
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI32X85SCM is a genuine double acting round-body mini air cylinder with a Ø32mm bore and 85mm stroke, 1/8" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
Delivering 402.2 N of push force at 0.5 MPa, this double-acting round-body mini cylinder handles demanding actuation tasks. The stainless-steel barrel and Ø12 mm rod shrug off mild corrosion and washdown environments better than painted alternatives. Fixed TPU bumper pads absorb stroke-end impacts, while the CM round end cover keeps the rear profile smooth for tight machine layouts.
Driven by a 1/8 inch air port, the unit operates at speeds of 30-800 mm/s. Because the bore is Ø32, it falls outside the ISO 6432 standard yet retains a highly compact riveted construction. Plan for roughly 241 N of actual work at 0.5 MPa, which translates to lifting about 20.5 kg vertically with a sensible 2:1 safety margin.
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI32X85SCM |
|---|---|
| Series | MI mini cylinder |
| Bore size | Ø32 mm |
| Stroke | 85 mm |
| Acting type | Double acting |
| Port size | 1/8" |
| Rod thread | M10×1.25 |
| 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 500 mm |
Specifications follow the official AirTAC MI/MIC (ISO 6432) datasheet. Barrel & rod: stainless steel (round-body, riveted construction). Thread options: PT (blank) / G. Note: the Ø32 bore is a larger, non-ISO-6432 size.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | 484 N |
| Max (@1.0 MPa) | 82 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
| MI | round-body mini cylinder (double-acting). |
|---|---|
| 32 | Bore size in mm. |
| ×85 | 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.
Shifts heavy cardboard cartons on a sorting line using the 402.2 N push force, with the stainless build surviving dusty and occasionally damp warehouse edges.
Drives a 12 mm rod down an 85 mm stroke to seat hardware into aluminium housings, relying on the fixed TPU pads to soften the end-of-stroke impact.
Extends to halt incoming pallets at a wrapping station, where the CM round end and riveted body provide a compact, low-profile footprint behind the conveyor frame.
When sizing this 85 mm stroke actuator, compare it against its neighbours: the Ø25 bore yields 245.3 N of push at 0.5 MPa, whereas stepping up to the Ø40 provides 628.3 N. This model includes the -S magnet for direct CMSG, DMSG or EMSG sensor mounting. If your process loses air or centres the valve, the piston will drift and drop the load, as the TPU pads only decelerate the stroke end rather than locking it; specify an external rod lock or pilot check valve for secure holding. For an 85 mm extension, ensure your mounting bracket—whether LB foot, FA flange or TC trunnion—supports the rod against side-load bending.
Quick checklist
This double-acting cylinder uses a 1/8 inch air port and generates 402.2 N push / 345.6 N pull at 0.5 MPa, 563 N push / 483.8 N pull at 0.7 MPa, and a theoretical maximum of 82 kgf at 1.0 MPa.
Yes, the -S suffix means a piston magnet is built in for CMSG, DMSG or EMSG switches. However, it does not hold position on air loss; the piston drifts, so add an external rod lock or pilot check valve for load holding.
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