Airtac MID Series Double Rod Mini Cylinder MID20X40S
The AirTAC Airtac MID Series Double Rod Mini Cylinder MID20X40S is a genuine double acting, double rod round-body mini air cylinder with a Ø20mm 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.
- BoreØ20 mm
- Stroke40 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 MID20X40S
Delivering 131.9 N of thrust at 0.5 MPa in both directions, the AirTAC MID20X40S is a round-body, double-acting mini cylinder built with a stainless-steel barrel and rod for mild washdown resistance. Because a piston rod exits both end covers, the extend and retract areas are identical, ensuring equal force while the twin-rod geometry naturally resists rotation and side loads without needing an external guide.
This 20 mm bore unit uses a 1/8" port and conforms to the ISO 6432 mounting interface for easy bracket integration. The rear rod extension is free to carry a stop or trip a switch, and the -S suffix denotes a built-in magnet for CMSG, DMSG or EMSG sensors. For sizing, its 131.9 N output translates to a safe working load of roughly 79 N, or a vertical lift of about 6.7 kg with a 2:1 safety margin.
Airtac MID Series Double Rod Mini Cylinder MID20X40S Technical Specifications
| Model | Airtac MID Series Double Rod Mini Cylinder MID20X40S |
|---|---|
| Series | MID ISO 6432 mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 40 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 MID20X40S
| MID | ISO 6432 round-body mini cylinder (double-rod). |
|---|---|
| 20 | 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 MID20X40S Is Used
Symmetric Shuttle Transfer
With 131.9 N of equal force each way, this cylinder smoothly pushes a light product carrier left and right without requiring an external guide rail.
Back-Rod Switch Trip
The extended rear rod provides a convenient mounting point to physically trigger a limit switch or carry a visual position flag at 40 mm stroke.
Guided Pin Insertion
The anti-rotation property of the twin rod keeps the tooling steady, delivering roughly 79 N of safe working force to press pins into mild housings.
Is the Airtac MID Series Double Rod Mini Cylinder MID20X40S the Right Cylinder?
If you need less push, the MID16 bore drops the 0.5 MPa force to 86.4 N; if your payload is heavier, stepping up to the MID25 yields 206.1 N. The through-rod design is ideal when you need steady guided pushes, a back-rod stop, or symmetric shuttle movements. Remember that the fixed TPU bumper pads only soften the stroke end and do not lock the piston—air loss will cause drift, so fit an external rod lock or pilot check valve for held loads. You can use LB, FA or TC mounts (the SDB pivot block is not offered on this double-rod variant), and the -S magnet pairs directly with CMSG, DMSG or EMSG switches.
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 MID20X40S FAQ
It delivers equal force in both directions because a rod exits both ends: 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.
Yes, the -S suffix means it has a built-in piston magnet, allowing you to fit CMSG, DMSG or EMSG switches. The stainless steel construction also provides mild corrosion resistance.
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1-Year Warranty
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