Airtac MI25~40 Stainless Steel Mini Cylinder MI40X450SR
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X450SR 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 MI40X450SR
Delivering 628.3 N of push force at 0.5 MPa, this double-acting stainless-steel round-body mini cylinder handles heavy-duty linear motion across its 450 mm stroke. The Ø40 bore operates on a 1/4" port with a robust Ø16 piston rod, while the riveted stainless construction resists mild corrosion and washdown better than painted alternatives. Fixed TPU bumper pads absorb the end-of-stroke impact, and the built-in magnet (-S) directly supports CMSG, DMSG, and EMSG position switches.
For practical sizing, plan for roughly 377 N of real work at 0.5 MPa, which translates to lifting about 32 kg vertically with a safe 2:1 margin. The rear R cover features an axial-in port orientation, simplifying plumbing in tight machinery layouts. Operating pressure spans 0.15-1.0 MPa, with a speed range of 30-800 mm/s.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X450SR Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X450SR |
|---|---|
| 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 MI40X450SR
| 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 MI40X450SR Is Used
Heavy Package Diverter
Pushes heavy cartons across sorting lanes using the 628.3 N push force, with the 450 mm stroke ensuring full traversal across wider conveyor belts.
Industrial Press Ejector
Ejects formed metal parts from a hydraulic press bed, leveraging the 527.8 N pull force at 0.5 MPa to retract the 16 mm rod clear of the tooling.
Pallet Load Stopper
Acts as a high-force end-stop for inbound pallets on a roller conveyor, where the stainless barrel withstands dusty ambient conditions and occasional washdown.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X450SR the Right Cylinder?
When sizing this 40 mm bore, stepping down to the Ø32 class drops the 0.5 MPa push force to 402.2 N, while no larger AirTAC MI exists above Ø40. The 450 mm stroke is well within the 500 mm maximum standard stroke, though at this extended length you must carefully manage side loads to prevent rod bending and premature seal wear. The R axial-in back cover provides flexible porting, and you can utilize LB foot, FA flange, SDB pivot, or TC trunnion mounts.
Because the fixed TPU bumpers only decelerate the stroke end and never act as a lock, the piston will drift if air is lost or the valve is centered. To suspend a load safely during an outage, integrate an external rod lock or a pilot-operated check valve into your pneumatic circuit.
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 MI40X450SR FAQ
The 1/4" port feeds a Ø16 rod delivering 628.3 N push and 527.8 N pull at 0.5 MPa. At 0.7 MPa it yields 879.6 N push and 738.9 N pull, with a theoretical maximum of 128.1 kgf at 1.0 MPa.
Yes, the -S suffix denotes a built-in magnet for CMSG, DMSG, or EMSG switches. The R back cover provides an axial-in port orientation, aligning the air line straight back along the cylinder body to save space.
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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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