Airtac MI25~40 Stainless Steel Mini Cylinder MI40X80CM
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X80CM is a genuine double acting round-body mini air cylinder with a Ø40mm bore and 80mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke80 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 MI40X80CM
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, outlasting painted alternatives in damp or outdoor settings. Riveted construction keeps the unit compact, while fixed TPU bumper pads absorb stroke-end impact. The CM round end cover streamlines the rear profile for straightforward port orientation.
Plan for roughly 377 N of real work at 0.5 MPa to maintain a safe margin, which translates to lifting about 32 kg vertically under a 2:1 safety factor. Air flows through a 1/4 inch port to drive the 80 mm stroke at 30-800 mm/s. Because this SKU lacks a magnet, it cannot host CMSG, DMSG or EMSG sensors; specify an -S variant if position feedback is required.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X80CM Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X80CM |
|---|---|
| Series | MI mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 80 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 MI40X80CM
| MI | round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×80 | 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 MI40X80CM Is Used
Stamping Press Ejection
Kicks heavy stamped metal parts out of a 40-ton press bed using 628.3 N of push force at 0.5 MPa, ensuring reliable clearance before the next cycle.
Pallet Divider Actuation
Deploys an 80 mm stroke to lift and position dense cardboard pallet dividers in packaging lines, where the stainless body resists daily washdown.
Heavy Carton Diversion
Pushes loaded shipping cartons across a transfer belt, utilizing the 32 kg vertical lift equivalent to manage substantial package weights.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X80CM the Right Cylinder?
As the largest bore in the series, there is no larger standard MI to step up to if 628.3 N at 0.5 MPa proves insufficient, so you would need to explore alternative series for higher force. Stepping down, the Ø32 bore provides 402.2 N of push force, making this Ø40 model the correct choice only when that lower capacity is inadequate. The M12x1.25 male rod thread handles the higher mechanical loads, and the CM round end cover dictates a specific rear mounting footprint.
Remember that venting air or centering the control valve causes the piston to drift, as the fixed TPU bumpers only decelerate the stroke end rather than locking the rod. To suspend a vertical load safely, integrate an external rod lock or a pilot-operated check valve into your pneumatic circuit.
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 MI40X80CM 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 40 mm bore cylinder uses a 1/4 inch air port and a M12x1.25 male rod thread.
No, this specific SKU lacks an internal magnet, so it cannot host CMSG, DMSG or EMSG switches. You must select an -S variant for position sensing. The unit features a CM round end cover and fixed TPU bumper pads that decelerate the stroke end without adjustable cushioning.
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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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