
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI25X220SCM is a genuine double acting round-body mini air cylinder with a Ø25mm bore and 220mm stroke, 1/8" 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.
Delivering 245.3 N of push force at 0.5 MPa, this double-acting stainless-steel round-body mini cylinder handles substantial work within a compact footprint. The Ø25 mm bore uses a 1/8" port and an M10x1.25 male rod thread, making it highly capable for heavier tooling. Its stainless barrel and rod resist mild corrosion, offering a real advantage over painted alternatives in damp or washdown environments. The riveted construction keeps the body light, while fixed TPU bumper pads absorb the impact at stroke ends.
With a 220 mm stroke, the rod travels far enough for deep-reaching tasks while maintaining a standard length within the 500 mm maximum. The built-in magnet (indicated by the S) supports CMSG, DMSG and EMSG switches for position sensing. For practical sizing, plan for a safe working load of about 147 N rather than the absolute maximum. In vertical lifting scenarios, this translates to hoisting roughly 12.5 kg safely with a 2:1 margin, ensuring the piston does not drift under load.
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI25X220SCM |
|---|---|
| Series | MI ISO 6432 mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 220 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.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 245 N | 206 N |
| 0.7 MPa | 344 N | 289 N |
| Max (@1.0 MPa) | 50 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
| MI | ISO 6432 round-body mini cylinder (double-acting). |
|---|---|
| 25 | Bore size in mm. |
| ×220 | 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.
Pushes medium-weight cartons off a main conveyor belt using the 245.3 N push force and 220 mm stroke to clear the lane safely.
Drives small dowel pins into aluminum housings on an assembly line, utilizing the 343.4 N output at 0.7 MPa for reliable insertion.
Hoists 12.5 kg material bins between tiers of a packaging machine, relying on the stainless build to endure humid ambient conditions.
Choosing this Ø25 bore means you need more force than a Ø20 can provide (157 N at 0.5 MPa) but want a smaller footprint than the larger Ø32 (402 N at 0.5 MPa). The 220 mm stroke is well within standard limits, though at this extension you should watch for side-loading to avoid rod bending. The CM round end cover dictates the rear mounting orientation, and the ISO 6432 mounting interface means it drops directly into standard mini-cylinder brackets and clevises.
Because the base MI relies on fixed TPU bumper pads to decelerate, it cannot hold a load if air pressure drops or the valve is centered; the piston will drift. For applications requiring a locked position, you must add an external rod lock or a pilot-operated check valve. The integrated magnet pairs perfectly with CMSG, DMSG or EMSG sensors for precise end-of-stroke detection.
Quick checklist
This Ø25 mm bore cylinder features a 1/8" port and an M10x1.25 male rod thread. At 0.5 MPa it provides 245.3 N push and 206.1 N pull. At 0.7 MPa it yields 343.4 N push and 288.5 N pull. The theoretical maximum force is 50 kgf at 1.0 MPa.
No, the fixed TPU bumper pads only decelerate the piston at the stroke end; they do not act as a brake. If air is lost, the rod will drift. To hold a vertical load securely, install an external rod lock or a pilot-operated check valve.
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