Airtac MI25~40 Stainless Steel Mini Cylinder MI40X25SR
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI40X25SR is a genuine double acting round-body mini air cylinder with a Ø40mm bore and 25mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke25 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 MI40X25SR
Delivering 628.3 N of push force at 0.5 MPa, this double-acting round-body mini cylinder handles heavy tasks in tight spaces. The stainless-steel barrel and piston rod resist mild corrosion and washdown, outperforming painted alternatives in damp environments. A 1/4" air port feeds the 40 mm bore, while fixed TPU bumper pads absorb stroke-end impact. The riveted construction keeps the body compact despite the high thrust. Equipped with an R axial-in rear cover, it routes piping neatly along the cylinder axis.
Because the 628.3 N rating is theoretical, plan for a safe working load of about 377 N at 0.5 MPa. Vertically, this translates to lifting roughly 32 kg with a 2:1 safety margin. The built-in magnet (-S) supports CMSG, DMSG, and EMSG position switches for precise end-of-stroke detection in automated lines.
Airtac MI25~40 Stainless Steel Mini Cylinder MI40X25SR Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI40X25SR |
|---|---|
| Series | MI mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 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 MI40X25SR
| MI | round-body mini cylinder (double-acting). |
|---|---|
| 40 | Bore size in mm. |
| ×25 | 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 MI40X25SR Is Used
Short-Stroke Stamping
Drives a compact marking press to emboss batch codes into aluminum tags using the full 628.3 N thrust over the 25 mm travel.
Heavy Diverter Gate
Pushes loaded pallets sideways at a transfer junction, relying on the stainless body to endure humid washdown zones.
Carton Stopper Arm
Halts heavy corrugated boxes on a gravity roller line, using the axial-in R port to keep pneumatic hoses clear of the packaging flow.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI40X25SR the Right Cylinder?
As the largest bore in the series, the MI40X25SR tops the range with 628.3 N push at 0.5 MPa; if you need less force, the Ø32 model steps down to 402.2 N. This 25 mm stroke is very short, minimizing rod bending and side-load risks. Remember that the fixed TPU bumpers only decelerate the piston near stroke end—they do not lock the rod. If air pressure drops or the valve centers, the piston drifts, so install an external rod lock or pilot-operated check valve to suspend loads safely.
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 MI40X25SR FAQ
This 40 mm bore cylinder features a 1/4" air port and a 16 mm rod. 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.
No, the fixed TPU bumper pads only decelerate the stroke end and cannot act as a brake. If air is lost or the valve centers, the piston drifts. To suspend a load safely, fit an external rod lock or a pilot-operated check valve.
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.
Request a Quote for Airtac MI25~40 Stainless Steel Mini Cylinder MI40X25SR
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.