Airtac MI25~40 Stainless Steel Mini Cylinder MI40X350CM
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X350CM 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 MI40X350CM
Delivering 628.3 N of push force at 0.5 MPa, this double-acting round-body mini cylinder handles heavy-duty actuation tasks. The stainless-steel barrel and Ø16 mm rod shrug off mild corrosion and washdown environments better than painted alternatives. A 1/4" port supplies air to drive the 350 mm stroke, while fixed TPU pads absorb impact energy at the travel ends.
For practical sizing, plan for a safe working load of about 377 N, which is roughly 60 percent of the 0.5 MPa rating. This translates to lifting a 32 kg mass vertically with a 2:1 safety margin. The CM round end back cover provides a compact rear profile for straightforward mounting in tight machinery cavities.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X350CM Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X350CM |
|---|---|
| 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 MI40X350CM
| 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 MI40X350CM Is Used
Pallet Diverters
Pushes heavy wooden pallets across transfer lines using its 628.3 N thrust, while the stainless build withstands dusty warehouse environments.
Case Erectors
Deploys the 350 mm stroke to fold large corrugated cardboard cartons, relying on the CM round end cover for flush rear machine framing.
Stamping Ejectors
Knocks pressed metal parts out of dies, utilizing the fixed TPU pads to absorb repeated high-energy impacts at 0.7 MPa operating pressure.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X350CM the Right Cylinder?
When sizing this 40 mm bore, compare its 628.3 N push force at 0.5 MPa against the smaller Ø32 bore, which outputs 402.2 N. There is no larger standard MI bore available, so for forces exceeding this class, consider a different cylinder family entirely. Because this 350 mm stroke is relatively long, verify your mounting arrangement to prevent rod bending under side loads.
This specific SKU lacks the -S magnet, meaning it cannot accept CMSG, DMSG or EMSG position switches; add the -S variant if your control system requires electronic end-of-stroke detection. Furthermore, the fixed TPU bumpers only decelerate the piston near the end caps—they do not function as an adjustable air cushion. If air pressure drops or the valve centers, the piston will drift, so install an external pilot check valve or rod lock to suspend loads safely.
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 MI40X350CM FAQ
This 40 mm bore cylinder features a 1/4" port and a M12x1.25 male rod thread. It generates 628.3 N push and 527.8 N pull at 0.5 MPa, 879.6 N push and 738.9 N pull at 0.7 MPa, with a theoretical maximum of 128.1 kgf at 1.0 MPa.
No, this specific SKU does not include the -S magnet option, so it cannot accept CMSG, DMSG or EMSG switches. You must select an MI40 variant with the -S suffix if your application requires electronic position sensing.
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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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