Airtac MI25~40 Stainless Steel Mini Cylinder MI25X350U
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI25X350U is a genuine double acting round-body mini air cylinder with a Ø25mm bore and 350mm 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
- Stroke350 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 MI25X350U
Delivering 245.3 N of push force at 0.5 MPa, this double-acting stainless-steel round-body mini cylinder handles robust linear motion tasks. The Ø25 mm bore operates on a 1/8" port, and the U-type back cover provides a 90-degree mounting orientation for compact installations. Its stainless barrel and piston rod resist mild corrosion, making it highly suitable for damp or washdown environments where painted steel alternatives would degrade.
Because the stroke extends to 350 mm, the Ø10 mm rod requires careful alignment to prevent side-loading and premature seal wear. Fixed TPU bumper pads absorb the impact at both stroke ends, though they only decelerate the piston rather than providing an adjustable cushion. Plan for a safe working load of about 147 N, which lets you lift a 12.5 kg part vertically with a 2:1 safety margin. Note that this specific SKU lacks a magnet, so it cannot host CMSG, DMSG or EMSG sensors without upgrading to the -S variant.
Airtac MI25~40 Stainless Steel Mini Cylinder MI25X350U Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI25X350U |
|---|---|
| Series | MI ISO 6432 mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 350 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 MI25X350U
| MI | ISO 6432 round-body mini cylinder (double-acting). |
|---|---|
| 25 | Bore size in mm. |
| ×350 | 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 MI25X350U Is Used
Package Diverting Gate
Actuates a 90-degree routing flap on a packaging line, using the U-type rear cover to hinge cleanly alongside the belt structure.
Vertical Carton Lift
Raises lightweight cardboard cartons weighing up to 12.5 kg to an upper tier, relying on the 245.3 N push force at 0.5 MPa for reliable elevation.
Lab Sample Ejection
Pushes prepared specimens out of a damp testing chamber, leveraging the stainless-steel construction to resist humidity and chemical exposure.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI25X350U the Right Cylinder?
When sizing this actuator, compare its 245.3 N push force at 0.5 MPa against the neighboring bores: a Ø20 mm bore provides 157.0 N, while a larger Ø32 mm bore offers 402.2 N. This model fits neatly in the middle for medium-duty tasks. The 350 mm stroke is well within the 500 mm maximum standard stroke for this bore, keeping the unit as a readily available configuration.
Keep in mind that a standard double-acting cylinder drifts if air pressure is lost or the control valve is centered, as the fixed bumpers only soften the end-of-stroke impact and act as neither a brake nor a lock. To suspend a load safely mid-stroke, you must integrate an external rod lock or a pilot-operated check valve into your pneumatic circuit. Furthermore, because this SKU ships without a magnet, position sensing is impossible unless you specify the -S version for switch readiness.
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 MI25X350U 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. The theoretical maximum force is 50 kgf at 1.0 MPa.
Yes, the Ø25 mm bore adheres to ISO 6432 mounting dimensions, allowing it to drop into standard mini-cylinder clevises and brackets. However, because this specific SKU lacks the -S magnet, it cannot accept CMSG, DMSG or EMSG magnetic switches.
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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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