Airtac MI25~40 Stainless Steel Mini Cylinder MI40X175U
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X175U is a genuine double acting round-body mini air cylinder with a Ø40mm bore and 175mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke175 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 MI40X175U
Delivering 628.3 N of push force at 0.5 MPa, this double-acting round-body mini cylinder handles heavy-duty actuation where smaller bores stall. The stainless-steel barrel and Ø16 mm rod shrug off mild corrosion, making it a durable choice for damp or washdown environments compared to painted alternatives. Because this SKU lacks the -S magnet, it cannot host CMSG, DMSG or EMSG position switches. The riveted construction keeps the unit compact, while fixed TPU bumper pads absorb the impact at stroke extremes without offering adjustable cushioning. Plan for a safe working load of roughly 377 N, which equates to lifting about 32 kg vertically with a 2:1 safety margin. A 1/4" port supplies air, and the U back cover provides a 90-degree mounting interface for tight spatial constraints.
Operating between 0.15 and 1.0 MPa, the unit travels its 175 mm stroke at speeds of 30-800 mm/s. Note that Ø40 falls outside the ISO 6432 mounting standard, so it functions strictly as a robust round-body solution rather than a dimensionally interchangeable mini cylinder. The male M12x1.25 rod thread ensures a solid mechanical connection for your tooling.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X175U Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X175U |
|---|---|
| Series | MI mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 175 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 MI40X175U
| MI | round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×175 | 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 MI40X175U Is Used
Pallet Diverter Gate
Shifts heavy timber pallets on a packaging line using the full 628.3 N push force, with the 90-degree U cover fitting neatly into the conveyor frame.
Stamping Press Feed
Pushes thick gauge metal blanks into a mechanical press, leveraging the 175 mm stroke and fixed TPU pads to absorb repeated high-mass end-of-stroke impacts.
Carton Stack Separator
Separates bonded stacks of filled beverage cartons in a humid bottling hall, where the stainless barrel prevents mild corrosion from daily washdowns.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X175U the Right Cylinder?
If the 628.3 N push at 0.5 MPa is excessive for your payload, step down to the Ø32 bore, which provides 402.2 N; as Ø40 is the largest available in this series, moving up requires evaluating a different body style entirely. The 175 mm stroke is well within the 500 mm maximum standard limit, keeping the rod bending risk low, though side-load alignment should always be verified. Because this configuration uses the U back cover, ensure your frame accommodates the 90-degree port and mounting orientation. Remember that venting air or centering the directional valve will cause the piston to drift, as the TPU bumpers only decelerate the end of stroke and do not function as a brake. To suspend a load safely mid-stroke, 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 MI40X175U FAQ
This 40 mm bore cylinder uses a 1/4" air port and a 16 mm rod. At 0.5 MPa it pushes with 628.3 N and pulls with 527.8 N. At 0.7 MPa the push increases to 879.6 N and the pull to 738.9 N. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
No, this specific SKU does not include the -S magnet, so CMSG, DMSG and EMSG switches will not function on it. You would need the -S variant to enable magnetic sensing. The unit relies on fixed TPU bumper pads for end-of-stroke deceleration rather than an adjustable air cushion.
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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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