Airtac MI8~12 Stainless Steel Mini Cylinder MI8X40SU
The AirTAC Airtac MI8~12 Stainless Steel Mini Cylinder MI8X40SU is a genuine double acting round-body mini air cylinder with a Ø8mm 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.
- BoreØ8 mm
- Stroke40 mm
- Port sizeM5×0.8
- Acting typeDouble acting
- Rod threadM4×0.7
- CushionFixed TPU bumper pads
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MI8~12 Stainless Steel Mini Cylinder MI8X40SU
Delivering 25.1 N of push force at 0.5 MPa, the AirTAC MI8X40SU is a compact double-acting round-body mini cylinder built for tight spaces. Its stainless-steel barrel and rod shrug off mild corrosion, giving it a real edge over painted alternatives in damp or washdown settings. The riveted construction keeps the unit light, while fixed TPU bumper pads absorb end-of-stroke impacts. Because this 8 mm bore uses the ISO 6432 mounting interface, it drops directly into standard mini-cylinder brackets and clevises.
Equipped with a built-in piston magnet (-S), this version supports CMSG, DMSG and EMSG reed or electronic switches for position sensing. The U-style back cover provides a 90-degree port and mounting orientation. For practical sizing, plan for about 15 N of real work at 0.5 MPa, which means it lifts roughly 1.3 kg vertically with a 2:1 safety margin. Air connects via an M5x0.8 port, and the 4 mm rod features an M4x0.7 male thread.
Airtac MI8~12 Stainless Steel Mini Cylinder MI8X40SU Technical Specifications
| Model | Airtac MI8~12 Stainless Steel Mini Cylinder MI8X40SU |
|---|---|
| Series | MI ISO 6432 mini cylinder |
| Bore size | Ø8 mm |
| Stroke | 40 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 MI8X40SU
| MI | ISO 6432 round-body mini cylinder (double-acting). |
|---|---|
| 8 | 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 MI8X40SU Is Used
Micro-Clamp Actuation
Drives small pneumatic clamps in PCB assembly fixtures, using the 25.1 N thrust to secure delicate components without crushing them.
Lab Dispenser Push
Precisely pushes the plunger of a micro-fluidic valve in automated lab testing equipment, relying on the 15 N safe working load for consistent fluid metering.
Light Part Ejection
Ejects small plastic moulded parts from a conveyor chute, where the stainless construction withstands occasional coolant mist and the 1.3 kg lift capacity handles light rejects.
Is the Airtac MI8~12 Stainless Steel Mini Cylinder MI8X40SU the Right Cylinder?
When sizing this 8 mm bore, note there is no smaller option in the MI family, but stepping up to the Ø10 bore increases push force to 39.3 N at 0.5 MPa if your payload exceeds the 15 N safe working load. The 40 mm stroke is well within the 150 mm maximum standard stroke, so no made-to-order sizing is required here. Mounting options include LB foot, FA flange, SDB pivot and TC trunnion, complementing the 90-degree U back cover.
Remember that a plain double-acting cylinder drifts if air pressure drops or the valve is centred; the TPU bumpers only decelerate the stroke end and do not act as a brake. To hold a vertical load securely during an air loss event, fit 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 MI8X40SU 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.
Yes, the -S suffix means it has a built-in magnet for CMSG, DMSG or EMSG switches. It does not hold position on air loss; the fixed TPU bumpers only decelerate the stroke end. Use a pilot check valve for load holding.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac MI8~12 Stainless Steel Mini Cylinder MI8X40SU
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.