Airtac MI16-20 Stainless Steel Mini Cylinder MI20X125SU
The AirTAC Airtac MI16-20 Stainless Steel Mini Cylinder MI20X125SU is a genuine double acting round-body mini air cylinder with a Ø20mm bore and 125mm 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
- Stroke125 mm
- Port size1/8"
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionFixed TPU bumper pads
About the Airtac MI16-20 Stainless Steel Mini Cylinder MI20X125SU
Generating 157 N of push force at 0.5 MPa, this double-acting stainless-steel round-body mini cylinder handles a 125 mm stroke with a Ø8 mm piston rod. The riveted barrel and rod shrug off mild corrosion, giving it a real edge over painted alternatives in damp production zones. Because the bore falls within the Ø8-Ø25 range, it uses the ISO 6432 mounting interface, dropping smoothly into standard mini-cylinder brackets and clevises for easy design swaps.
The built-in piston magnet (-S) supports CMSG, DMSG and EMSG switches for position sensing, while the U-type back cover provides a 90-degree port and mounting orientation for tight spaces. Fixed TPU bumper pads decelerate the impact at stroke ends. Plan for roughly 94 N of actual work at 0.5 MPa, which means it can safely lift about 8 kg vertically when applying a 2:1 safety margin to the part weight.
Airtac MI16-20 Stainless Steel Mini Cylinder MI20X125SU Technical Specifications
| Model | Airtac MI16-20 Stainless Steel Mini Cylinder MI20X125SU |
|---|---|
| Series | MI ISO 6432 mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 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 | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | 185 N |
| Max (@1.0 MPa) | 32 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac MI16-20 Stainless Steel Mini Cylinder MI20X125SU
| MI | ISO 6432 round-body mini cylinder (double-acting). |
|---|---|
| 20 | Bore size in mm. |
| ×125 | 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 MI16-20 Stainless Steel Mini Cylinder MI20X125SU Is Used
Package Diverter Gate
Pushes lightweight cardboard cartons on a packaging line using 157 N of thrust, with the U cover mounted flush to the conveyor frame.
Lab Sample Ejection
Ejects processed fluid samples from a testing carousel, leveraging the stainless-steel body to withstand mild chemical splashes.
Tote Positioning Stop
Acts as a 125 mm stroke stopper pin for plastic totes, safely arresting an 8 kg load using the integrated TPU bumper pads.
Is the Airtac MI16-20 Stainless Steel Mini Cylinder MI20X125SU the Right Cylinder?
When sizing this 20 mm bore, stepping down to the Ø16 variant lowers the output to 100.5 N push at 0.5 MPa, whereas moving up to the Ø25 bore raises it to 245.3 N. The 125 mm stroke is well within the 500 mm maximum standard stroke, keeping the unit as a readily available catalogue item. For a 125 mm extension, ensure your guiding structure handles side loads to prevent rod bending, as the piston rod is only Ø8 mm.
The U-type rear cover simplifies 90-degree mounting, but remember that a plain double-acting cylinder drifts when air is lost or the valve is centered. The TPU bumpers only soften the stroke end and do not function as a lock or brake. To suspend a load safely mid-stroke, fit an external rod lock or a pilot-operated check valve.
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 0.15 – 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 MI16-20 Stainless Steel Mini Cylinder MI20X125SU FAQ
The 1/8 inch port feeds a 20 mm bore that generates 157 N push and 131.9 N pull at 0.5 MPa. At 0.7 MPa it yields 219.8 N push and 184.7 N pull, with a theoretical maximum of 32 kgf at 1.0 MPa.
Yes, the -S suffix denotes a built-in magnet compatible with CMSG, DMSG and EMSG switches. The U-type back cover provides a 90-degree mounting interface and port orientation, conforming to ISO 6432 mounting dimensions for easy bracket integration.
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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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