Airtac MI25~40 Stainless Steel Mini Cylinder MI25X40SU
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI25X40SU is a genuine double acting round-body mini air cylinder with a Ø25mm bore and 40mm 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
- Stroke40 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 MI25X40SU
Delivering 245.3 N of push force at 0.5 MPa, this double-acting stainless-steel round-body mini cylinder handles robust actuation tasks. The riveted barrel and rod resist mild corrosion, giving it a real edge over painted alternatives in damp or washdown settings. A built-in piston magnet (-S) supports CMSG, DMSG, and EMSG switches for position sensing.
Equipped with a 90-degree U back cover and a 1/8" port, it integrates cleanly into existing pneumatic setups. The fixed TPU bumper pads absorb stroke-end impact without offering adjustable cushioning. For practical sizing, plan for about 147 N of real work at 0.5 MPa, which means it lifts roughly 12.5 kg vertically with a 2:1 safety margin.
Airtac MI25~40 Stainless Steel Mini Cylinder MI25X40SU Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI25X40SU |
|---|---|
| Series | MI ISO 6432 mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 40 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 MI25X40SU
| MI | ISO 6432 round-body mini cylinder (double-acting). |
|---|---|
| 25 | 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 MI25~40 Stainless Steel Mini Cylinder MI25X40SU Is Used
Package Diverting Gate
Actuates a routing flap on a packaging conveyor, using its 245.3 N push force to redirect cartons weighing up to 12.5 kg reliably.
Clamp Station
Secures aluminum extrusions at a machining center, utilizing the 90-degree U cover for compact mounting and the magnet for stroke confirmation.
Parts Ejector
Pushes completed metal fittings out of a die area, where the stainless build prevents corrosion from cutting fluids and ambient humidity.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI25X40SU the Right Cylinder?
When sizing this 25 mm bore, stepping down to a 20 mm bore drops the push force to 157 N at 0.5 MPa, while stepping up to a 32 mm bore increases it to 402 N. This model includes the U back cover for 90-degree port orientation and the -S magnet for electronic or reed sensors. The 40 mm stroke is well within the 500 mm maximum, keeping the rod highly resistant to bending.
Remember that a standard double-acting cylinder drifts if air pressure drops or the valve centers. The TPU bumpers only soften the end-of-stroke impact and do not function as a locking mechanism. To suspend a load safely during an air loss event, install an external rod lock or a pilot-operated check valve.
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 MI25X40SU FAQ
At 0.5 MPa, the push force is 245.3 N and the pull force is 206.1 N. At 0.7 MPa, push is 343.4 N and pull is 288.5 N. The theoretical maximum force is 50 kgf at 1.0 MPa. The air port size is 1/8".
No, the piston will drift if air pressure is lost or the valve is centered. The fixed TPU bumper pads only decelerate the stroke end and do not act as a brake. For vertical loads, use an external rod lock or pilot check valve.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac MI25~40 Stainless Steel Mini Cylinder MI25X40SU
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.