Airtac MI25~40 Stainless Steel Mini Cylinder MI40X450CM
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X450CM 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 MI40X450CM
Delivering 628.3 N of push force at 0.5 MPa, the AirTAC MI40X450CM is a robust double-acting round-body mini cylinder built for demanding automation. It features a 40 mm bore, a 450 mm stroke, and a 1/4" port. The stainless-steel barrel and piston rod resist mild corrosion and washdowns, outperforming painted alternatives in damp environments. Fixed TPU bumper pads absorb end-of-stroke impact, while the CM round rear cover provides a clean, compact profile for tight machinery layouts.
For real-world sizing, plan for a safe working load of about 377 N rather than the absolute maximum rating. Vertically, this translates to lifting roughly 32 kg with a 2:1 safety margin, letting you match the actuator to actual part weights. Because this SKU lacks the -S magnet, it cannot accept CMSG, DMSG, or EMSG position switches; choose the -S variant if your control system requires sensing.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X450CM Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X450CM |
|---|---|
| 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 MI40X450CM
| 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 MI40X450CM Is Used
Heavy-Part Ejection
Pushes completed metal castings out of a CNC machining center using the 628.3 N push force, relying on the 450 mm stroke to clear the work envelope completely.
Pallet Diversion
Actuates a heavy-duty routing gate on a packaging conveyor, where the stainless construction holds up against occasional washdowns and the CM rear cover fits the tight frame.
Vertical Lift Gate
Raises a 30 kg access door on an automated storage system, staying safely within the 32 kg vertical lift capacity calculated with a 2:1 safety margin.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X450CM the Right Cylinder?
When sizing this 40 mm bore actuator, compare it against the adjacent 32 mm option, which provides 402.2 N of push force at 0.5 MPa. If your application demands even more power, the MI40 represents the largest available bore in this series, so moving beyond 628.3 N requires switching to a different cylinder family. The 450 mm stroke is well within the 500 mm maximum standard stroke limit, keeping the unit as an off-the-shelf configuration.
Remember that a standard double-acting cylinder drifts when air pressure is lost or the valve is centered, as the TPU bumpers only decelerate the piston and do not function as a braking lock. To suspend a load safely during an emergency stop, 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 MI40X450CM FAQ
This 40 mm bore cylinder features a 1/4" port and a 450 mm stroke. The double-acting thrust outputs are 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 does not include a magnet, so it cannot accept CMSG, DMSG, or EMSG magnetic switches. You must select the -S variant of this round-body mini cylinder if your application requires electronic position sensing.
Authorized Export Seller
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.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac MI25~40 Stainless Steel Mini Cylinder MI40X450CM
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.