Airtac MI25~40 Stainless Steel Mini Cylinder MI40X100SU
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X100SU is a genuine double acting round-body mini air cylinder with a Ø40mm bore and 100mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke100 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 MI40X100SU
Delivering 628.3 N of push force at 0.5 MPa, this double-acting round-body mini cylinder handles demanding actuation tasks. The stainless-steel barrel and Ø16 rod resist mild corrosion, making it superior to painted alternatives in damp environments. It features a 1/4" air port and a 90-degree U back cover for compact mounting.
With a 100 mm stroke, the fixed TPU bumper pads absorb end-of-stroke impacts without offering adjustable cushioning. The built-in -S magnet supports CMSG, DMSG and EMSG switches for position sensing. Plan for roughly 377 N of actual work at 0.5 MPa, which safely lifts about 32 kg vertically with a 2:1 margin.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X100SU Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X100SU |
|---|---|
| Series | MI mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 100 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 MI40X100SU
| MI | round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×100 | 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 MI40X100SU Is Used
Heavy Carton Diverter
Pushes loaded packaging cartons weighing up to 32 kg onto secondary packaging lines using the 628.3 N push force.
Washdown Gate Actuator
Operates stainless-steel fluid control gates in damp food processing zones where the corrosion-resistant barrel excels.
Pallet Stopper Arm
Deploys a 100 mm stroke to halt heavy pallets on roller conveyors, relying on fixed TPU pads to absorb the impact.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X100SU the Right Cylinder?
As the largest bore in the series, there is no larger standard MI size for scaling up; if 628.3 N at 0.5 MPa is excessive, step down to the Ø32 bore which provides 402.2 N. This SKU includes the -S magnet for electronic or reed sensors, and the U back cover suits 90-degree port orientations. For 100 mm of travel, side-load rod bending is minimal but always verify alignment.
Air pressure alone does not secure the piston if supply drops or the valve centres, as the rod drifts without a locking mechanism. The TPU bumpers only decelerate the stroke end rather than acting as a brake. To suspend a load safely mid-stroke, install an external rod lock or a pilot-operated check valve.
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 MI40X100SU FAQ
At 0.5 MPa it pushes 628.3 N and pulls 527.8 N. At 0.7 MPa it pushes 879.6 N and pulls 738.9 N. The theoretical maximum force is 128.1 kgf at 1.0 MPa. It uses a 1/4" air port and an M12x1.25 male rod thread.
No, the piston drifts if air is lost; the fixed TPU bumpers only decelerate the stroke end and do not lock the rod. Use an external pilot check valve for holding. Because it has the -S magnet, it supports CMSG, DMSG and EMSG position switches.
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.
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