Airtac MI25~40 Stainless Steel Mini Cylinder MI40X150SUSDB
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X150SUSDB is a genuine double acting round-body mini air cylinder with a Ø40mm bore and 150mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke150 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 MI40X150SUSDB
Delivering 628.3 N of push force at 0.5 MPa, this double-acting round-body mini cylinder handles heavy-duty actuation in compact spaces. The Ø40 bore operates on a 1/4" port and features a robust Ø16 piston rod with an M12x1.25 male thread. A built-in piston magnet (-S) supports CMSG, DMSG and EMSG switches for precise end-of-stroke detection. The U back cover provides a 90-degree port orientation, while the included SDB pivot-block simplifies mounting alignment.
The stainless-steel barrel and rod resist mild corrosion, making it superior to painted alternatives in damp or washdown environments. Fixed TPU bumper pads absorb impact energy at the stroke ends to protect internal components. For practical sizing, plan for a safe working load of about 377 N, which translates to lifting roughly 32 kg vertically with a 2:1 safety margin.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X150SUSDB Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X150SUSDB |
|---|---|
| Series | MI mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 150 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 MI40X150SUSDB
| MI | round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×150 | 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 MI40X150SUSDB Is Used
Stamping Press Ejection
Uses the 879.6 N push force at 0.7 MPa to knock heavy stamped metal parts out of a die reliably on automated lines.
Package Diverting
Leverages the 150 mm stroke and SDB pivot mount to push heavy cartons off a main conveyor belt onto a sorting branch.
Pallet Stop Gate
Acts as a robust pneumatic stop for loaded pallets on roller conveyors, utilizing the 32 kg safe vertical lift capacity.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X150SUSDB the Right Cylinder?
As the largest bore in the MI series, the Ø40 offers maximum output with a theoretical limit of 128.1 kgf at 1.0 MPa. If this 628.3 N push at 0.5 MPa exceeds your requirement, stepping down to the Ø32 bore reduces the force to 402.2 N while saving space; no larger standard MI bore exists. The 150 mm stroke is well within the 500 mm maximum, keeping the assembly rigid, though you should still minimize side loads to prevent rod bending. The SDB pivot-block accessory accommodates angular misalignment during operation.
Remember that the fixed TPU bumpers only decelerate the piston near the stroke end and do not function as a brake. If air pressure drops or the valve is centered, the rod will drift and cannot maintain a vertical load. To secure a suspended weight safely, 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 MI40X150SUSDB FAQ
This double-acting cylinder uses a 1/4" air port. At 0.5 MPa it provides 628.3 N push and 527.8 N pull. At 0.7 MPa it provides 879.6 N push and 738.9 N pull. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
No, the fixed TPU bumper pads only decelerate the piston at the stroke ends and do not act as a locking brake. If air is lost, the rod will drift. You must use an external rod lock or pilot check valve to hold a suspended load safely.
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1-Year Warranty
Covers non-human-caused product damage.
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