Airtac MID Series Double Rod Mini Cylinder MID25X40S
The AirTAC Airtac MID Series Double Rod Mini Cylinder MID25X40S is a genuine double acting, double rod 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, double rod
- Rod threadM10×1.25
- CushionFixed TPU bumper pads
About the Airtac MID Series Double Rod Mini Cylinder MID25X40S
Delivering 206.1 N of thrust at 0.5 MPa in both directions, the AirTAC MID25X40S is a double-acting, through-rod mini cylinder. Because a Ø10 mm piston rod exits both end covers, the extend and retract areas are identical, ensuring equal force while the twin-rod geometry resists rotation and side loads without an external guide. The stainless-steel round barrel and rod shrug off mild corrosion and washdown environments. It uses a 1/8" port and conforms to the ISO 6432 mounting interface for easy bracket interchange.
For practical sizing, this bore yields a safe working load of roughly 124 N, capable of vertically lifting about 10.5 kg with a 2:1 safety margin. The included -S piston magnet allows solid-state or reed position sensing via CMSG, DMSG, or EMSG switches. Fixed TPU bumper pads decelerate the piston near stroke ends, though they will not lock the load if air pressure drops.
Airtac MID Series Double Rod Mini Cylinder MID25X40S Technical Specifications
| Model | Airtac MID Series Double Rod Mini Cylinder MID25X40S |
|---|---|
| Series | MID ISO 6432 mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 40 mm |
| Acting type | Double acting, double rod |
| 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 | Force (both ways) |
|---|---|
| 0.5 MPa | 206 N |
| 0.7 MPa | 289 N |
| Max (@1.0 MPa) | 42 kgf |
Double-rod: a rod exits both covers, so output force is equal in both directions (rod-side area used).
Model Code: Airtac MID Series Double Rod Mini Cylinder MID25X40S
| MID | ISO 6432 round-body mini cylinder (double-rod). |
|---|---|
| 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 MID Series Double Rod Mini Cylinder MID25X40S Is Used
Guided Push Stations
The twin-rod geometry resists rotation to deliver a steady 206.1 N guided push for seating or pressing small components without an external guide rail.
Back-Rod Switch Tripping
The rear rod end freely trips a CMSG or DMSG limit switch to confirm stroke completion while the front rod executes the 40 mm work stroke.
Symmetric Shuttling
Equal force both ways makes this cylinder optimal for shuttling a 10.5 kg payload back and forth between two processing stations at 30-800 mm/s.
Is the Airtac MID Series Double Rod Mini Cylinder MID25X40S the Right Cylinder?
When sizing this 25 mm bore, stepping down to the MID20X40S reduces the 0.5 MPa force to 131.9 N, whereas moving up to the MID32X40S increases it to 345.6 N. The through-rod design is ideal for applications needing a steady guided push, a back-rod stop, or a symmetric shuttle. Mounting options include LB foot, FA flange, and TC trunnion brackets, but the SDB pivot block is not offered on this double-rod variant. Remember that a plain cylinder drifts on air loss; use an external rod lock or pilot check valve if the load must be held in place.
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 MID Series Double Rod Mini Cylinder MID25X40S FAQ
Because the double-rod design uses the rod-side area on both faces, force is equal both ways: 206.1 N at 0.5 MPa, 288.5 N at 0.7 MPa, and a maximum theoretical output of 42.0 kgf at 1.0 MPa.
Yes, the -S suffix denotes a built-in piston magnet compatible with CMSG, DMSG, and EMSG switches. The stainless-steel barrel and rod also provide excellent resistance to mild corrosion and washdown environments.
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