Airtac MI25~40 Stainless Steel Mini Cylinder MI40X10U
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X10U is a genuine double acting round-body mini air cylinder with a Ø40mm bore and 10mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke10 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 MI40X10U
Delivering substantial clamping power in a compact footprint, the AirTAC MI40X10U is a double-acting round-body mini cylinder engineered for heavy-duty miniature actuation. Built with a stainless-steel barrel and a 16mm piston rod, it generates 628.3 N of push force and 527.8 N of pull force at 0.5 MPa. The 10mm stroke is ideal for short, powerful movements, while the U-type back cover provides a 90-degree port and mounting orientation for tight machinery layouts.
The riveted stainless construction resists mild corrosion and washdowns better than painted alternatives, making it suitable for damp production floors. Because this SKU lacks the -S magnet, it cannot host CMSG, DMSG, or EMSG reed switches. Fixed TPU bumper pads absorb the stroke-end impact, and the 1/4" pneumatic port handles the higher airflow required for this 40mm bore. Plan for roughly 377 N of actual work at 0.5 MPa, which translates to lifting about 32 kg vertically with a safe 2:1 margin.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X10U Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X10U |
|---|---|
| Series | MI mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 10 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 MI40X10U
| MI | round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×10 | 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 MI40X10U Is Used
Heavy-Duty Short-Stroke Clamping
Secures thick steel plates in a robotic welding cell, using the 628.3 N push force at 0.5 MPa to hold parts rigidly against a fixture without deflection.
Pneumatic Riveting Press
Drives solid rivets into heavy-gauge aluminum brackets, leveraging the 10mm stroke and 879.6 N push force at 0.7 MPa for rapid, high-impact forming.
Meat Processing Gate Latch
Actuates a heavy stainless-steel safety gate on a washdown line, where the corrosion-resistant barrel survives daily high-pressure cleaning and harsh detergents.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X10U the Right Cylinder?
Choosing this 40mm bore makes sense when a 32mm cylinder (providing 402.2 N push at 0.5 MPa) lacks the necessary muscle, as the MI40X10U jumps to 628.3 N. There is no larger standard MI bore, so for forces beyond this, you must look outside the mini-cylinder range. The 10mm stroke keeps the rod fully supported, minimizing side-load and rod-bending risks even under high shock loads.
Remember that the fixed TPU bumpers only decelerate the piston near the stroke end; they do not function as a lock. If your process requires the rod to stay put when air pressure drops or the valve is centered, you must add an external pilot-operated check valve or a dedicated rod lock, as the piston will drift otherwise.
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 MI40X10U FAQ
This 40mm bore cylinder features a 1/4" pneumatic port and an M12x1.25 male rod thread. It delivers 628.3 N push and 527.8 N pull at 0.5 MPa, 879.6 N push and 738.9 N pull at 0.7 MPa, with a theoretical maximum force of 128.1 kgf at 1.0 MPa.
No, this specific SKU does not include a magnet, so it cannot host CMSG, DMSG, or EMSG switches. You would need the -S variant of this round-body mini cylinder to enable magnetic sensing. The U-type back cover provides a 90-degree mounting interface for spatial flexibility.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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