Airtac MI25~40 Stainless Steel Mini Cylinder MI40X40SCM
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X40SCM is a genuine double acting round-body mini air cylinder with a Ø40mm bore and 40mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke40 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 MI40X40SCM
Delivering 628.3 N of push force at 0.5 MPa, this double-acting stainless-steel round-body mini cylinder handles substantial actuation tasks within a compact footprint. The 40 mm bore pairs a 16 mm piston rod with a 1/4" port and a male M12x1.25 thread. Its riveted stainless barrel and rod shrug off mild corrosion, giving it a real edge over painted alternatives in damp or washdown settings. Fixed TPU bumper pads absorb stroke-end impact to protect the mechanism.
For practical sizing, plan for about 377 N of real work at 0.5 MPa, which safely lifts roughly 32 kg vertically with a 2:1 margin. The built-in magnet enables CMSG, DMSG, and EMSG switches for position sensing, while the CM round end cover keeps the rear profile smooth.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X40SCM Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X40SCM |
|---|---|
| Series | MI mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 40 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 MI40X40SCM
| MI | round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×40 | 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 MI40X40SCM Is Used
Heavy-Duty Clamping
Secures thick metal plates in a CNC machining fixture using its 628.3 N push force to prevent vibration during aggressive milling.
Pallet Diverting
Pushes loaded 30 kg pallets onto a secondary packaging line, utilising the 377 N safe working load to overcome initial sliding friction.
Vertical Part Ejection
Lifts finished molded components out of a heavy press, safely raising parts up to 32 kg against gravity with a 2:1 safety margin.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X40SCM the Right Cylinder?
When sizing this 40 mm bore, dropping down to the Ø32 model reduces the 0.5 MPa push force to 402.2 N, whereas this Ø40 unit provides 628.3 N. As the largest in the series, there is no larger standard MI bore available. Because a plain double-acting cylinder drifts when air is removed or a valve is centred, you must add an external rod lock or pilot check valve if the application requires holding a suspended load vertically. The 40 mm stroke keeps the rod short to minimise bending under high side loads.
Mounting options include LB foot, FA flange, SDB pivot, and TC trunnion brackets. The included -S magnet supports reed and electronic sensors, and the rear CM round cover offers a clean axial mounting interface.
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 MI40X40SCM 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. This 40 mm bore unit uses a 1/4" air port and a 16 mm rod.
No, the base MI uses fixed TPU bumper pads that decelerate the piston at the stroke end but do not offer adjustable cushioning. The MIC variant is required for adjustable air cushions. Additionally, the bumper is not a brake; the piston will drift if air is lost.
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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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