Airtac MI25~40 Stainless Steel Mini Cylinder MI40X175R
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X175R 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 MI40X175R
Delivering 628.3 N of push force at 0.5 MPa, the AirTAC MI40X175R is a robust double-acting round-body mini cylinder built for demanding automation. Its stainless-steel barrel and Ø16 mm rod shrug off mild corrosion, making it highly suitable for damp washdown environments where painted steel or aluminium bodies degrade. The 175 mm stroke operates at speeds between 30-800 mm/s, decelerating smoothly via fixed TPU bumper pads at both ends.
This specific configuration includes an R back cover, meaning the 1/4 inch air port enters axially straight out of the rear cap for inline plumbing. Because it lacks the -S suffix, this SKU cannot host CMSG, DMSG or EMSG magnetic switches. For real-world sizing, plan for roughly 377 N of actual work at 0.5 MPa to maintain a safe margin, which translates to lifting about 32 kg vertically before applying a 2:1 safety factor.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X175R Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X175R |
|---|---|
| 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 MI40X175R
| 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 MI40X175R Is Used
Heavy Carton Diversion
Uses the 628.3 N push force to deflect heavy filled cartons on a packaging line without bogging down.
Bottle Press Capper
Lowers a capping head 175 mm to press caps onto containers, relying on the R axial port to keep plumbing tight against the machine frame.
Washdown Gate Actuator
Opens and closes heavy stainless diversion gates in food processing zones where the corrosion-resistant barrel survives daily water spray.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X175R the Right Cylinder?
As the largest bore in the MI family, the Ø40 sits at the top of the range with no larger standard size available; if your application requires less force, stepping down to the Ø32 bore drops the 0.5 MPa push force to 402.2 N. The 175 mm stroke is well within the 500 mm maximum standard limit, keeping it as a readily available configuration. With a 1/4 inch port and M12x1.25 male rod thread, it handles substantial airflow and heavy mounting loads.
Remember that the fixed TPU bumpers only soften the end-of-stroke impact; they do not function as a brake. If your system loses air or the directional valve is centred, the piston will drift, so you must integrate an external rod lock or a pilot-operated check valve to suspend any vertical load 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 MI40X175R FAQ
At 0.5 MPa this double-acting cylinder pushes with 628.3 N and pulls with 527.8 N. Increasing pressure to 0.7 MPa yields 879.6 N push and 738.9 N pull. The theoretical maximum force is 128.1 kgf at 1.0 MPa. It uses a 1/4 inch air port.
No, this specific SKU lacks the internal magnet required for switches. You must purchase the -S variant (MI40X175R-S) to use CMSG, DMSG or EMSG sensors. Additionally, the fixed TPU bumper pads only decelerate the stroke end and will not hold a load if air pressure drops.
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