Airtac MI25~40 Stainless Steel Mini Cylinder MI25X300U
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI25X300U is a genuine double acting round-body mini air cylinder with a Ø25mm bore and 300mm 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
- Stroke300 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 MI25X300U
Delivering 245.3 N of push force at 0.5 MPa, this double-acting stainless-steel round-body mini cylinder handles demanding 300 mm strokes with a 1/8" port and M10x1.25 male rod thread. The stainless barrel and piston rod naturally resist mild corrosion, giving it a real edge over painted-steel or aluminium alternatives in damp, food, or outdoor environments. Its riveted and rolled construction remains compact, while fixed TPU bumper pads absorb the impact at stroke extremes to protect the mechanism.
Because the Ø25 bore adheres to ISO 6432 mounting dimensions, it drops directly into standard mini-cylinder brackets and clevises for easy design integration. For practical sizing, plan for about 147 N of real work at 0.5 MPa, which translates to safely lifting a 12.5 kg load vertically. Note that this specific SKU lacks the -S magnet, meaning it cannot accept CMSG, DMSG, or EMSG position switches.
Airtac MI25~40 Stainless Steel Mini Cylinder MI25X300U Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI25X300U |
|---|---|
| Series | MI ISO 6432 mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 300 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 MI25X300U
| MI | ISO 6432 round-body mini cylinder (double-acting). |
|---|---|
| 25 | Bore size in mm. |
| ×300 | 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 MI25X300U Is Used
Package Sorting Diverter
Uses the 245.3 N thrust at 0.5 MPa to push parcels firmly across transfer plates, with the 300 mm stroke providing ample reach across the belt width.
Damp Environment Gate
Leverages the stainless steel barrel and rod to reliably actuate a washdown-resistant flow control gate in a food processing facility without corroding.
Vertical Parts Elevator
Lifts lightweight component trays weighing up to 12.5 kg vertically, taking advantage of the 90-degree U cover to keep supply lines neatly tucked away.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI25X300U the Right Cylinder?
When sizing this 245.3 N push unit, consider stepping down to the Ø20 bore if your application only requires 157.0 N at 0.5 MPa, or moving up to the Ø32 bore for 402.2 N of thrust. The 300 mm stroke is well within the 500 mm maximum standard stroke for this bore, though at this length you must carefully manage side loading to prevent rod bending and premature seal wear. The U back cover provides a 90-degree port and mounting orientation, which helps route hoses cleanly in tight machinery.
Remember that the fixed TPU bumpers only decelerate the piston near the stroke end; they do not act as a brake. If air pressure drops or the valve is centred, the piston will drift and cannot hold a load in place. To secure a suspended weight, you must integrate an external rod lock or a pilot-operated check valve into your pneumatic circuit.
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 MI25X300U FAQ
This double-acting cylinder uses a 1/8" port and generates 245.3 N push / 206.1 N pull at 0.5 MPa, and 343.4 N push / 288.5 N pull at 0.7 MPa. The theoretical maximum force is 50 kgf at 1.0 MPa.
No, this specific SKU does not include a magnet, so CMSG, DMSG, or EMSG switches cannot be used. You would need the -S variant for sensing. It uses fixed TPU bumper pads rather than an adjustable air cushion, and conforms to ISO 6432 mounting dimensions for standard brackets.
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