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 MSI20X50SR
| MSI | ISO 6432 round-body mini cylinder (single-acting push, spring-return). |
|---|---|
| 20 | Bore size in mm. |
| ×50 | 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 MSI20X50SR Is Used
Light-Duty Clamping
Use the 119.5 N push force to secure light workpieces against a fixture, with the spring ensuring the clamp retracts safely on air loss.
Part Ejector
Extend the rod to push small components off a conveyor line, relying on the single-acting design to minimize plumbing and valve costs.
Bin Gating
Actuate a small hopper or bin gate where the fail-safe retracted rest position prevents accidental material flow during an air pressure drop.
Is the Airtac MSI Single Acting Stainless Steel Mini Cylinder MSI20X50SR the Right Cylinder?
When sizing by push force, this Ø20 bore provides 119.5 N at 0.5 MPa. If your application requires less force, stepping down to the Ø16 bore yields 74.9 N at the same pressure; if you need more push, the Ø25 bore offers 190.3 N. Remember that because the spring constantly opposes the rod, the cylinder will not extend at all below the 0.2 MPa minimum operating pressure. The 50 mm stroke sits well within the 80 mm standard spring-limited travel for this bore size. To add CMSG, DMSG, or EMSG position sensors, this -S variant already includes the necessary piston magnet. Mounting options include LB foot, FA flange, SDB pivot-block, and TC trunnion styles to fit your layout.
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 MSI20X50SR 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 of 0.2 MPa to overcome the internal spring and extend the rod; when air is released, the spring retracts the rod to its rest position.
The -S suffix means the cylinder has a built-in piston magnet for use with CMSG, DMSG, or EMSG electronic or reed switches. The single-acting push design uses air only to extend the rod, saving energy and requiring just one 1/8" port, while the stainless construction resists mild corrosion.
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