Airtac MI25~40 Stainless Steel Mini Cylinder MI25X125CM
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI25X125CM is a genuine double acting round-body mini air cylinder with a Ø25mm bore and 125mm stroke, 1/8" air ports and a stainless-steel barrel and rod for mildly corrosive environments. Its ISO 6432 mounting interface makes it a compact drop-in for standard mini-cylinder fixtures.
- BoreØ25 mm
- Stroke125 mm
- Port size1/8"
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionFixed TPU bumper pads
About the Airtac MI25~40 Stainless Steel Mini Cylinder MI25X125CM
Delivering 245.3 N of push force at 0.5 MPa, this double-acting stainless-steel round-body mini cylinder handles substantial work within a compact footprint. The Ø25 mm bore uses a 1/8" port and an M10x1.25 male rod thread. Its stainless barrel and piston rod resist mild corrosion, giving it a real edge over painted-steel or aluminium minis in damp, food, or outdoor environments. Fixed TPU bumper pads absorb the stroke-end impact, while the CM round back cover keeps the rear profile smooth.
For practical sizing, plan for about 147 N of real work at 0.5 MPa, which is roughly 60% of the theoretical rating. This equates to lifting a 12.5 kg part vertically with a safe 2:1 margin. Because this specific SKU lacks the -S magnet, it cannot accept CMSG, DMSG, or EMSG position switches. If your sequence requires sensing, you must select the -S variant instead.
Airtac MI25~40 Stainless Steel Mini Cylinder MI25X125CM Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI25X125CM |
|---|---|
| Series | MI ISO 6432 mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | 1/8" |
| Rod thread | M10×1.25 |
| 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.
Theoretical Output Force (Ø25mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 245 N | 206 N |
| 0.7 MPa | 344 N | 289 N |
| Max (@1.0 MPa) | 50 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 MI25X125CM
| MI | ISO 6432 round-body mini cylinder (double-acting). |
|---|---|
| 25 | Bore size in mm. |
| ×125 | 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 MI25X125CM Is Used
Packaging Diverter
Pushes heavy cartons at 245.3 N on a packaging line, using the 125 mm stroke to divert items into secondary lanes.
Pallet Stop Gate
Acts as a robust pneumatic stop for pallets, leveraging the stainless build to withstand dusty or humid warehouse conditions.
Component Press
Performs light-duty pressing or seating of bearings, safely delivering around 147 N of actual working force at 0.5 MPa.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI25X125CM the Right Cylinder?
When sizing this actuator, look at its neighbours: the Ø20 bore provides 157.0 N of push at 0.5 MPa, while stepping up to the Ø32 yields 402.2 N. The Ø25 hits a strong middle ground at 245.3 N. The 125 mm stroke is well within the 500 mm maximum for this bore, but at this length you should watch for side loads to prevent rod bending. The ISO 6432 mounting interface on this Ø25 bore drops directly into standard mini-cylinder brackets and clevises, and you can pair it with LB foot, FA flange, SDB pivot, or TC trunnion hardware. Note that a plain cylinder drifts when air is lost or the valve is centred; the bumpers only decelerate the end of stroke and act as neither a lock nor a brake. To hold a load securely, add 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 MI25X125CM FAQ
The 25 mm bore generates 245.3 N push and 206.1 N pull at 0.5 MPa, and 343.4 N push and 288.5 N pull at 0.7 MPa. The theoretical maximum force is 50 kgf at 1.0 MPa. The air port is 1/8" and the male rod thread is M10x1.25.
No, because this specific SKU does not include the -S magnet, it cannot accept CMSG, DMSG, or EMSG magnetic switches. You would need the -S variant for position sensing. It uses fixed TPU bumper pads for deceleration rather than an adjustable air cushion.
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