Airtac MI25~40 Stainless Steel Mini Cylinder MI25X40SCM
The AirTAC Airtac MI25~40 Stainless Steel Mini Cylinder MI25X40SCM 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 MI25X40SCM
Delivering 245.3 N of push force at 0.5 MPa, this double-acting stainless-steel round-body mini cylinder handles robust actuation tasks. The Ø25 bore uses a 1/8" port and an M10x1.25 male rod thread. Its stainless barrel and rod resist mild corrosion, giving it a real edge over painted-steel or aluminium minis in damp, food or outdoor environments. Built with fixed TPU bumper pads to decelerate the stroke end, the riveted construction remains compact and light.
Because the code includes an S, this unit features a built-in piston magnet for CMSG, DMSG or EMSG switches. For actual work at 0.5 MPa, plan for roughly 147 N of usable load rather than the absolute maximum rating. In vertical lifting scenarios, this translates to safely hoisting about 12.5 kg with a 2:1 margin. The CM round end back cover provides a clean rear profile for tight installations.
Airtac MI25~40 Stainless Steel Mini Cylinder MI25X40SCM Technical Specifications
| Model | Airtac MI25~40 Stainless Steel Mini Cylinder MI25X40SCM |
|---|---|
| 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 MI25X40SCM
| 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 MI25X40SCM Is Used
Package Diverting Gate
Uses the 245.3 N push force at 0.5 MPa to reliably pivot a sorting gate arm, redirecting medium-weight cartons on a packaging line.
Vertical Parts Lifter
Lifts small stainless-steel fixtures weighing up to 12.5 kg in a washdown assembly cell, relying on the corrosion-resistant barrel.
Pallet Stopper Arm
Extends 40 mm to block incoming pallets at a packaging station, using the CM round end to fit neatly into the conveyor frame.
Is the Airtac MI25~40 Stainless Steel Mini Cylinder MI25X40SCM the Right Cylinder?
Sizing this actuator requires looking both ways: stepping down to the Ø20 bore drops the 0.5 MPa push force to 157.0 N, while upgrading to the Ø32 bore raises it to 402.2 N. This Ø25 model strikes a strong balance for medium-duty handling. It uses the ISO 6432 mini-cylinder mounting interface, so it drops directly into standard brackets and clevises. You can also utilise LB foot, FA flange, SDB pivot or TC trunnion mounts.
Remember that a plain cylinder drifts when air is lost or the valve is centred, as the TPU bumpers only soften the stroke end rather than acting as a brake. To hold a load securely, integrate an external rod lock or a pilot-operated check valve. With a 40 mm stroke, side-load and rod-bending stress remain minimal, but ensure the front mounting keeps the rod aligned for smooth operation.
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 MI25X40SCM FAQ
This double-acting cylinder features a 1/8" air port. At 0.5 MPa it provides 245.3 N push and 206.1 N pull force. At 0.7 MPa it delivers 343.4 N push and 288.5 N pull. The theoretical maximum force is 50 kgf at 1.0 MPa.
Yes, the S in the model code denotes a built-in piston magnet, allowing you to mount CMSG, DMSG or EMSG electronic or reed switches directly to the body. For impact absorption, it relies on fixed TPU bumper pads that decelerate the piston at the stroke end; it does not feature an adjustable air cushion.
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