Airtac MI25~40 Stainless Steel Mini Cylinder MI40X100SR
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X100SR 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 MI40X100SR
Delivering serious muscle for a compact form, this double-acting round-body mini cylinder generates 628.3 N of push force at 0.5 MPa. The stainless-steel barrel and Ø16 mm rod shrug off mild corrosion, making it highly suitable for damp washdown environments where painted steel bodies would degrade. It features a 1/4" port and an R axial-in rear cover for straightforward plumbing in tight machinery layouts. Riveted construction keeps the assembly light, while fixed TPU bumper pads absorb the impact at stroke extremes.
For real-world sizing, plan for roughly 377 N of usable work at 0.5 MPa, accounting for friction and dynamic factors. In vertical lift scenarios, this translates to safely hoisting about 32 kg with a 2:1 safety margin. Because this SKU includes the -S magnet, you can directly mount CMSG, DMSG, or EMSG switches for precise position sensing.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X100SR Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X100SR |
|---|---|
| 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 MI40X100SR
| 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 MI40X100SR Is Used
Stamping Press Ejection
Uses the robust 628.3 N push force at 0.5 MPa to knock heavy stamped metal parts out of a die reliably on every cycle.
Package Divert Arm
Leverages the 100 mm stroke and stainless build to pivot heavy cardboard cartons on a washdown-grade packaging line.
Pallet Stop Gate
Acts as a heavy-duty pneumatic stop for loaded pallets, using its 32 kg safe vertical lift equivalent to manage gravity-fed accumulators.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X100SR the Right Cylinder?
When sizing this 40 mm bore, step down to the Ø32 option if your load is lighter—it yields 402.2 N push at 0.5 MPa, saving air and physical envelope. There is no larger standard MI bore, so if your application exceeds the 879.6 N push available at 0.7 MPa, you will need to explore a different cylinder family entirely. The 100 mm stroke is well within standard limits, but always ensure rigid guidance to prevent rod bending under side loads.
Remember that the fixed TPU bumpers only decelerate the piston near the stroke end; they do not act as a brake. If air pressure drops or the valve is centred, the piston will drift and drop the load. To secure a suspended weight safely, install an external rod lock or a pilot-operated check valve in the air 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 MI40X100SR FAQ
This 40 mm bore cylinder uses a 1/4" air port. It generates 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.
The -S suffix denotes a built-in piston magnet, allowing you to fit CMSG, DMSG, or EMSG electronic or reed switches. Note that this base MI model uses fixed TPU bumper pads to decelerate the stroke end, not an adjustable air cushion; for adjustable cushioning, look at the MIC variant.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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