Airtac MI8~12 Stainless Steel Mini Cylinder MI8X20U
The AirTAC Airtac MI8~12 Stainless Steel Mini Cylinder MI8X20U is a genuine double acting round-body mini air cylinder with a Ø8mm bore and 20mm stroke, M5×0.8 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.
- BoreØ8 mm
- Stroke20 mm
- Port sizeM5×0.8
- Acting typeDouble acting
- Rod threadM4×0.7
- CushionFixed TPU bumper pads
About the Airtac MI8~12 Stainless Steel Mini Cylinder MI8X20U
Delivering 25.1 N of push force at 0.5 MPa, this double-acting stainless-steel mini cylinder handles light-duty positioning in tight spaces. The riveted round-body construction pairs a corrosion-resistant barrel and rod with a 90-degree U rear cover, making it highly suitable for damp or washdown environments where painted steel would degrade. It features an M5x0.8 air port and an M4x0.7 male rod thread.
Because the bore is Ø8, it conforms to ISO 6432 mounting dimensions, dropping directly into standard mini-cylinder brackets and clevises for easy design integration. Fixed TPU bumper pads absorb the impact at stroke end to protect the mechanism. For practical sizing, plan for a safe working load of about 15 N, which means it can vertically lift roughly 1.3 kg with a 2:1 safety margin.
Airtac MI8~12 Stainless Steel Mini Cylinder MI8X20U Technical Specifications
| Model | Airtac MI8~12 Stainless Steel Mini Cylinder MI8X20U |
|---|---|
| Series | MI ISO 6432 mini cylinder |
| Bore size | Ø8 mm |
| Stroke | 20 mm |
| Acting type | Double acting |
| Port size | M5×0.8 |
| Rod thread | M4×0.7 |
| 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 150 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 (Ø8mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 25 N | 19 N |
| 0.7 MPa | 35 N | 26 N |
| Max (@1.0 MPa) | 5 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac MI8~12 Stainless Steel Mini Cylinder MI8X20U
| MI | ISO 6432 round-body mini cylinder (double-acting). |
|---|---|
| 8 | Bore size in mm. |
| ×20 | 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 MI8~12 Stainless Steel Mini Cylinder MI8X20U Is Used
Micro-Clamp Actuation
Drives small pneumatic grippers on electronics assembly lines, providing the 25.1 N push needed to hold delicate PCBs without crushing components.
Lab Dispenser Routing
Shifts lightweight reagent tubes on automated diagnostic equipment, leveraging the stainless steel construction to withstand frequent chemical wipe-downs.
Small Part Ejection
Pushes tiny plastic moulded parts out of a machining fixture using the 20 mm stroke, relying on the fixed TPU bumpers to prevent end-of-stroke bounce.
Is the Airtac MI8~12 Stainless Steel Mini Cylinder MI8X20U the Right Cylinder?
If your task requires less force than the 25.1 N provided here at 0.5 MPa, the MI series does not offer a smaller bore, so you would need to look at reducing your operating pressure or evaluating a different product family entirely. Stepping up to the Ø10 bore increases the push force to 39.3 N at 0.5 MPa if this 8 mm option stalls under load. This specific SKU lacks the -S magnet, so it cannot accept CMSG, DMSG or EMSG position sensors; choose an -S variant if you require electronic stroke confirmation.
The U-style back cover provides a 90-degree mounting interface for compact spatial constraints. Remember that a standard cylinder drifts when air pressure is lost or the valve is centred, as the TPU pads only decelerate the stroke end rather than locking the rod. To suspend a load safely mid-stroke, 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 MI8~12 Stainless Steel Mini Cylinder MI8X20U FAQ
At 0.5 MPa it provides 25.1 N push and 18.8 N pull. At 0.7 MPa it provides 35.2 N push and 26.4 N pull. The theoretical maximum force is 5.1 kgf at 1.0 MPa. The air port is M5x0.8 and the male rod thread is M4x0.7.
Yes, the Ø8 bore uses the ISO 6432 mounting interface, so it fits standard mini-cylinder clevises and brackets. However, because this specific SKU lacks the -S magnet, it cannot accept CMSG, DMSG or EMSG magnetic switches; you must select an -S variant for position sensing.
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