Airtac MI8~12 Stainless Steel Mini Cylinder MI8X40CA
The AirTAC Airtac MI8~12 Stainless Steel Mini Cylinder MI8X40CA 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
About the Airtac MI8~12 Stainless Steel Mini Cylinder MI8X40CA
Delivering 25.1 N of push force at 0.5 MPa, this double-acting stainless-steel round-body mini cylinder handles precise 40 mm strokes in tight spaces. The Ø8 mm bore uses an M5x0.8 port and a Ø4 mm piston rod with an M4x0.7 male thread. Its stainless barrel and rod resist mild corrosion, giving it a real edge over painted alternatives in damp or washdown environments. Fixed TPU bumper pads absorb the stroke-end impact to protect your mechanism.
Because it conforms to ISO 6432 mounting dimensions, the body drops directly into standard mini-cylinder brackets and clevises. Plan for a real work load of about 15 N at 0.5 MPa, which means it can safely lift a 1.3 kg part vertically with a 2:1 safety margin. Note that this specific SKU lacks the -S magnet, so it cannot host CMSG, DMSG or EMSG reed switches.
Airtac MI8~12 Stainless Steel Mini Cylinder MI8X40CA Technical Specifications
| Model | Airtac MI8~12 Stainless Steel Mini Cylinder MI8X40CA |
|---|---|
| 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 MI8X40CA
| 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 MI8X40CA Is Used
Micro Gripper Actuation
Provides the 25.1 N push stroke to open and close small pneumatic grippers handling delicate electronic components on PCB assembly lines.
Lab Sample Diverting
The stainless build and CA pivot mount suit laboratory environments, swinging a diverter gate to route 1.3 kg fluid samples into test chambers.
Small Part Ejection
Uses its 40 mm stroke to push lightweight plastic moulded parts out of a sub-assembly fixture without marking the product surface.
Is the Airtac MI8~12 Stainless Steel Mini Cylinder MI8X40CA the Right Cylinder?
As the smallest bore in the range, sizing up means stepping to the Ø10 version, which raises the push force to 39.3 N at 0.5 MPa. If you need to hold a vertical load mid-stroke, remember that air pressure alone will not lock the piston if supply drops or the valve centres; the rod will drift. You must add an external pilot-operated check valve or a mechanical rod lock for secure holding. The built-in CA rear pivot cover allows clevis mounting, while front options include LB foot or FA flange brackets. For this 40 mm stroke, side loads are minimal, but always guide the rod end to prevent bending.
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 MI8X40CA FAQ
At 0.5 MPa it pushes with 25.1 N and pulls with 18.8 N. At 0.7 MPa it pushes 35.2 N and pulls 26.4 N. The theoretical maximum force is 5.1 kgf at 1.0 MPa. The air port is M5x0.8 and the male rod thread is M4x0.7.
No, this specific SKU does not include the -S magnet, so it cannot accept CMSG, DMSG or EMSG switches. You would need the MI8X40CA-S variant for position sensing. It uses fixed TPU bumper pads for end-of-stroke deceleration rather than an adjustable air cushion.
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