Airtac MI25~40 Stainless Steel Mini Cylinder MI32X400SR
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI32X400SR is a genuine double acting round-body mini air cylinder with a Ø32mm bore and 400mm stroke, 1/8" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ32 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 MI32X400SR
Delivering 402.2 N of push force at 0.5 MPa, this double-acting round-body mini cylinder handles substantial workloads within a compact footprint. The stainless-steel barrel and piston rod supply reliable mild-corrosion resistance, making it well-suited for damp production areas where painted steel or aluminium bodies degrade. A 1/8" port feeds the 32 mm bore to cycle the rod across a 400 mm stroke.
Because the bumper pads only decelerate the stroke end rather than locking the rod, plan for roughly 241 N of actual work at 0.5 MPa to maintain a safe margin. This translates to lifting about 20.5 kg vertically against gravity. The riveted construction keeps the unit light, and the -S suffix denotes a built-in piston magnet for position sensing.
Airtac MI25~40 Stainless Steel Mini Cylinder MI32X400SR Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI32X400SR |
|---|---|
| Series | MI mini cylinder |
| Bore size | Ø32 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. Note: the Ø32 bore is a larger, non-ISO-6432 size.
Theoretical Output Force (Ø32mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | 484 N |
| Max (@1.0 MPa) | 82 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 MI32X400SR
| MI | round-body mini cylinder (double-acting). |
|---|---|
| 32 | 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 MI32X400SR Is Used
Carton Push-off Diverter
Uses the 402.2 N push force at 0.5 MPa to shove heavy cardboard cartons from a main packaging conveyor onto a secondary routing lane.
Pneumatic Rivet Press
Drives a 400 mm stroke to lower a riveting head deep into an assembly jig, relying on the fixed TPU pads to absorb the impact at the working end.
Pallet Component Staging
Extends to push metal brackets from a machining cell onto a lower-level pallet, taking advantage of the stainless build to resist coolant mist.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI32X400SR the Right Cylinder?
When sizing this 32 mm bore, stepping down to a 25 mm cylinder drops the 0.5 MPa push force to 245.3 N, while stepping up to a 40 mm bore increases it to 628.3 N. If your process loses air or the valve centres, the piston will drift and drop the load—the fixed TPU bumpers only soften the end-of-stroke impact and act neither as a brake nor a lock. To suspend a load safely, integrate an external rod lock or a pilot-operated check valve.
The R back cover configures the port for axial-in orientation, streamlining hose routing along the cylinder axis. You can pair the internal magnet with CMSG, DMSG, or EMSG switches for precise end-position detection. Across a 400 mm stroke, minimize side-loading to prevent rod bending and premature seal wear.
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 MI32X400SR FAQ
This 32 mm bore cylinder features a 1/8" port and a M10x1.25 male rod thread. It generates 402.2 N push and 345.6 N pull at 0.5 MPa, 563 N push and 483.8 N pull at 0.7 MPa, with a theoretical maximum of 82 kgf at 1.0 MPa.
No, the piston will drift if air is lost or the valve is centred. The fixed TPU bumper pads only decelerate the stroke end and do not function as a locking brake. To hold a vertical load, you must add an external rod lock or a pilot-operated check valve.
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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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Most inquiries answered within 7-8 hours.
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