Airtac MSI Single Acting Stainless Steel Mini Cylinder MSI20X55CA
The AirTAC Airtac MSI Single Acting Stainless Steel Mini Cylinder MSI20X55CA is a genuine single acting, push (spring return) round-body mini air cylinder with a Ø20mm bore and 55mm 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
- Stroke55 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 MSI20X55CA
Delivering a net push force of 119.5 N at 0.5 MPa, this stainless-steel round-body mini cylinder uses compressed air to extend a Ø8 mm rod and an internal spring to retract it. Because it is a single-acting PUSH type, you only need one 1/8" air line to operate it, saving plumbing and air consumption. The return spring also acts as a fail-safe, driving the rod back to its normally retracted rest state if air pressure drops. The Ø20 mm bore conforms to the ISO 6432 mounting interface, dropping directly into standard mini-cylinder brackets and clevises. Its riveted stainless barrel and rod resist mild corrosion and washdown environments. This specific SKU lacks a magnet and cannot host position sensors; adding an -S suffix enables CMSG, DMSG or EMSG switches. Fixed TPU bumper pads cushion the stroke ends without acting as a mid-stroke lock. For sizing, this bore yields a safe working load of roughly 72 N, or a vertical lift capacity of about 6.1 kg with a 2:1 safety margin.
Airtac MSI Single Acting Stainless Steel Mini Cylinder MSI20X55CA Technical Specifications
| Model | Airtac MSI Single Acting Stainless Steel Mini Cylinder MSI20X55CA |
|---|---|
| Series | MSI ISO 6432 mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 55 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 MSI20X55CA
| MSI | ISO 6432 round-body mini cylinder (single-acting push, spring-return). |
|---|---|
| 20 | Bore size in mm. |
| ×55 | 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 MSI20X55CA Is Used
Part Ejection
Uses the 119.5 N push stroke to positively eject stamped parts from a die, with the spring ensuring the ejector retracts clear on air loss.
Package Gating
Extends a physical stop gate to halt boxes on a line, then springs back to release them when the air supply is cut, maintaining a safe rest state.
Light Clamping
Provides reliable hold-down clamping for roughly 6 kg of vertical load, using the spring return to automatically release the clamp when air is removed.
Is the Airtac MSI Single Acting Stainless Steel Mini Cylinder MSI20X55CA the Right Cylinder?
When sizing by push force, this Ø20 mm bore provides 119.5 N at 0.5 MPa. If you need less force, the smaller Ø16 mm bore yields 74.9 N; if you require more, stepping up to the Ø25 mm bore provides 190.3 N. Remember that the internal return spring demands at least 0.2 MPa of supply pressure to overcome before the rod will extend. The 55 mm stroke falls safely within the 80 mm spring-limited standard travel for this bore size. This model features a CA rear pivot cover for clevis mounting, and because it has no -S magnet, it cannot accept magnetic sensors.
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 MSI20X55CA FAQ
This single-acting push cylinder generates 119.5 N of thrust 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 fails-safe to the retracted position.
No, this specific SKU does not include a magnet, so CMSG, DMSG or EMSG sensors cannot be used. You must select an -S variant for position sensing. It features a stainless-steel round-body build and a 1/8" port.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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