Airtac MI25~40 Stainless Steel Mini Cylinder MI40X25CM
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X25CM is a genuine double acting round-body mini air cylinder with a Ø40mm bore and 25mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke25 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 MI40X25CM
Delivering 628.3 N of push force at 0.5 MPa, the AirTAC MI40X25CM is a robust round-body mini cylinder built for heavy-duty compact automation. The stainless-steel barrel and Ø16 mm piston rod shrug off mild corrosion and washdown environments better than painted alternatives. A 1/4" port feeds the double-acting chambers, while fixed TPU bumper pads absorb the impact at stroke extremes. The CM round end caps the rear, offering a clean, compact footprint for tight machinery layouts.
For real-world sizing, plan for a safe working load of roughly 377 N rather than pushing the absolute limit. This translates to lifting about 32 kg vertically with a 2:1 safety margin, letting you match the cylinder to actual part weights. Because this SKU lacks the -S magnet, it cannot accept CMSG, DMSG, or EMSG position switches.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X25CM Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X25CM |
|---|---|
| Series | MI mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 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 MI40X25CM
| MI | round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×25 | 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 MI40X25CM Is Used
Short-Stroke Stamping
Applies the 628.3 N push force to crimp small metal terminals or stamp light gauge plates in a compact sub-assembly fixture.
Heavy Diverter Gate
Swings a robust routing flap on a packaging line to sort dense product, relying on the 25 mm stroke for rapid, high-force actuation.
Pallet Stop Block
Raises a solid stop pin to halt heavy pallets on a gravity roller conveyor, using the stainless build to endure industrial wear.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X25CM the Right Cylinder?
When sizing this 40 mm bore, step down to the Ø32 bore if your task only needs 402.2 N of push at 0.5 MPa, as the MI40X25CM represents the maximum standard force ceiling in this mini cylinder family. If your mechanism loses air or the valve is centred, the piston will drift and drop the load; the TPU bumpers only soften the end-of-stroke impact and act purely as decelerators, never as a holding brake. To suspend a load safely, integrate an external rod lock or a pilot-operated check valve into your pneumatic circuit. The CM round back cover suits basic rear mounting, and you can utilize LB foot or FA flange brackets for secure anchoring.
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 MI40X25CM FAQ
The 40 mm bore generates 628.3 N push and 527.8 N pull at 0.5 MPa, increasing to 879.6 N push and 738.9 N pull at 0.7 MPa, with a theoretical maximum of 128.1 kgf at 1.0 MPa. It uses a 1/4" air port and an M12x1.25 male rod thread.
No, this specific SKU does not include a magnet, so it cannot host CMSG, DMSG, or EMSG switches. You would need the -S variant for magnetic sensing. It features fixed TPU bumper pads for stroke deceleration, not an adjustable air cushion.
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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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