Airtac MI16-20 Stainless Steel Mini Cylinder MI20X325SU
The AirTAC Airtac MI16-20 Stainless Steel Mini Cylinder MI20X325SU is a genuine double acting round-body mini air cylinder with a Ø20mm bore and 325mm 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
- Stroke325 mm
- Port size1/8"
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionFixed TPU bumper pads
About the Airtac MI16-20 Stainless Steel Mini Cylinder MI20X325SU
Delivering 157 N of push force at 0.5 MPa, this AirTAC MI20X325SU actuator is a double-acting round-body mini cylinder built from a stainless-steel barrel and rod. The riveted construction shrinks the footprint while resisting mild corrosion, making it highly suitable for damp production zones where painted steel would degrade. A built-in piston magnet (-S) enables direct mounting of CMSG, DMSG or EMSG reed and electronic switches for precise end-of-stroke detection.
With a 325 mm stroke, the Ø8 mm rod extends well past standard miniature ranges, so keeping the load guided is critical to prevent rod bending. The 1/8" port feeds air to both chambers for symmetrical thrust, while fixed TPU bumper pads absorb the impact at stroke extremes. For real-world sizing, plan for roughly 94 N of usable work at 0.5 MPa; vertically, it lifts about 8 kg safely with a 2:1 margin.
Airtac MI16-20 Stainless Steel Mini Cylinder MI20X325SU Technical Specifications
| Model | Airtac MI16-20 Stainless Steel Mini Cylinder MI20X325SU |
|---|---|
| Series | MI ISO 6432 mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 325 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 MI20X325SU
| MI | ISO 6432 round-body mini cylinder (double-acting). |
|---|---|
| 20 | Bore size in mm. |
| ×325 | 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 MI20X325SU Is Used
Bottle Sorting Diverter
Pushes lightweight plastic containers at 157 N on a packaging line, using the 325 mm stroke to reach across a 300 mm conveyor belt.
Textile Loom Tensioner
Handles yarn guide arms in humid textile facilities, where the stainless-steel rod prevents rust from ambient moisture and lint.
Carton Flap Folder
Extends to fold corrugated cardboard flaps on a packing station, relying on the U cover to keep the 1/8" air line tucked away from moving parts.
Is the Airtac MI16-20 Stainless Steel Mini Cylinder MI20X325SU the Right Cylinder?
When sizing this 20 mm bore, compare its 157 N push at 0.5 MPa against the smaller Ø16 bore (100.5 N) or the larger Ø25 bore (245.3 N) to match your exact payload. The U-style back cover provides a 90-degree port orientation, which helps route hoses cleanly in tight machine cells, and standard LB foot or TC trunnion brackets fit the ISO 6432 mounting interface. Because the 325 mm stroke creates a long lever arm, external guide rails are strongly recommended to counter side-load forces and protect the piston rod.
Note that venting the air or centering the directional valve causes the piston to drift, as the TPU bumpers only decelerate the stroke end rather than locking the load. To suspend a vertical weight safely in a power-off state, install an external pilot-operated check valve or a dedicated rod lock.
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 MI20X325SU FAQ
This 20 mm bore cylinder has a 1/8" port and an M8x1.25 male rod thread. It generates 157 N push and 131.9 N pull at 0.5 MPa, 219.8 N push and 184.7 N pull at 0.7 MPa, with a theoretical maximum force of 32 kgf at 1.0 MPa.
No, the fixed TPU bumper pads only decelerate the piston at the stroke end and do not act as a brake. If air is lost or the valve is centered, the rod will drift; a pilot check valve or external rod lock is required to hold a vertical load.
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