Airtac MI25~40 Stainless Steel Mini Cylinder MI40X350SCM
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X350SCM is a genuine double acting round-body mini air cylinder with a Ø40mm bore and 350mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke350 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- 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 MI40X350SCM
Delivering 628.3 N of push force at 0.5 MPa, this double-acting round-body mini cylinder handles substantial work within a compact riveted stainless-steel form. The Ø40 bore operates on a 1/4" port with a Ø16 piston rod, yielding a theoretical maximum output of 128.1 kgf at 1.0 MPa. Because the barrel and rod are stainless, the unit resists mild corrosion and washdown better than painted alternatives in damp or outdoor settings. The built-in magnet (-S) directly supports CMSG, DMSG and EMSG switches for position detection.
For practical sizing, plan for about 377 N of real work at 0.5 MPa, which safely lifts roughly 32 kg vertically with a 2:1 margin. The CM round end cover provides a clean rear profile, while fixed TPU bumper pads absorb the impact at stroke extremes without offering adjustable cushioning. This 350 mm stroke is well within the 500 mm maximum standard for this bore size.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X350SCM Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X350SCM |
|---|---|
| Series | MI mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 350 mm |
| Acting type | Double acting |
| Port size | 1/4" |
| Rod thread | M12×1.25 |
| 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 Ø40 bore is a larger, non-ISO-6432 size.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | 739 N |
| Max (@1.0 MPa) | 128 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 MI40X350SCM
| MI | round-body mini cylinder (double-acting). |
|---|---|
| 40 | 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 MI40X350SCM Is Used
Heavy Carton Diverter
Pushes heavy corrugated cartons across a main conveyor belt using its 628.3 N push force, with the CMSG sensor confirming the full 350 mm extension.
Washdown Gate Actuator
Operates a stainless-steel diversion flap in a food processing facility, leveraging the corrosion-resistant barrel and CM round end to withstand daily washdowns.
Pallet Component Sorter
Lifts and lowers 30 kg metal pallet fixtures vertically, staying safely within the calculated 32 kg vertical lift capacity at 0.5 MPa.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X350SCM the Right Cylinder?
When sizing this actuator, compare its 628.3 N push force at 0.5 MPa against the smaller Ø32 bore, which provides 402.2 N under the same pressure. If your application requires even more power, note that the Ø40 is the largest available MI series size, so higher forces would require a different cylinder family entirely. The 350 mm stroke demands careful alignment to prevent rod bending under side loads. Although the fixed TPU bumpers decelerate the piston at the end caps, they do not function as a brake; if air pressure drops or the valve is centred, the piston will drift. To maintain vertical position, integrate an external rod lock or a pilot-operated check valve into your pneumatic circuit.
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 MI40X350SCM FAQ
This double-acting actuator uses a 1/4" port and generates 628.3 N push and 527.8 N pull at 0.5 MPa, or 879.6 N push and 738.9 N pull at 0.7 MPa. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
The -S suffix indicates a built-in piston magnet, allowing you to mount CMSG, DMSG or EMSG electronic switches along the groove. For cushioning, it relies on fixed TPU bumper pads to decelerate the stroke end; it does not feature adjustable air cushioning, which is found on the MIC variant.
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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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