Airtac MI25~40 Stainless Steel Mini Cylinder MI25X40U
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI25X40U 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 MI25X40U
Delivering 245.3 N of push force at 0.5 MPa, this double-acting stainless-steel round-body mini cylinder handles substantial work in tight spaces. The riveted barrel and rod shrug off mild corrosion, giving it a real edge over painted alternatives in damp or washdown areas. Because it carries no internal magnet, this specific SKU cannot host CMSG, DMSG or EMSG sensors; you must specify the -S variant for position detection.
Its 1/8" port feeds the 10 mm piston rod to generate 206.1 N of pull on the return stroke. The 90-degree U back cover reorients the port and pivot geometry for compact machinery layouts. Plan for roughly 147 N of actual work at 0.5 MPa to maintain a safe margin, which means it can vertically lift about 12.5 kg against gravity.
Airtac MI25~40 Stainless Steel Mini Cylinder MI25X40U Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI25X40U |
|---|---|
| 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 MI25X40U
| 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 MI25X40U Is Used
Package Divert Gate
Swings a lightweight routing flap on a packaging line, using the 245.3 N thrust to push parcels firmly into secondary sorting lanes.
Damp Welding Clamp
Holds tubular steel frames in a humid fabrication cell where the stainless barrel prevents corrosion from coolant splashes and grinding swarf.
Carton Lid Press
Deploys the 40 mm stroke to fold and secure corrugated carton flaps prior to taping, relying on the 90-degree U cover for tight clearance.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI25X40U the Right Cylinder?
When sizing this 25 mm bore, the smaller 20 mm option yields 157.0 N of push, while stepping up to the 32 mm bore provides 402.2 N at 0.5 MPa. The fixed TPU bumper pads soften stroke-end impact but do not function as an adjustable air cushion; for high-speed deceleration look at the MIC variant. Because air pressure alone cannot hold a load if the valve is centred or supply drops, the piston will drift unless you fit an external rod lock or pilot check valve.
The 40 mm stroke keeps the rod short to minimise bending under side loads, and the U-type rear cover suits pivot or clevis mounting arrangements. Standard LB foot, FA flange, SDB pivot-block and TC trunnion brackets fit the ISO 6432 mounting interface, dropping directly into standard mini-cylinder hardware.
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 MI25X40U FAQ
This 25 mm bore cylinder features a 1/8" port and a 10 mm rod. 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 of 50 kgf at 1.0 MPa.
No, this SKU lacks the internal magnet so it cannot accept CMSG, DMSG or EMSG switches. You must select the -S magnet option for position sensing. It uses the ISO 6432 mounting interface and fixed TPU bumper pads rather than an adjustable cushion.
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Covers non-human-caused product damage.
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