Airtac MI25~40 Stainless Steel Mini Cylinder MI25X20R
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI25X20R is a genuine double acting round-body mini air cylinder with a Ø25mm bore and 20mm 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
- Stroke20 mm
- Port size1/8"
- Acting typeDouble acting
- Rod threadM10×1.25
- 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 MI25X20R
Delivering 245.3 N of push force at 0.5 MPa, this double-acting stainless-steel round-body mini cylinder handles robust actuation in tight spaces. The Ø25 mm bore conforms to ISO 6432 mounting dimensions, dropping directly into standard mini-cylinder brackets and clevises for easy design integration. Its 20 mm short stroke and rear R axial-in port make it exceptionally compact for end-of-arm tooling.
The stainless-steel barrel and piston rod resist mild corrosion, outperforming painted alternatives in damp or washdown environments. Fixed TPU bumper pads absorb stroke-end impact without the complexity of adjustable cushioning. Plan for roughly 147 N of actual work at 0.5 MPa, which means it can safely lift about 12.5 kg vertically with a 2:1 safety margin. Note that this specific SKU lacks a magnet, so it cannot host CMSG, DMSG or EMSG sensors.
Airtac MI25~40 Stainless Steel Mini Cylinder MI25X20R Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI25X20R |
|---|---|
| Series | MI ISO 6432 mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 20 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 MI25X20R
| MI | ISO 6432 round-body mini cylinder (double-acting). |
|---|---|
| 25 | Bore size in mm. |
| ×20 | 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 MI25X20R Is Used
Short-Stroke Clamping
Ideal for locking small aluminium extrusions in place on a CNC machining fixture, utilising its 245 N push force within a tight 20 mm travel.
Flap Deflection
Perfect for rapidly folding cardboard carton flaps on a packaging line, where the stainless build withstands occasional washdowns and the short stroke saves space.
Gate Diversion
Provides a swift 20 mm pop-up action to deflect small plastic parts on a conveyor belt, moving roughly 12.5 kg loads reliably at 0.5 MPa.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI25X20R the Right Cylinder?
When sizing this actuator, the neighbouring Ø20 bore provides 157 N of push at 0.5 MPa, while the larger Ø32 offers 402 N, allowing you to step up or down if your payload shifts. Because this base MI variant has no -S magnet, position sensing is impossible without upgrading to the -S version. You can mount it using LB foot, FA flange, SDB pivot, or TC trunnion hardware, complemented by the R axial-in rear cover.
Remember that venting the air supply causes the piston to drift, as the TPU bumpers only decelerate the stroke end rather than locking the rod. To suspend a vertical load safely, install an external rod lock or a pilot-operated check valve. The 20 mm stroke keeps the rod short, naturally minimizing side-load bending, but lateral forces should still be avoided to preserve seal life.
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 MI25X20R FAQ
At 0.5 MPa it pushes with 245.3 N and pulls with 206.1 N. At 0.7 MPa the push is 343.4 N and pull is 288.5 N. The theoretical maximum force is 50 kgf at 1.0 MPa. The air port is 1/8 inch and the male rod thread is M10x1.25.
Yes, the Ø25 bore uses the ISO 6432 mounting interface, so it fits standard mini-cylinder clevises and flanges like LB, FA, SDB, and TC. However, because this SKU lacks a magnet, you cannot mount CMSG, DMSG, or EMSG sensors; you would need the -S variant for position detection.
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