Airtac MI25~40 Stainless Steel Mini Cylinder MI40X175SR
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X175SR 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 MI40X175SR
Delivering 628.3 N of push force at 0.5 MPa, this double-acting round-body mini cylinder handles heavy-duty automation tasks. The stainless-steel barrel and Ø16 mm rod shrug off mild corrosion, making it superior to painted alternatives in damp washdown environments. It operates at 30-800 mm/s, utilizing a 1/4" port and M12x1.25 male rod thread.
The riveted construction keeps the unit compact, while fixed TPU bumper pads absorb stroke-end impacts to protect your machinery. Because the piston generates substantial thrust, plan for a safe working load of roughly 377 N rather than the absolute maximum. This translates to lifting about 32 kg vertically with a 2:1 safety margin, helping you match the actuator to real part weights.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X175SR Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X175SR |
|---|---|
| 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 MI40X175SR
| 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 MI40X175SR Is Used
Package Diverting
Provides the robust 628.3 N push force needed to pivot heavy cardboard cartons on a high-speed sorting line.
Press Fit Assembly
Drives small bushings into aluminum housings, relying on the fixed TPU bumpers to soften the 175 mm stroke impact.
Pallet Handling
Pushes loaded pallets into a wrapping station, where the stainless barrel withstands occasional moisture and washdown spray.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X175SR the Right Cylinder?
When sizing this 40 mm bore actuator, compare it against adjacent options: the Ø32 bore provides 402.2 N of push at 0.5 MPa, whereas this Ø40 model reaches 628.3 N. As the largest available MI bore, stepping up beyond this requires switching to an entirely different cylinder family. The 175 mm stroke is well within the 500 mm maximum, but ensure your mounting arrangement—such as an LB foot or FA flange—supports the rod to prevent side-load bending. The R back cover features an axial-in port, orienting the air supply directly along the cylinder axis for tight installations.
Remember that venting or centering the valve causes the piston to drift, as the fixed bumpers only decelerate the end of travel and act as neither a lock nor a brake. To suspend a load securely during air loss, integrate an external rod lock or a pilot-operated check valve into your circuit. Furthermore, the -S suffix indicates a built-in magnet, allowing you to attach CMSG, DMSG, or EMSG sensors for precise end-of-stroke detection.
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 MI40X175SR FAQ
This double-acting cylinder uses a 1/4" air port. 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.
The -S suffix means it has a built-in magnet for CMSG, DMSG, or EMSG switches. However, it does not hold position on air loss; the piston drifts. You must add an external rod lock or pilot check valve for secure load holding.
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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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