Airtac MI25~40 Stainless Steel Mini Cylinder MI40X30SCM
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X30SCM is a genuine double acting round-body mini air cylinder with a Ø40mm bore and 30mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke30 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 MI40X30SCM
Delivering 628.3 N of push force at 0.5 MPa, this double-acting stainless-steel round-body mini cylinder handles heavy-duty tasks within a compact footprint. The Ø40 mm bore operates on a 1/4" air port and features a robust M12x1.25 male rod thread. Built with a riveted stainless-steel barrel and rod, it naturally resists mild corrosion and washdown environments better than painted alternatives.
Equipped with fixed TPU bumper pads to decelerate the stroke end, it runs smoothly across a 30-800 mm/s speed range. For practical sizing, plan for a safe working load of about 377 N, which means it can comfortably lift a 32 kg part vertically with a 2:1 safety margin. The built-in -S magnet directly supports CMSG, DMSG, and EMSG position switches.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X30SCM Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X30SCM |
|---|---|
| Series | MI mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 30 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 MI40X30SCM
| MI | round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×30 | 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 MI40X30SCM Is Used
Stamping Press Feeders
Clamps and feeds heavy sheet metal blanks into a press, utilising the 628.3 N push force to securely grip dense materials without slipping.
Pallet Diverters
Pushes loaded pallets sideways at transfer stations, where the 1/4" port ensures rapid actuation to maintain high conveyor throughput.
Vertical Parts Lifters
Raises 30 kg machinery components between elevations, relying on the stainless construction to endure humid or washdown warehouse zones.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X30SCM the Right Cylinder?
When sizing this actuator, the neighbouring Ø32 bore offers 402.2 N of push at 0.5 MPa, while the Ø40 is the largest available in this series, so moving beyond 628.3 N requires a different cylinder family altogether. If your application demands holding a load vertically during an air loss or valve centre state, note that the piston will drift; the bumper pads only soften the end of stroke and act as a brake. You should integrate an external rod lock or a pilot-operated check valve for secure load holding.
This specific SKU features a CM round end back cover, which dictates the rear mounting and port orientation. The included piston magnet allows for precise sensor placement along the body. Despite the short 30 mm stroke, always verify rod alignment to minimise side-loading and prevent premature rod-bending wear.
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 MI40X30SCM FAQ
At 0.5 MPa it provides 628.3 N push and 527.8 N pull; at 0.7 MPa it delivers 879.6 N push and 738.9 N pull. The theoretical maximum force is 128.1 kgf at 1.0 MPa. This Ø40 bore uses a 1/4" air port and a Ø16 mm rod with an M12x1.25 thread.
Yes, the -S suffix denotes a built-in piston magnet designed to accept CMSG, DMSG, and EMSG reed or electronic switches. The CM designation specifies a round end rear cover, which provides a specific axial mounting and port orientation for your assembly layout.
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1-Year Warranty
Covers non-human-caused product damage.
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