Airtac MI25~40 Stainless Steel Mini Cylinder MI40X450U
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X450U is a genuine double acting round-body mini air cylinder with a Ø40mm bore and 450mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke450 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 MI40X450U
Delivering 628.3 N of push force at 0.5 MPa, this double-acting round-body mini cylinder handles heavy-duty linear motion across its 450 mm stroke. 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 impact energy at the stroke ends.
Because it lacks an internal magnet, this specific SKU cannot host CMSG, DMSG or EMSG sensors. For position feedback, you would need the -S variant. In practical terms, plan for about 377 N of real work at 0.5 MPa, which means it can safely lift a 32 kg part vertically with a 2:1 safety margin. The 1/4" port and U-type 90-degree rear cover streamline plumbing in tight machinery envelopes.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X450U Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X450U |
|---|---|
| Series | MI mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 450 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 MI40X450U
| MI | round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×450 | 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 MI40X450U Is Used
Heavy Package Diversion
Pushes heavy cartons weighing up to 32 kg off a main packaging conveyor line using the 450 mm stroke and 628.3 N of thrust at 0.5 MPa.
Woodworking Clamp Arm
Secures timber stock during automated cutting operations, leveraging the stainless steel barrel to resist dusty, humid workshop environments.
Pallet Load Pusher
Transfers assembled goods horizontally onto awaiting pallets, utilizing the 90-degree U rear cover to optimize mounting within the palletizer frame.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X450U the Right Cylinder?
Sizing this 40 mm bore against its neighbours helps validate your choice: stepping down to Ø32 yields 402.2 N of push at 0.5 MPa, while Ø40 is the largest available MI size, offering 879.6 N at 0.7 MPa if you need extra margin. This makes the MI40X450U ideal when the smaller bore lacks thrust but you still want a compact round-body footprint. The U-type back cover provides a 90-degree port and pivot orientation for spatial flexibility.
Remember that a plain double-acting cylinder drifts when air is lost or the valve is centered, as the TPU bumpers only soften the stroke end rather than locking the load. To suspend a load safely mid-stroke, integrate an external rod lock or a pilot-operated check valve. Additionally, the 450 mm stroke demands careful alignment to prevent rod bending and premature seal wear under side loads.
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 MI40X450U FAQ
This 40 mm bore cylinder features a 1/4" air port and an M12x1.25 male rod thread. It 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. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
No, this specific SKU lacks a piston magnet, so it cannot host CMSG, DMSG or EMSG switches. You must select an MI40 model with the -S suffix for magnetic sensing. It uses fixed TPU bumper pads for end-of-stroke deceleration rather than an adjustable air cushion, and it is a non-ISO-6432 round-body design.
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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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