Airtac MI25~40 Stainless Steel Mini Cylinder MI40X80SCM
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X80SCM 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 MI40X80SCM
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 riveted stainless barrel and Ø16 mm rod shrug off mild corrosion and washdown, outlasting painted alternatives in damp production areas. With a practical working load of roughly 377 N, it lifts about 32 kg vertically with a 2:1 safety margin. The 1/4" port feeds air rapidly, while fixed TPU bumper pads absorb the end-of-stroke impact across the 80 mm travel.
Because this is a Ø40 bore, it falls outside the ISO 6432 mounting standard, functioning purely as a robust round-body mini cylinder. The SKU includes an internal magnet (-S) for CMSG, DMSG or EMSG position sensing, and uses a CM round rear cover for straightforward port and mounting orientation.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X80SCM Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X80SCM |
|---|---|
| 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 MI40X80SCM
| 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 MI40X80SCM Is Used
Stamping Press Ejection
Kicks heavy stamped metal parts out of a press bed using 628.3 N of push force, with the stainless build resisting cutting fluid splash.
Pallet Diverting Arm
Swings a diverter arm to reroute heavy pallets on a packaging line, utilizing the 80 mm stroke and CM round end for compact pivoting.
Vertical Carton Lift
Hoists loaded shipping cartons weighing up to 32 kg between conveyor tiers, relying on the internal magnet for DMSG switch confirmation.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X80SCM the Right Cylinder?
When sizing this 628.3 N unit, dropping down to a Ø32 bore reduces the 0.5 MPa push to 402.2 N, while no larger MI series exists above Ø40 for higher demands. Plan for around 377 N of actual work at 0.5 MPa rather than the theoretical maximum. Remember that venting the air or centering the valve causes the piston to drift; the TPU bumpers only soften the stroke end and will not hold a load, so fit an external rod lock or pilot check valve if position retention is required. The 80 mm stroke minimizes rod-bending side loads, and the CM back cover suits compact rear mounting.
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 MI40X80SCM FAQ
At 0.5 MPa it provides 628.3 N push and 527.8 N pull. At 0.7 MPa it yields 879.6 N push and 738.9 N pull. The theoretical maximum force is 128.1 kgf at 1.0 MPa. This Ø40 bore uses a 1/4" air port and a Ø16 mm rod with an M12x1.25 male thread.
No, the piston will drift if air is lost or the valve is centered. The fixed TPU bumper pads only decelerate the stroke end and do not act as a brake. For vertical loads, you must install an external rod lock or pilot-operated check valve.
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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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