Airtac MI8~12 Stainless Steel Mini Cylinder MI8X50SU
The AirTAC Airtac MI8~12 Stainless Steel Mini Cylinder MI8X50SU is a genuine double acting round-body mini air cylinder with a Ø8mm bore and 50mm 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
- Stroke50 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 MI8X50SU
Delivering 25.1 N of push force at 0.5 MPa, this double-acting stainless-steel round-body mini cylinder handles compact actuation with ease. The Ø8 mm bore uses an M5x0.8 air port and a Ø4 mm piston rod with an M4x0.7 male thread. Its riveted stainless barrel and rod shrug off mild corrosion, giving it a real edge over painted alternatives in damp or washdown settings. Because this SKU includes the -S magnet, it is fully ready for CMSG, DMSG or EMSG position switches.
At 0.5 MPa you can expect about 15 N of actual work output, which translates to lifting a 1.3 kg part vertically with a safe 2:1 margin. The U-style back cover provides a 90-degree port orientation for tight routing. Fixed TPU bumper pads absorb the impact at stroke end to protect the mechanism, while the ISO 6432 mounting interface lets you drop it straight into standard mini-cylinder brackets and clevises.
Airtac MI8~12 Stainless Steel Mini Cylinder MI8X50SU Technical Specifications
| Model | Airtac MI8~12 Stainless Steel Mini Cylinder MI8X50SU |
|---|---|
| Series | MI ISO 6432 mini cylinder |
| Bore size | Ø8 mm |
| Stroke | 50 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 MI8X50SU
| MI | ISO 6432 round-body mini cylinder (double-acting). |
|---|---|
| 8 | Bore size in mm. |
| ×50 | 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 MI8X50SU Is Used
Micro-Dispenser Dosing
Extends a 50 mm stroke to actuate a micro-valve for adhesive dosing, using the 15 N safe working load to pressurise the fluid chamber without overstressing delicate fittings.
Lab Tube Ejection
Pushes lightweight sample tubes out of a centrifuge carousel, where the stainless build resists humidity and the 1.3 kg vertical lift capacity easily clears the plastic rack.
Small Part Sorting
Diverts tiny plastic components on a conveyor using the U-style 90-degree back cover for side-mounted air lines, while a DMSG sensor tracks the 50 mm travel via the built-in magnet.
Is the Airtac MI8~12 Stainless Steel Mini Cylinder MI8X50SU the Right Cylinder?
If the 25.1 N push at 0.5 MPa is too high for a delicate task, you can step down by using a pressure regulator, as the Ø8 is the smallest available MI bore. If you need more force, stepping up to the Ø12 bore raises the push force to 56.5 N at 0.5 MPa. This 50 mm stroke is well within the 150 mm maximum standard stroke for the Ø8 bore, keeping the rod bending risk low. Remember that a plain cylinder drifts when air is lost or a valve is centred; the TPU pads only decelerate the stroke end and do not act as a brake. For a suspended load, specify an external rod lock or a pilot-operated check valve.
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 MI8X50SU FAQ
This Ø8 mm bore cylinder features an M5x0.8 air port. It generates a push force of 25.1 N and a pull force of 18.8 N at 0.5 MPa. At 0.7 MPa, the push is 35.2 N and the pull is 26.4 N. The theoretical maximum force is 5.1 kgf at 1.0 MPa.
No, the piston will drift if air pressure is lost or the valve is centred. The fixed TPU bumper pads only decelerate the rod at the stroke end to reduce impact; they do not function as a lock or brake. You must add an external rod lock or pilot check valve to hold a load safely.
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