Airtac MI25~40 Stainless Steel Mini Cylinder MI25X250SU
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI25X250SU is a genuine double acting round-body mini air cylinder with a Ø25mm bore and 250mm 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
- Stroke250 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 MI25X250SU
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 riveted barrel and piston rod shrug off mild corrosion, making it a hardier choice than painted alternatives in damp processing areas. Its 1/8" port feeds the 10 mm rod to move loads across a 250 mm stroke, while fixed TPU bumper pads absorb the end-of-travel impact without offering adjustable cushioning.
Because the Ø25 bore adheres to ISO 6432 mounting dimensions, it drops directly into standard mini-cylinder brackets and clevises. The built-in magnet (-S) supports CMSG, DMSG and EMSG switches for position sensing, and the U back cover provides a 90-degree port orientation for tight machinery layouts. Plan for roughly 147 N of actual work at 0.5 MPa to maintain a safe margin, which translates to lifting a 12.5 kg part vertically with a 2:1 safety factor.
Airtac MI25~40 Stainless Steel Mini Cylinder MI25X250SU Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI25X250SU |
|---|---|
| Series | MI ISO 6432 mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 250 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 MI25X250SU
| MI | ISO 6432 round-body mini cylinder (double-acting). |
|---|---|
| 25 | Bore size in mm. |
| ×250 | 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 MI25X250SU Is Used
Package Divert Gate
Actuates a routing flap on a packaging conveyor, using the 245.3 N thrust to push heavy cartons onto secondary tracks at speed.
Vertical Parts Lift
Raises lightweight jigs over a 250 mm gap in an assembly cell, safely lifting parts up to 12.5 kg thanks to a calculated 2:1 safety margin.
Washdown Valve Trigger
Cycles a diverter valve in a damp food-processing line, where the stainless barrel and rod resist mild corrosion better than standard painted bodies.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI25X250SU the Right Cylinder?
When sizing this 245.3 N (at 0.5 MPa) unit, compare it against the adjacent bores: a Ø20 generates 157.0 N of push, whereas a Ø32 jumps to 402.2 N. Choose this Ø25 model when the smaller bore lacks thrust and the larger is physically excessive. For the 250 mm stroke, ensure your mounting configuration—such as an LB foot or FA flange—prevents rod side-loading, as longer strokes amplify bending stresses on the 10 mm rod.
The U rear cover dictates a 90-degree entry, helping route the 1/8" pneumatic lines cleanly in confined spaces. Remember that a standard double-acting cylinder drifts if air pressure drops or the valve centers; the TPU bumpers only decelerate the stroke end and will not lock the load. To suspend a vertical weight safely, 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 MI25X250SU FAQ
At 0.5 MPa it provides 245.3 N of push and 206.1 N of pull. At 0.7 MPa the push is 343.4 N and pull is 288.5 N. The theoretical maximum force is 50 kgf at 1.0 MPa. This model uses a 1/8" pneumatic port and a 10 mm piston rod.
Yes, the -S suffix denotes a built-in piston magnet, allowing you to mount CMSG, DMSG or EMSG switches for detection. It does not have an adjustable air cushion; instead, fixed TPU bumper pads decelerate the piston at the stroke ends. For adjustable cushioning, look at the MIC variant.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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