Airtac MI25~40 Stainless Steel Mini Cylinder MI25X320SU
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI25X320SU is a genuine double acting round-body mini air cylinder with a Ø25mm bore and 320mm 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.
- BoreØ25 mm
- Stroke320 mm
- Port size1/8"
- Acting typeDouble acting
- Rod threadM10×1.25
- 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 MI25~40 Stainless Steel Mini Cylinder MI25X320SU
Delivering 245.3 N of push force at 0.5 MPa, this double-acting stainless-steel round-body mini cylinder handles demanding actuation across its 320 mm stroke. The Ø25 bore uses a 1/8" port and an M10x1.25 male rod thread. Its stainless barrel and rod resist mild corrosion, giving it a real edge over painted alternatives in damp or washdown settings. The built-in magnet (-S) directly supports CMSG, DMSG and EMSG position switches.
Because the 245.3 N rating leaves a safety margin, plan for roughly 147 N of actual work at 0.5 MPa. This translates to lifting about 12.5 kg vertically with a 2:1 margin, letting you match the cylinder to real part weights. The riveted body incorporates fixed TPU bumper pads that decelerate the piston at stroke end, while the U rear cover provides a 90-degree port orientation for tight machinery layouts.
Airtac MI25~40 Stainless Steel Mini Cylinder MI25X320SU Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI25X320SU |
|---|---|
| Series | MI ISO 6432 mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 320 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.
Theoretical Output Force (Ø25mm)
| 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.
Model Code: Airtac MI25~40 Stainless Steel Mini Cylinder MI25X320SU
| MI | ISO 6432 round-body mini cylinder (double-acting). |
|---|---|
| 25 | Bore size in mm. |
| ×320 | 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 MI25~40 Stainless Steel Mini Cylinder MI25X320SU Is Used
Package Diverting Gate
Actuates a routing flap on a 300 mm pitch conveyor to sort medium-weight cartons, utilising the 320 mm stroke to clear the belt path fully.
Vertical Parts Elevator
Raises lightweight metal fixtures between machine levels; the stainless build withstands humid factory environments while lifting around 12.5 kg safely.
Film Roll Pusher
Advances a new shrink-wrap roll into a sealing machine cradle, relying on the 90-degree U cover to keep the 1/8" air line tidy against the frame.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI25X320SU the Right Cylinder?
When sizing this 245.3 N (at 0.5 MPa) unit, the adjacent Ø20 bore generates 157.0 N and the larger Ø32 bore provides 402.2 N, allowing you to step up or down if the load changes. The 320 mm stroke is well within the 500 mm maximum for this bore, but at this length you should minimize side loads to prevent rod bending and guide the load mechanically. The U back cover offers a 90-degree mounting interface for compact installations.
Remember that a standard double-acting cylinder drifts when air is removed or the valve is centred; the TPU bumpers only soften the end-of-stroke impact and do not function as a brake. To suspend a load safely, fit an external rod lock or a pilot-operated check valve. Position detection requires the integrated magnet, which pairs with CMSG, DMSG or EMSG sensors.
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 MI25~40 Stainless Steel Mini Cylinder MI25X320SU FAQ
This Ø25 mm bore cylinder features a 1/8" port and an M10x1.25 male rod thread. It generates 245.3 N push and 206.1 N pull at 0.5 MPa, increasing to 343.4 N push and 288.5 N pull at 0.7 MPa, with a theoretical maximum of 50 kgf at 1.0 MPa.
Yes, the Ø25 bore uses the standard ISO 6432 mounting interface, so it drops directly into standard mini-cylinder brackets and clevises. The -S suffix denotes a built-in piston magnet, allowing you to mount CMSG, DMSG or EMSG reed and electronic switches for precise end-of-stroke detection.
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