Airtac MI8~12 Stainless Steel Mini Cylinder MI12X55SU
The AirTAC Airtac MI8~12 Stainless Steel Mini Cylinder MI12X55SU is a genuine double acting round-body mini air cylinder with a Ø12mm bore and 55mm 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.
- BoreØ12 mm
- Stroke55 mm
- Port sizeM5×0.8
- Acting typeDouble acting
- Rod threadM6×1.0
- CushionFixed TPU bumper pads
About the Airtac MI8~12 Stainless Steel Mini Cylinder MI12X55SU
Generating 56.5 N of push force at 0.5 MPa, this double-acting stainless-steel round-body mini cylinder handles light-duty positioning with ease. The Ø12 mm bore features an M5x0.8 port and a 55 mm stroke, while the built-in magnet (-S) supports CMSG, DMSG, and EMSG switches for precise end-of-stroke detection.
Its riveted stainless barrel and rod naturally resist mild corrosion, outperforming painted alternatives in damp environments. The U-style rear cover provides a 90-degree mounting interface that simplifies compact machine integration. For practical sizing, plan for a safe working load of about 34 N, which means it can reliably lift a 2.9 kg part vertically with a 2:1 safety margin.
Airtac MI8~12 Stainless Steel Mini Cylinder MI12X55SU Technical Specifications
| Model | Airtac MI8~12 Stainless Steel Mini Cylinder MI12X55SU |
|---|---|
| Series | MI ISO 6432 mini cylinder |
| Bore size | Ø12 mm |
| Stroke | 55 mm |
| Acting type | Double acting |
| Port size | M5×0.8 |
| Rod thread | M6×1.0 |
| 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 250 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 (Ø12mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 57 N | 42 N |
| 0.7 MPa | 79 N | 59 N |
| Max (@1.0 MPa) | 12 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 MI12X55SU
| MI | ISO 6432 round-body mini cylinder (double-acting). |
|---|---|
| 12 | Bore size in mm. |
| ×55 | 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 MI12X55SU Is Used
Electronic Component Sorting
Pushes small PCBs or connectors down a guided chute using a reliable 56.5 N force, with the U cover allowing tight 90-degree bracket mounting.
Small Carton Flap Folding
Actuates a lightweight folding arm on a packaging line, where the 55 mm stroke and 2.9 kg vertical lift capacity handle thin cardboard flaps efficiently.
Lab Sample Diverting
Pivots a diverter gate for specimen tubes in diagnostic equipment, utilizing the stainless construction to withstand frequent wipe-downs and humid conditions.
Is the Airtac MI8~12 Stainless Steel Mini Cylinder MI12X55SU the Right Cylinder?
When sizing this 55 mm stroke unit, consider the adjacent bores: the smaller Ø8 generates 25.1 N, whereas the larger Ø16 provides 100.5 N at 0.5 MPa. If your application loses air or the valve centers, the piston will drift, as the fixed TPU bumper pads only decelerate the stroke end rather than locking the load. To maintain vertical position holding, incorporate an external pilot check valve or rod lock.
The ISO 6432 mounting dimensions allow this model to drop directly into standard mini-cylinder brackets and clevises. Because this SKU includes the -S magnet, it is fully compatible with CMSG, DMSG, and EMSG sensors. For higher cycle speeds requiring adjustable deceleration, evaluate the MIC variable cushion variant instead.
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 MI12X55SU FAQ
At 0.5 MPa, the push force is 56.5 N and the pull force is 42.4 N. At 0.7 MPa, push is 79.1 N and pull is 59.4 N. The theoretical maximum force is 11.5 kgf at 1.0 MPa. The air port is M5x0.8.
No, the piston will drift if air is lost or the valve is centered. The fixed TPU bumper pads only decelerate the rod at the stroke end; they do not act as a brake. Use an external rod lock or pilot-operated check valve for load holding.
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