Airtac MI8~12 Stainless Steel Mini Cylinder MI8X45SU
The AirTAC Airtac MI8~12 Stainless Steel Mini Cylinder MI8X45SU is a genuine double acting round-body mini air cylinder with a Ø8mm bore and 45mm 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
- Stroke45 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 MI8X45SU
Delivering 25.1 N of push force at 0.5 MPa, this double-acting stainless-steel round-body mini cylinder handles compact 45 mm strokes with ease. Its riveted stainless barrel and rod shrug off mild corrosion, giving it a real edge over painted-aluminium alternatives in damp or washdown settings. The built-in magnet (-S) supports CMSG, DMSG and EMSG switches for position sensing, while the U back cover provides a 90-degree port orientation for tight spaces. The M5x0.8 port matches the 8 mm bore standard.
Because the theoretical output is limited, plan for a safe working load of roughly 15 N (about 60 percent of the 0.5 MPa rating) to account for friction and real-world dynamics. For vertical lifting, that translates to hoisting about 1.3 kg safely with a 2:1 margin. Fixed TPU bumper pads absorb the impact at stroke extremes, and the ISO 6432 mounting interface lets you drop this cylinder straight into standard mini-cylinder brackets and clevises.
Airtac MI8~12 Stainless Steel Mini Cylinder MI8X45SU Technical Specifications
| Model | Airtac MI8~12 Stainless Steel Mini Cylinder MI8X45SU |
|---|---|
| Series | MI ISO 6432 mini cylinder |
| Bore size | Ø8 mm |
| Stroke | 45 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 MI8X45SU
| MI | ISO 6432 round-body mini cylinder (double-acting). |
|---|---|
| 8 | Bore size in mm. |
| ×45 | 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 MI8X45SU Is Used
Micro-Clamp Actuation
Drives small pneumatic clamps in PCB assembly fixtures, using its 25.1 N push force to hold delicate electronic components firmly without crushing them.
Lab Dispenser Positioning
Moves a lab fluid dispensing nozzle through a 45 mm stroke, where the stainless build resists chemical exposure and the -S magnet tracks fill levels.
Lightweight Part Ejection
Pushes tiny moulded plastic parts out of a machining zone, relying on the 90-degree U cover port to keep the pneumatic tubing neatly routed away.
Is the Airtac MI8~12 Stainless Steel Mini Cylinder MI8X45SU the Right Cylinder?
When sizing this 8 mm bore, stepping up to the 10 mm option raises the 0.5 MPa push force to 39.3 N if your 15 N safe working load calculation falls short. As the smallest available MI bore, there is no smaller standard AirTAC mini cylinder to step down to. The U rear cover offers a 90-degree orientation, so verify your manifold layout matches this geometry before ordering.
Remember that a standard double-acting cylinder drifts when air pressure is lost or the valve is centred, as the fixed TPU bumpers only decelerate the end of stroke and act as neither a brake nor a lock. To suspend a load securely during an air failure, integrate an external rod lock or a pilot-operated check valve into your circuit.
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 MI8X45SU FAQ
The 8 mm bore generates 25.1 N push and 18.8 N pull at 0.5 MPa, increasing to 35.2 N push and 26.4 N pull at 0.7 MPa, with a theoretical maximum of 5.1 kgf at 1.0 MPa. It uses an M5x0.8 air port and a 4 mm rod with an M4x0.7 male thread.
Yes, the -S suffix indicates a built-in piston magnet, allowing you to mount CMSG, DMSG or EMSG reed and electronic switches directly onto the stainless-steel round body for precise end-of-stroke detection.
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