Airtac MID Series Double Rod Mini Cylinder MID20X25S
The AirTAC Airtac MID Series Double Rod Mini Cylinder MID20X25S is a genuine double acting, double rod round-body mini air cylinder with a Ø20mm bore and 25mm 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.
- BoreØ20 mm
- Stroke25 mm
- Port size1/8"
- Acting typeDouble acting, double rod
- Rod threadM8×1.25
- CushionFixed TPU bumper pads
About the Airtac MID Series Double Rod Mini Cylinder MID20X25S
Delivering 131.9 N of thrust at 0.5 MPa in both directions, the AirTAC MID20X25S is a stainless-steel round-body mini cylinder built for guided motion. Because a piston rod exits both end covers, the extend and retract forces are identical, and the twin-rod design naturally resists rotation and side loads without needing an external guide. The rear rod end is free to trip a switch or carry a stop. Its stainless barrel and rod shrug off mild corrosion and washdown environments.
This 20 mm bore unit uses a 1/8" port and conforms to the ISO 6432 mounting interface for easy bracket integration. With a 0.5 MPa input, you get a safe working load of roughly 79 N, which translates to vertically moving about 6.7 kg each way with a 2:1 safety margin. The included -S magnet enables position sensing with CMSG, DMSG, or EMSG switches.
Airtac MID Series Double Rod Mini Cylinder MID20X25S Technical Specifications
| Model | Airtac MID Series Double Rod Mini Cylinder MID20X25S |
|---|---|
| Series | MID ISO 6432 mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 25 mm |
| Acting type | Double acting, double rod |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| 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 (Ø20mm)
| Pressure | Force (both ways) |
|---|---|
| 0.5 MPa | 132 N |
| 0.7 MPa | 185 N |
| Max (@1.0 MPa) | 27 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 MID20X25S
| MID | ISO 6432 round-body mini cylinder (double-rod). |
|---|---|
| 20 | 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 MID Series Double Rod Mini Cylinder MID20X25S Is Used
Symmetric Shuttle Transfer
Pushing a light workpiece 25 mm left or right with 131.9 N of equal force, relying on the twin rod to keep the shuttle steady without twisting.
Rear-Rod Switch Trip
Using the extended back rod end to physically trigger an external limit switch, while the internal -S magnet operates DMSG sensors for dual confirmation.
Guided Pressing Task
Applying a steady 79 N safe working load to seat a small component, where the double-rod construction prevents the piston from rotating under side load.
Is the Airtac MID Series Double Rod Mini Cylinder MID20X25S the Right Cylinder?
When sizing this double-acting unit, consider the neighboring bores: stepping down to the MID16X25S drops the 0.5 MPa force to 86.4 N, while moving up to the MID25X25S raises it to 206.1 N. The through-rod architecture is ideal when you need anti-rotation stability, a back-rod switch trip, or symmetric shuttle movements. It operates at 30-800 mm/s.
Remember that the fixed TPU bumper pads only soften the stroke end; they do not lock the piston. If air pressure drops, the cylinder drifts, so use an external rod lock or pilot check valve for held loads. Mounting options include LB foot, FA flange, and TC trunnion (the SDB pivot block is unavailable for double-rods).
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 MID20X25S FAQ
Because it is a double-rod cylinder, force is equal both ways: 131.9 N at 0.5 MPa, 184.7 N at 0.7 MPa, and a maximum theoretical output of 26.9 kgf at 1.0 MPa. It uses a 1/8" port.
No, the piston will drift on air loss. The fixed TPU bumpers only decelerate the stroke end and do not act as a brake. For vertical loads, install an external rod lock or pilot check valve. The stainless build and -S magnet suit washdown sensing.
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