Airtac MI25~40 Stainless Steel Mini Cylinder MI40X45CM
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X45CM is a genuine double acting round-body mini air cylinder with a Ø40mm bore and 45mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke45 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 MI40X45CM
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 piston rod shrug off mild corrosion and washdown, outlasting painted alternatives in damp facilities. Riveted construction keeps the frame compact, while fixed TPU bumper pads absorb stroke-end impact to protect your tooling.
Equipped with a 1/4" port and M12x1.25 male rod thread, it operates at speeds of 30-800 mm/s. Plan for roughly 377 N of actual work at 0.5 MPa to ensure smooth cycling, which translates to lifting about 32 kg vertically with a safe 2:1 margin. The rear CM round end provides a clean, axial profile for straightforward mounting.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X45CM Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X45CM |
|---|---|
| Series | MI mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 45 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 MI40X45CM
| MI | round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×45 | 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 MI40X45CM Is Used
Heavy Stamping Press Feed
Pushes thick steel blanks into a mechanical press with 628.3 N of force, utilizing the short 45 mm stroke for rapid, high-impact cycling.
Pallet Diverter Gate
Actuates a heavy routing gate on a packaging line, where the stainless build resists washdown and the Ø16 rod handles the lateral gate mass.
Carton Squaring Stop
Provides a solid 377 N working load to square large cardboard cartons before taping, absorbing the impact via fixed TPU bumper pads.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X45CM the Right Cylinder?
As the largest bore in the MI family, there is no larger standard size to step up to if 628.3 N at 0.5 MPa proves insufficient. Stepping down, the Ø32 bore provides 402.2 N of push force, making this Ø40 model the correct choice when you need to cross the 500 N threshold for moving heavier jigs or clamping thick stock. Because this specific SKU lacks the -S magnet, it cannot accept CMSG, DMSG or EMSG position switches; add an -S variant if your control system requires electronic end-of-stroke confirmation.
Remember that the fixed TPU bumpers only decelerate the piston near the stroke end; they do not function as a brake. If air pressure drops or the valve is centred, the rod will drift, so install a pilot-operated check valve or external rod lock if your application must hold a suspended load safely in place.
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 MI40X45CM FAQ
This 40 mm bore cylinder features a 1/4" port and generates 628.3 N push / 527.8 N pull at 0.5 MPa, and 879.6 N push / 738.9 N pull at 0.7 MPa. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
No, this specific SKU does not include a magnet. You must select an MI40 model with the -S suffix to use CMSG, DMSG, or EMSG switches. Additionally, as a Ø40 round-body mini cylinder, it uses a riveted stainless build with fixed TPU bumpers rather than 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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Most inquiries answered within 7-8 hours.
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