Airtac MI8~12 Stainless Steel Mini Cylinder MI12X40U
The AirTAC Airtac MI8~12 Stainless Steel Mini Cylinder MI12X40U 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 MI12X40U
Delivering 56.5 N of push force at 0.5 MPa, this double-acting stainless-steel mini cylinder is built for compact automation. The Ø12 mm bore uses an M5x0.8 air port and a Ø6 mm piston rod with an M6x1.0 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 impact at stroke ends to protect the mechanism.
Because it follows ISO 6432 mounting dimensions, the body drops directly into standard mini-cylinder brackets and clevises. This specific SKU lacks a magnet, so it cannot host CMSG, DMSG, or EMSG sensors without upgrading to an -S variant. For practical sizing, plan for roughly 34 N of actual work at 0.5 MPa, which means it can lift about 2.9 kg vertically with a safe 2:1 margin.
Airtac MI8~12 Stainless Steel Mini Cylinder MI12X40U Technical Specifications
| Model | Airtac MI8~12 Stainless Steel Mini Cylinder MI12X40U |
|---|---|
| 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 MI12X40U
| 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 MI12X40U Is Used
Package Diverting Gate
Actuates a lightweight routing flap on a packaging conveyor, using the 90-degree U cover to pivot the mechanism cleanly within a tight transfer station.
Lab Sample Ejection
Pushes small specimen vials out of a testing carousel with a precise 40 mm stroke, leveraging the stainless build to resist chemical spills and daily wipe-downs.
Small Part Sorting
Provides the 56.5 N push required to kick defective plastic components off an inspection track without overshooting, relying on fixed TPU pads to soften the impact.
Is the Airtac MI8~12 Stainless Steel Mini Cylinder MI12X40U the Right Cylinder?
When sizing this 12 mm bore, compare it against its neighbours: the smaller Ø8 generates 25.1 N of push, while the larger Ø16 provides 100.5 N at 0.5 MPa. If your load exceeds the 34 N safe working threshold, stepping up to the 16 mm bore is advisable. The U suffix denotes a 90-degree rear cover, orienting the rear port or pivot perpendicular to the body for tight spatial constraints.
Remember that a standard double-acting cylinder drifts when air is lost or the valve is centered, as the fixed TPU bumpers only decelerate the stroke end rather than locking the rod. To suspend a load safely, integrate an external rod lock or a pilot-operated check valve into your circuit. The 40 mm stroke is well within the 250 mm maximum, keeping rod bending stress minimal even at the 30-800 mm/s operating speed range.
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 MI12X40U FAQ
This 12 mm bore cylinder features an M5x0.8 air port and delivers a push force of 56.5 N and a pull force of 42.4 N at 0.5 MPa. At 0.7 MPa, the push increases to 79.1 N and the pull to 59.4 N. The theoretical maximum force is 11.5 kgf at 1.0 MPa.
No, this specific SKU does not include a magnet, so it cannot support CMSG, DMSG, or EMSG switches. You must select an -S variant of the MI series to enable position sensing. The unit uses standard ISO 6432 mounting dimensions and features a 90-degree U back cover for perpendicular mounting.
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