Airtac MI25~40 Stainless Steel Mini Cylinder MI40X50SCM
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X50SCM is a genuine double acting round-body mini air cylinder with a Ø40mm bore and 50mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke50 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 MI40X50SCM
Delivering 628.3 N of push force at 0.5 MPa, this double-acting stainless-steel round-body mini cylinder handles heavy-duty actuation where smaller bores stall. The Ø40 mm bore operates on a 1/4" port with a robust Ø16 mm piston rod, making it the largest in the MI family. It features a built-in piston magnet for position sensing and a CM round end cover. Fixed TPU bumper pads absorb stroke-end impact, and the rolled stainless construction resists mild corrosion in damp or washdown environments better than painted alternatives.
For real-world sizing, plan for a safe working load of about 377 N (roughly 60% of the 0.5 MPa rating) to account for friction and air losses. In vertical lifting scenarios, this translates to hoisting a 32 kg payload safely with a 2:1 margin. The 50 mm stroke is well within standard limits, keeping the compact riveted body light and rigid without introducing excessive rod bending moments.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X50SCM Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X50SCM |
|---|---|
| Series | MI mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 50 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 MI40X50SCM
| MI | round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×50 | 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 MI40X50SCM Is Used
Stamping Press Ejection
Provides the 628.3 N push force required to knock heavy stamped metal parts out of a die, utilizing the short 50 mm stroke for rapid, repetitive cycling.
Vertical Parts Press
Pushes a 32 kg assembly firmly into a machining fixture, leveraging the stainless steel barrel to resist coolant spray and shop floor moisture.
Heavy Package Divert
Actuates a heavy-duty routing gate on a packaging line, using the CM round end cover and 1/4" port to maintain stable airflow under high cycle rates.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X50SCM the Right Cylinder?
As the largest available bore, the MI40X50SCM sits at the top of the scaling ladder; if 628.3 N at 0.5 MPa is excessive, step down to the Ø32 bore which provides 402.2 N of push force. Because this is a non-ISO-6432 round-body size, ensure your mounting hardware matches the specific Ø40 dimensions rather than standard mini-cylinder brackets. The included -S magnet allows seamless integration of CMSG, DMSG, or EMSG reed and electronic sensors for end-of-stroke confirmation.
Remember that a standard double-acting cylinder drifts when air supply is lost or the valve is centered, as the TPU bumpers only decelerate the stroke end rather than locking the piston. If your application requires strict load holding on a vertical 32 kg lift, you must add an external pilot-operated check valve or a dedicated rod lock to prevent uncontrolled descent.
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 MI40X50SCM FAQ
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. This Ø40 bore utilizes a 1/4" air port and a Ø16 mm piston rod with an M12x1.25 male thread.
No, the fixed TPU bumper pads only decelerate the piston near the stroke end; they do not function as an adjustable air cushion or a braking lock. The piston will drift if air is lost, so an external rod lock or pilot check valve is required to hold a vertical load. The -S magnet allows CMSG, DMSG, and EMSG sensors to track position.
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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.
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Most inquiries answered within 7-8 hours.
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