Airtac MI25~40 Stainless Steel Mini Cylinder MI40X450R
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X450R 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 MI40X450R
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 piston rod resist mild corrosion and washdown, outperforming painted alternatives in damp environments. Fixed TPU bumper pads absorb the impact at stroke ends, decelerating the piston without the complexity of adjustable cushioning. The R back cover configures the port for axial-in orientation, keeping pneumatic lines neatly aligned.
Because the 1/4" port drives a large bore, buyers can plan for a safe working load of roughly 377 N at 0.5 MPa, or vertically lifting about 32 kg with a 2:1 safety margin. Note that this SKU lacks the -S magnet, so it cannot host CMSG, DMSG, or EMSG reed switches for position sensing.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X450R Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X450R |
|---|---|
| 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 MI40X450R
| 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 MI40X450R Is Used
Pallet Divertor
Pushes heavy wood pallets sideways on a packaging line using the 628.3 N push force, with the 450 mm stroke easily clearing the conveyor frame.
Parts Press
Presses bearings into aluminum housings on an assembly fixture, utilizing the 527.8 N pull force to retract the tooling after the insertion cycle.
Container Lid Lifter
Raises stainless steel washdown tank lids in a food plant, where the corrosion-resistant barrel withstands frequent high-pressure cleaning.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X450R the Right Cylinder?
When sizing this 40 mm bore, stepping down to the Ø32 variant reduces the 0.5 MPa push force to 402.2 N, while no larger MI series bore exists above it. For applications requiring position feedback, select the -S magnet version to enable sensor switches, as this base model cannot accept them. The 450 mm stroke is well within the 500 mm standard maximum, though at full extension the Ø16 rod is susceptible to side-loading; ensure the load travels purely axially to prevent premature seal wear and rod bending.
This cylinder relies on air for both extension and retraction. If the air supply drops or the valve is centred, the piston will drift and cannot hold a load in place—the TPU bumpers only soften the end-of-stroke impact, acting neither as a brake nor a lock. To suspend a load safely during an air loss event, install an external pilot-operated check valve or a dedicated rod lock.
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 MI40X450R FAQ
This 40 mm bore cylinder features a 1/4" air port and a M12x1.25 male rod thread. It generates 628.3 N push and 527.8 N pull at 0.5 MPa, 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.
No, this specific SKU does not include a piston magnet, so CMSG, DMSG, or EMSG switches cannot be used. You must order the -S variant (MI40X450R-S) to enable magnetic position sensing.
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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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