Airtac MI25~40 Stainless Steel Mini Cylinder MI25X400CM
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI25X400CM is a genuine double acting round-body mini air cylinder with a Ø25mm bore and 400mm 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
- Stroke400 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 MI25X400CM
Generating 245.3 N of push force at 0.5 MPa, this double-acting round-body mini cylinder handles substantial work across a 400 mm travel distance. The stainless-steel barrel and piston rod supply mild corrosion resistance, making it highly suitable for damp production zones where painted steel or aluminium bodies degrade. Its Ø25 mm bore conforms to ISO 6432 mounting dimensions, allowing a direct drop into standard mini-cylinder brackets and clevises without custom hardware. Fixed TPU bumper pads absorb the impact at both stroke ends, decelerating the motion smoothly.
Because the 400 mm travel creates a long lever arm, keeping side-loads minimal protects the rod from bending. Plan for a real working load of roughly 147 N, which is about 60 percent of the 0.5 MPa push rating. Vertically, it lifts around 12.5 kg safely when applying a 2:1 margin against gravity. The CM round end back cover provides a clean rear profile, while the 1/8 inch port ensures adequate airflow for the 30-800 mm/s speed range.
Airtac MI25~40 Stainless Steel Mini Cylinder MI25X400CM Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI25X400CM |
|---|---|
| Series | MI ISO 6432 mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 400 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 MI25X400CM
| MI | ISO 6432 round-body mini cylinder (double-acting). |
|---|---|
| 25 | Bore size in mm. |
| ×400 | 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 MI25X400CM Is Used
Pallet Diverters
Pushes heavy timber pallets sideways on a packaging line using the 245.3 N push force available at 0.5 MPa.
Vertical Crate Lifter
Raises loaded crates weighing up to 12.5 kg through a 400 mm vertical cycle, benefiting from the stainless build in humid cool-rooms.
Press Ejector
Ejects formed metal parts from a hydraulic press over a long 400 mm reach, relying on fixed TPU pads to absorb the stroke-end impact.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI25X400CM the Right Cylinder?
When sizing this 25 mm bore, compare your actual load against the 245.3 N push at 0.5 MPa. If you need less force, the Ø20 bore provides 157 N, or you can step up to the Ø32 bore for 402 N. This CM round-end version lacks the -S magnet, meaning it cannot accept CMSG, DMSG or EMSG sensors for position detection; you would need the -S variant for switch mounting. For mounting flexibility, the series supports LB foot, FA flange, SDB pivot and TC trunnion brackets.
With a 400 mm stroke, rod bending under side-loads becomes a real concern, so ensure rigid guidance on the payload. Note that this cylinder does not hold its position if air pressure drops or the valve is centred, as the piston will drift. The fixed TPU bumpers only soften the end-of-stroke impact, never acting as a brake. Use an external rod lock or a pilot-operated check valve if you must arrest downward drift.
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 MI25X400CM FAQ
The 25 mm bore generates 245.3 N push and 206.1 N pull at 0.5 MPa, or 343.4 N push and 288.5 N pull at 0.7 MPa. The theoretical maximum force is 50 kgf at 1.0 MPa. It uses a 1/8 inch air port and a 10 mm piston rod with an M10x1.25 male thread.
No, this specific SKU lacks the internal magnet required for switches. You must select the -S variant to mount CMSG, DMSG or EMSG sensors. The cylinder uses ISO 6432 mounting dimensions and features a CM round end back cover.
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