Airtac MI16-20 Stainless Steel Mini Cylinder MI20X40SU
The AirTAC Airtac MI16-20 Stainless Steel Mini Cylinder MI20X40SU is a genuine double acting round-body mini air cylinder with a Ø20mm bore and 40mm 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
- Stroke40 mm
- Port size1/8"
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionFixed TPU bumper pads
About the Airtac MI16-20 Stainless Steel Mini Cylinder MI20X40SU
Delivering 157 N of push force at 0.5 MPa, this double-acting stainless-steel round-body mini cylinder handles compact automation with ease. The Ø20 mm bore uses a 1/8" port and an M8x1.25 male rod thread, while the built-in magnet (-S) directly supports CMSG, DMSG, and EMSG position switches.
Its riveted stainless barrel and rod resist mild corrosion, outperforming painted alternatives in damp or washdown environments. The integrated U-style back cover provides a 90-degree mounting option for tight spaces. For practical sizing, plan for about 94 N of real work at 0.5 MPa, which means it can safely lift an 8 kg part vertically with a 2:1 safety margin.
Airtac MI16-20 Stainless Steel Mini Cylinder MI20X40SU Technical Specifications
| Model | Airtac MI16-20 Stainless Steel Mini Cylinder MI20X40SU |
|---|---|
| Series | MI ISO 6432 mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 40 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 MI20X40SU
| MI | ISO 6432 round-body mini cylinder (double-acting). |
|---|---|
| 20 | Bore size in mm. |
| ×40 | 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 MI20X40SU Is Used
Package Diverting Gate
Pushes lightweight cardboard cartons on a packaging line using its 157 N thrust and 40 mm stroke to actuate a routing flap.
Textile Loom Tensioner
Maintains yarn tension in a humid manufacturing environment, leveraging the stainless steel barrel to prevent mild corrosion.
Bin Lid Actuation
Opens and closes small parts bin lids vertically, safely managing an 8 kg lid weight with a 2:1 safety margin.
Is the Airtac MI16-20 Stainless Steel Mini Cylinder MI20X40SU the Right Cylinder?
When sizing this 40 mm stroke actuator, note the Ø16 bore provides 100.5 N push at 0.5 MPa, whereas the Ø25 offers 245.3 N, giving you clear scaling steps if your payload shifts. The fixed TPU bumper pads absorb stroke-end impact but do not function as an adjustable air cushion; for high-speed cycling, consider the MIC variable cushion variant.
Because a standard double-acting cylinder drifts when air pressure is lost or the valve is centered, you must add an external rod lock or pilot-operated check valve to suspend a vertical load safely. This SKU includes the piston magnet for sensors and the 90-degree U back cover, so you can mount it directly without an extra bracket.
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 MI20X40SU FAQ
This double-acting cylinder features a 1/8" port and generates 157 N push / 131.9 N pull at 0.5 MPa, and 219.8 N push / 184.7 N pull at 0.7 MPa. The theoretical maximum force is 32 kgf at 1.0 MPa.
No, it uses fixed TPU bumper pads to decelerate the stroke end, not an adjustable air cushion. It also does not hold position on air loss; the piston drifts, so an external rod lock or pilot check valve is required for suspended loads.
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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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