Airtac MI25~40 Stainless Steel Mini Cylinder MI25X400SCALB
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI25X400SCALB 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 MI25X400SCALB
Generating 245.3 N of push force at 0.5 MPa, this double-acting stainless-steel round-body mini cylinder handles demanding 400 mm reach tasks. The Ø25 bore conforms to ISO 6432 mounting dimensions, dropping directly into standard mini-cylinder brackets and clevises for easy design swaps. Its stainless barrel and piston rod naturally resist mild corrosion, giving it a real edge over painted-steel or aluminium minis in damp, food, or outdoor environments. Because the code includes an S, a built-in piston magnet is present, allowing you to fit CMSG, DMSG or EMSG reed or electronic switches for position sensing.
At 0.5 MPa you can plan for a safe working load of about 147 N of real work, rather than relying on the absolute maximum rating. For vertical lifting, that same 245.3 N push force equates to roughly 25 kg, so halving it for a 2:1 safety margin means you can reliably lift parts around 12.5 kg. The 1/8" port supplies air to drive the 30-800 mm/s speed range, while fixed TPU bumper pads decelerate the piston at the stroke ends. This CA back cover variant features a rear pivot clevis, and the LB foot bracket supports the body for long-stroke stability.
Airtac MI25~40 Stainless Steel Mini Cylinder MI25X400SCALB Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI25X400SCALB |
|---|---|
| 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 MI25X400SCALB
| 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 MI25X400SCALB Is Used
Diverting Heavy Packages
Uses the 245.3 N push at 0.5 MPa to push heavier cartons across a transfer station on a packaging line, with the LB foot bracket holding the 400 mm stroke steady.
Damp Washdown Gate
The stainless steel barrel and rod resist mild corrosion in a food processing plant, operating a washdown flap gate where painted steel would degrade.
Vertical Parts Lift
Lifts approximately 12.5 kg bins vertically between conveyor tiers using the 400 mm stroke, relying on the CA pivot clevis to accommodate slight angular misalignment.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI25X400SCALB the Right Cylinder?
When sizing this 400 mm stroke unit, check both neighbours: the Ø20 bore provides 157.0 N of push at 0.5 MPa, while the larger Ø32 bore offers 402.2 N. If your application requires true adjustable air cushioning rather than fixed TPU bumpers to absorb high-speed kinetic energy, step up to the MIC variant. The included LB foot mounting combined with the CA rear clevis gives you versatile pivot and base mounting options, which is especially helpful over a 400 mm stroke to prevent rod bending and side-load issues.
Remember that a standard double-acting cylinder drifts when air is lost or the valve is centred—the bumper pads only soften the end of travel and act as neither a lock nor a brake. If your mechanism must hold a vertical load securely during an air failure, install an external rod lock or a pilot-operated check valve. The -S magnet enables position sensing, and the 1/8" port ensures adequate flow for the bore.
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 MI25X400SCALB FAQ
This Ø25 bore double-acting cylinder has 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, 343.4 N push and 288.5 N pull at 0.7 MPa, with a theoretical maximum force of 50 kgf at 1.0 MPa.
No, the fixed TPU bumper pads only decelerate the piston at the stroke end; they do not lock or hold the load. If air is lost, the piston will drift. For vertical load holding, 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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