Airtac MI25~40 Stainless Steel Mini Cylinder MI25X40SR
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI25X40SR is a genuine double acting round-body mini air cylinder with a Ø25mm bore and 40mm 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
- Stroke40 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 MI25X40SR
Delivering 245.3 N of push force at 0.5 MPa, this double-acting stainless-steel round-body mini cylinder handles substantial work in compact spaces. The Ø25 bore conforms to ISO 6432 mounting dimensions, dropping directly into standard mini-cylinder brackets and clevises for easy design integration. Its stainless barrel and rod resist mild corrosion, giving it a real edge over painted-steel or aluminium alternatives in damp, food, or outdoor environments.
The riveted round body is compact, and fixed TPU bumper pads decelerate the piston at stroke end to reduce impact wear. Equipped with a piston magnet (-S), it supports CMSG, DMSG, and EMSG position switches. Plan for about 147 N of actual work at 0.5 MPa to ensure reliable operation, which translates to lifting roughly 12.5 kg vertically with a 2:1 safety margin. Air ports are 1/8".
Airtac MI25~40 Stainless Steel Mini Cylinder MI25X40SR Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI25X40SR |
|---|---|
| Series | MI ISO 6432 mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 40 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 MI25X40SR
| MI | ISO 6432 round-body mini cylinder (double-acting). |
|---|---|
| 25 | Bore size in mm. |
| ×40 | 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 MI25X40SR Is Used
Packaging Line Diverter
Pushes medium-weight cartons on a washdown conveyor belt, utilising the 245.3 N thrust and stainless build to withstand humid packing areas.
Textile Loom Tensioner
Actuates a tensioning guide on a textile machine, where the compact 40 mm stroke and fixed TPU bumpers handle rapid, repetitive cycling.
Parts Ejection Gate
Opens a heavy ejection gate on a CNC cell, lifting components around 12.5 kg safely with the 2:1 vertical lift margin at 0.5 MPa.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI25X40SR the Right Cylinder?
When sizing this model, compare it against its neighbours: a Ø20 bore provides 157.0 N push at 0.5 MPa, while stepping up to a Ø32 yields 402.2 N. The Ø25 hits a strong middle ground for 245.3 N tasks. Remember that a plain double-acting cylinder drifts if air pressure drops or the valve is centred; the TPU bumpers only soften the stroke end and do not act as a lock. To hold a load securely, add an external rod lock or a pilot-operated check valve.
This SKU features an R axial-in back cover port orientation. The included magnet (-S) enables electronic or reed sensor tracking. For longer strokes approaching the 500 mm maximum, verify side-loading to prevent rod bending, and explore the MIC variant if you need adjustable air cushioning for high-speed cycles.
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 MI25X40SR FAQ
This Ø25 bore cylinder has a 1/8" air port and an M10x1.25 male rod thread. It generates 245.3 N push and 206.1 N pull at 0.5 MPa, 343.4 N push and 288.5 N pull at 0.7 MPa, with a theoretical maximum force of 50 kgf at 1.0 MPa.
Yes, the -S suffix means it has a built-in magnet for CMSG, DMSG, or EMSG switches. However, it does not hold position on air loss; the fixed TPU bumper pads only decelerate the stroke end. You must use an external rod lock or pilot check valve for load holding.
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1-Year Warranty
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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