Airtac MI25~40 Stainless Steel Mini Cylinder MI40X150SR
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X150SR 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 MI40X150SR
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 piston rod shrug off mild corrosion and washdown environments, outlasting painted-steel alternatives in damp facilities. A built-in piston magnet comes standard, enabling direct mounting of CMSG, DMSG, or EMSG electronic switches for precise end-of-stroke detection.
At 0.5 MPa, you can plan for a safe working load of roughly 377 N, which translates to lifting about 32 kg vertically with a 2:1 safety margin. The Ø40 bore uses a 1/4" port and an M12×1.25 male rod thread, while fixed TPU bumper pads absorb the impact at stroke end. The R back cover features an axial-in port orientation, keeping hose routing compact along the cylinder axis.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X150SR Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X150SR |
|---|---|
| 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 MI40X150SR
| 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 MI40X150SR Is Used
Heavy Package Diverter
Pushes heavy cartons weighing up to 32 kg off a main logistics conveyor line using the 150 mm stroke.
Washdown Gate Actuator
Operates stainless-steel process gates in damp food packaging facilities where mild corrosion resistance is essential.
Pallet Stopper Arm
Deploys a robust stopping barrier for loaded pallets, utilizing the 628.3 N push force to absorb kinetic impact safely.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X150SR the Right Cylinder?
When sizing this Ø40 bore, dropping down to the Ø32 model reduces the 0.5 MPa push force to 402.2 N, while no larger MI series option exists above it. This 150 mm stroke sits well within the 500 mm maximum standard limit, minimizing rod-bending side-load risks. If your mechanism must hold a vertical load when air is removed or the valve is centered, note that the piston will drift; the TPU pads only decelerate the stroke end and act as neither a lock nor a brake. You must integrate an external rod lock or a pilot-operated check valve for fail-safe holding.
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 MI40X150SR FAQ
This double-acting cylinder generates 628.3 N push and 527.8 N pull at 0.5 MPa, or 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. It features a 1/4" air port and a 150 mm stroke.
The -S suffix indicates a built-in magnet for mounting CMSG, DMSG, or EMSG switches. For load holding, the fixed TPU bumper pads only decelerate the stroke end and do not function as a brake; the piston will drift if air is lost, so an external rod lock or pilot check valve is required to hold a load.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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