Airtac MI25~40 Stainless Steel Mini Cylinder MI25X420SU
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI25X420SU is a genuine double acting round-body mini air cylinder with a Ø25mm bore and 420mm 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
- Stroke420 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 MI25X420SU
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 Ø25 mm bore uses a 1/8" port and a Ø10 mm piston rod with an M10x1.25 male thread. A 420 mm stroke falls well inside the 500 mm standard limit, providing ample travel for extending and retracting tasks. The riveted stainless barrel and rod naturally resist mild corrosion, giving it a real edge over painted alternatives in damp or washdown environments.
Because it carries the -S suffix, a built-in piston magnet enables position sensing with CMSG, DMSG or EMSG switches. Plan for about 147 N of actual work at 0.5 MPa to maintain a safe margin, which translates to lifting roughly 12.5 kg vertically. Fixed TPU bumper pads absorb the impact at stroke extremes without adding bulk. The rear U cover provides a 90-degree port orientation, simplifying hose routing in tight machinery.
Airtac MI25~40 Stainless Steel Mini Cylinder MI25X420SU Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI25X420SU |
|---|---|
| Series | MI ISO 6432 mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 420 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 MI25X420SU
| MI | ISO 6432 round-body mini cylinder (double-acting). |
|---|---|
| 25 | Bore size in mm. |
| ×420 | 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 MI25X420SU Is Used
Packaging Line Diverter
Pushes medium-weight cartons across a belt at 420 mm travel, using the 245 N thrust to redirect flow without stalling.
Damp Environment Gate
Operates an access panel in a humid washdown zone, relying on the stainless steel barrel to prevent mild corrosion.
Vertical Parts Lift
Raises lightweight plastic totes using the 90-degree U cover for tidy routing, safely lifting components under 12.5 kg.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI25X420SU the Right Cylinder?
When sizing this 25 mm bore, dropping down to a 20 mm cylinder reduces the 0.5 MPa push force to 157 N, while stepping up to a 32 mm bore yields 402 N. This model hits a strong middle ground for moderate loads. The 420 mm stroke demands careful attention to side loading; ensure the rod end is guided properly to prevent rod bending over that long extension. Furthermore, the standard ISO 6432 mounting interface means it drops directly into standard mini-cylinder brackets and clevises, easing design and spares replacement.
Remember that a plain double-acting cylinder drifts when air is lost or the valve is centered; the TPU bumpers only decelerate the stroke end and act as neither a lock nor a brake. If your application requires holding a vertical load securely in place during an air failure, install an external rod lock or a pilot-operated check valve in the line.
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 MI25X420SU FAQ
At 0.5 MPa it pushes with 245.3 N and pulls with 206.1 N. 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. The air port size is 1/8".
Yes, the -S suffix denotes a built-in piston magnet, allowing you to mount CMSG, DMSG or EMSG switches for precise end-of-stroke detection. It features fixed TPU bumper pads that decelerate the piston, but it does not have an adjustable air cushion.
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 MI25X420SU
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.