Airtac MI8~12 Stainless Steel Mini Cylinder MI12X40SU
The AirTAC Airtac MI8~12 Stainless Steel Mini Cylinder MI12X40SU is a genuine double acting round-body mini air cylinder with a Ø12mm bore and 40mm 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
- Stroke40 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 MI12X40SU
Delivering 56.5 N of push force at 0.5 MPa, this double-acting stainless-steel mini cylinder handles compact actuation where mild corrosion or washdown is a concern. The Ø12 mm bore uses an M5x0.8 port and a 6 mm piston rod with an M6x1.0 male thread. Its round-body, riveted construction keeps the unit light, while fixed TPU bumper pads absorb impact energy at the stroke ends.
Because the bore falls within the Ø8-Ø25 range, the body features an ISO 6432 mounting interface, dropping directly into standard mini-cylinder brackets and clevises. The built-in piston magnet (-S) supports CMSG, DMSG and EMSG switches for position sensing. Plan for roughly 34 N of actual work at 0.5 MPa, which translates to lifting about 2.9 kg vertically with a 2:1 safety margin.
Airtac MI8~12 Stainless Steel Mini Cylinder MI12X40SU Technical Specifications
| Model | Airtac MI8~12 Stainless Steel Mini Cylinder MI12X40SU |
|---|---|
| Series | MI ISO 6432 mini cylinder |
| Bore size | Ø12 mm |
| Stroke | 40 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 MI12X40SU
| MI | ISO 6432 round-body mini cylinder (double-acting). |
|---|---|
| 12 | 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 MI8~12 Stainless Steel Mini Cylinder MI12X40SU Is Used
Small Part Ejection
Pushes lightweight plastic mouldings out of an injection press chute using a safe 34 N working load.
Package Deflection
Diverts small cardboard cartons on a packaging line where the stainless rod shrugs off washdown.
Lab Dispenser Actuation
Moves a dosing valve 40 mm to dispense reagents, relying on CMSG sensors to confirm the stroke.
Is the Airtac MI8~12 Stainless Steel Mini Cylinder MI12X40SU the Right Cylinder?
When sizing this 12 mm bore, compare it against its neighbours: a 10 mm option provides 39.3 N of push, while stepping up to a 16 mm bore yields 100.5 N at 0.5 MPa. The U-style back cover provides a 90-degree port and mounting orientation, which helps route tubing cleanly in tight machinery. For position feedback, the internal magnet pairs directly with CMSG, DMSG or EMSG sensors.
Remember that a standard double-acting cylinder drifts if air pressure drops or the valve is centred, as the TPU bumpers only soften the end-of-stroke impact rather than locking the rod. To suspend a load safely during an air loss event, fit an external rod lock or a pilot-operated check valve. Additionally, keep side-loading minimized on this 40 mm stroke to prevent rod bending and premature seal wear.
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 MI12X40SU FAQ
At 0.5 MPa it provides 56.5 N push and 42.4 N pull. At 0.7 MPa the output rises to 79.1 N push and 59.4 N pull. The theoretical maximum force is 11.5 kgf at 1.0 MPa. The air port is M5x0.8.
No, the piston will drift. The fixed TPU bumper pads only decelerate the rod near the stroke end and do not act as a brake. To maintain a vertical position during air loss, install an external rod lock or pilot check valve.
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