Airtac MI25~40 Stainless Steel Mini Cylinder MI40X150SU
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X150SU 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 MI40X150SU
Delivering 628.3 N of push force at 0.5 MPa, the AirTAC MI40X150SU is a robust round-body mini cylinder built for heavy-duty compact automation. The stainless-steel barrel and piston rod provide excellent mild corrosion resistance, making it highly suitable for damp environments or washdown areas where painted steel alternatives would degrade. A 1/4" port supplies the 40 mm bore, driving a 16 mm rod with an M12x1.25 male thread. Because this SKU includes the -S magnet, it is fully ready for CMSG, DMSG, or EMSG position switches.
The riveted construction keeps the unit compact while fixed TPU bumper pads absorb impact energy at the stroke ends. For practical sizing, plan for a safe working load of about 377 N, which equates to lifting roughly 32 kg vertically with a 2:1 safety margin. The U back cover provides a 90-degree port and mounting orientation, easing integration into tight machinery layouts.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X150SU Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X150SU |
|---|---|
| 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 MI40X150SU
| 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 MI40X150SU Is Used
Heavy Clamping Stations
Generates 628.3 N of push force at 0.5 MPa to secure heavy metal castings during CNC machining operations.
Pallet Diverters
Uses the 150 mm stroke and 32 kg safe vertical lift capacity to positively redirect heavy product pallets on packaging lines.
Washdown Sorting Gates
The stainless steel rod and barrel withstand damp food-processing environments while routing items at high speed.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X150SU the Right Cylinder?
As the largest bore in the MI series, the MI40X150SU sits at the top of the range with no larger standard size available. If 628.3 N of push at 0.5 MPa is excessive, stepping down to the 32 mm bore yields 402.2 N, which may suffice for lighter fixtures. This 150 mm stroke is well within the 500 mm maximum, though side loads should still be minimized to prevent rod bending over the travel distance. Remember that the fixed TPU bumpers only decelerate the piston near the stroke end; they do not function as a lock. If your application must hold a vertical load when air pressure drops or the valve is centered, you must add an external rod lock or a pilot-operated check valve to prevent drifting.
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 MI40X150SU FAQ
The 40 mm bore 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. Air is supplied through a 1/4" port.
No, the base MI uses fixed TPU bumper pads that decelerate the piston at the stroke ends but cannot be adjusted. For adjustable air cushioning, you would need the MIC variant. This model does include a magnet (-S) for CMSG, DMSG, or EMSG sensors.
Authorized Export Seller
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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