Airtac MSI Single Acting Stainless Steel Mini Cylinder MSI20X150U
The AirTAC Airtac MSI Single Acting Stainless Steel Mini Cylinder MSI20X150U is a genuine single acting, push (spring return) round-body mini air cylinder with a Ø20mm bore and 150mm 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
- Stroke150 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 MSI20X150U
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 and an internal spring to retract. Because it is single-acting, you only need one 1/8" air line, saving plumbing and ensuring the rod safely falls back to its retracted rest position if air pressure drops. The stainless barrel and rod resist mild corrosion and washdown environments.
With a 20 mm bore and an 8 mm rod, it yields a safe working load of about 72 N, making it suitable for clamping or vertically lifting around 6.1 kg with a 2:1 safety margin. This specific 150 mm travel length is non-standard and made-to-order, as single-acting springs are typically limited to 80 mm on this bore. It features a 90-degree U back cover and fixed TPU bumpers. Note this SKU lacks a magnet and cannot take CMSG/DMSG/EMSG sensors.
Airtac MSI Single Acting Stainless Steel Mini Cylinder MSI20X150U Technical Specifications
| Model | Airtac MSI Single Acting Stainless Steel Mini Cylinder MSI20X150U |
|---|---|
| Series | MSI ISO 6432 mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 150 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 MSI20X150U
| MSI | ISO 6432 round-body mini cylinder (single-acting push, spring-return). |
|---|---|
| 20 | Bore size in mm. |
| ×150 | 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 MSI20X150U Is Used
Extended Reach Ejection
Uses its 150 mm travel to push finished parts clear of a molding zone, relying on the 119.5 N push force to overcome mold release resistance.
Fail-Safe Package Gating
Acts as a normally closed gate on a conveyor. Air extends the rod to halt boxes, and a spring safely retracts the gate on air loss to keep lines moving.
Washdown Clamping
Secures lightweight stainless fixtures during food-grade washdown cycles, using its own stainless construction and 72 N safe working load to hold components.
Is the Airtac MSI Single Acting Stainless Steel Mini Cylinder MSI20X150U the Right Cylinder?
When sizing by push force, this Ø20 bore yields 119.5 N at 0.5 MPa. If you need less force, the Ø16 bore provides 74.9 N; if you require more, the Ø25 bore offers 190.3 N. Remember that at least 0.2 MPa of input pressure is mandatory to overcome the internal return spring before any extension occurs.
This unit features a 150 mm stroke, which exceeds the 80 mm standard spring limit, making it a non-standard, made-to-order part. It uses the ISO 6432 mounting interface for standard mini brackets and clevises. Because this specific SKU is not the -S variant, it cannot support position sensing.
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 MSI20X150U FAQ
This single-acting push cylinder generates 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 return spring. When air is released, the spring drives the rod back to its normally retracted rest state.
No, this specific SKU does not have a magnet and cannot accept CMSG, DMSG, or EMSG switches. You would need the -S variant for sensing. It is also a single-acting spring-return cylinder, not double-acting, and uses fixed TPU bumpers instead of adjustable air cushions.
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