Airtac MI25~40 Stainless Steel Mini Cylinder MI40X25SCMTC
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X25SCMTC is a genuine double acting round-body mini air cylinder with a Ø40mm bore and 25mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke25 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 MI40X25SCMTC
Delivering serious thrust in a compact footprint, this double-acting round-body mini cylinder generates 628.3 N of push force at 0.5 MPa. The stainless-steel barrel and Ø16 mm rod shrug off mild corrosion, making it highly reliable for damp washdown environments where painted steel quickly degrades. Riveted construction keeps the body light, while fixed TPU bumper pads absorb the impact at stroke end.
For real-world sizing, plan for a safe working load of roughly 377 N, which is about 60 percent of the 0.5 MPa rating. In vertical lift setups, this translates to hoisting approximately 32 kg safely with a 2:1 margin. The 1/4" port feeds air rapidly to maintain the 30-800 mm/s speed range, and the built-in magnet supports CMSG, DMSG, and EMSG switches for position sensing.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X25SCMTC Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X25SCMTC |
|---|---|
| Series | MI mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 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 MI40X25SCMTC
| MI | round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×25 | 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 MI40X25SCMTC Is Used
Stamping Pin Press
Uses the 628.3 N push force to drive marking pins into aluminum tags on an automated packaging line.
Heavy Diverter Gate
Swings a robust steel guide on a conveyor using the TC trunnion to pivot heavy packages smoothly.
Pallet Stopper Arm
Deploys a 25 mm stroke blocking lug to halt loaded pallets, relying on the stainless build for dusty settings.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X25SCMTC the Right Cylinder?
If 628.3 N at 0.5 MPa is more power than your application requires, the Ø32 bore offers 402.2 N of push force as a smaller alternative. Since this is the largest available standard MI bore, moving up in force would require a different cylinder series entirely. The CM round end back cover pairs seamlessly with the TC trunnion mount to handle pivot requirements.
Because the stroke is a short 25 mm, side-load stress on the rod is minimal, but you must account for gravity. A standard double-acting cylinder drifts when air pressure drops or the valve is centered, as the TPU bumpers only decelerate the stroke end without locking the piston. To prevent a suspended 32 kg load from falling, 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 MI40X25SCMTC FAQ
This 40 mm bore cylinder features a 1/4" air port and an M12x1.25 male rod thread. It generates 628.3 N push and 527.8 N pull at 0.5 MPa, increasing to 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.
No, the piston will drift downward if air is lost or the valve is centered, as the fixed TPU bumper pads only decelerate the rod near the stroke end without acting as a brake. To suspend a load safely, you must add an external rod lock or a pilot-operated check valve. The built-in magnet allows CMSG, DMSG, and EMSG sensors to track position.
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Genuine AirTAC parts produced by AirTAC factory.
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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