Airtac MI25~40 Stainless Steel Mini Cylinder MI40X700SU
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X700SU is a genuine double acting round-body mini air cylinder with a Ø40mm bore and 700mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke700 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 MI40X700SU
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 rod shrug off mild corrosion and washdown environments better than painted alternatives. A 700 mm stroke makes this a non-standard, made-to-order configuration, extending past the 500 mm standard maximum to reach distant workpieces.
The riveted construction keeps the unit compact, while fixed TPU bumper pads absorb end-of-stroke impact without offering adjustable cushioning. For position feedback, the integrated -S magnet supports CMSG, DMSG, or EMSG switches. Plan for roughly 377 N of usable work at 0.5 MPa, which translates to lifting about 32 kg vertically with a 2:1 safety margin. Air connects via a 1/4 inch port, and the U back cover provides a 90-degree mounting orientation.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X700SU Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X700SU |
|---|---|
| Series | MI mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 700 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 MI40X700SU
| MI | round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×700 | 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 MI40X700SU Is Used
Pallet Diverters
Pushes heavy pallets across transfer lines using 628.3 N of thrust, with the 700 mm stroke reaching across wide belt gaps.
Vertical Package Gates
Lifts or redirects parcels up to 32 kg on sorting conveyors, relying on the stainless rod for reliable washdown resistance.
Long-Reach Blanking
Actuates safety gates or heavy press blanks at a distance, using the 90-degree U cover to keep the footprint tight.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X700SU the Right Cylinder?
Selecting this 40 mm bore provides maximum thrust in the MI family, pushing 628.3 N at 0.5 MPa. If your application only requires 402.2 N, stepping down to a Ø32 bore saves space and air volume; no larger AirTAC MI bore exists. Because the 700 mm stroke exceeds the 500 mm standard limit, it is manufactured to order, and the extended rod requires careful alignment to prevent bending under side loads.
The U rear cover simplifies 90-degree mounting, but remember this cylinder drifts if air pressure drops or the valve centers—the TPU bumpers only decelerate the stroke end and act as neither a brake nor a position lock. For suspended loads, install an external rod lock or pilot check valve. The -S magnet enables electronic or reed sensors, and you can pair it with LB foot or FA flange brackets.
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 MI40X700SU FAQ
At 0.5 MPa it pushes 628.3 N and pulls 527.8 N. At 0.7 MPa it pushes 879.6 N and pulls 738.9 N. The theoretical maximum force is 128.1 kgf at 1.0 MPa. It uses a 1/4 inch air port and a Ø16 mm rod with an M12x1.25 male thread.
No, the piston drifts if air is lost or the valve centers, as the fixed TPU bumper pads only decelerate the stroke end rather than locking the load. For suspended loads, use an external rod lock or pilot check valve. It is also a non-standard 700 mm stroke, exceeding the 500 mm standard maximum.
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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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