Airtac MID Series Double Rod Mini Cylinder MID40X80S
The AirTAC Airtac MID Series Double Rod Mini Cylinder MID40X80S is a genuine double acting, double rod round-body mini air cylinder with a Ø40mm bore and 80mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke80 mm
- Port size1/4"
- Acting typeDouble acting, double rod
- Rod threadM12×1.25
- CushionFixed TPU bumper pads
About the Airtac MID Series Double Rod Mini Cylinder MID40X80S
Delivering 527.8 N of equal thrust in both directions at 0.5 MPa, this double-acting round-body mini cylinder uses a through-rod design where a piston rod exits both end covers. Because a rod occupies each side, the extend and retract areas are identical, completely eliminating the force differential found in single-rod units. The twin-rod architecture also resists rotation and side load, providing steady guided motion without needing an external guide for heavy tasks. The rear rod end is free to trip a switch, carry a stop, or drive a second load.
Built with a stainless-steel barrel and rod, the riveted construction resists mild corrosion and handles washdown environments. As a larger Ø40 bore, it uses a 1/4" port and M12x1.25 male rod thread, operating outside the ISO 6432 standard. The -S suffix equips the piston with a magnet for CMSG, DMSG, or EMSG sensors. For sizing, a safe working load is roughly 317 N, and it can vertically lift about 26.9 kg each way with a 2:1 safety margin. Fixed TPU bumper pads decelerate the stroke ends, though they will not hold the load if air pressure drops.
Airtac MID Series Double Rod Mini Cylinder MID40X80S Technical Specifications
| Model | Airtac MID Series Double Rod Mini Cylinder MID40X80S |
|---|---|
| Series | MID mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 80 mm |
| Acting type | Double acting, double rod |
| Port size | 1/4" |
| Rod thread | M12×1.25 |
| 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. Note: the Ø40 bore is a larger, non-ISO-6432 size.
Theoretical Output Force (Ø40mm)
| Pressure | Force (both ways) |
|---|---|
| 0.5 MPa | 528 N |
| 0.7 MPa | 739 N |
| Max (@1.0 MPa) | 108 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 MID40X80S
| MID | round-body mini cylinder (double-rod). |
|---|---|
| 40 | Bore size in mm. |
| ×80 | 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 MID40X80S Is Used
Symmetric Shuttle Transfer
Pushes and pulls heavy pallets with equal 527.8 N force, using the twin rod to keep the transfer arm steady and prevent binding under high side loads.
Dual-End Actuation Station
Drives a primary stamping tool on the front stroke while the extending rear rod trips a mechanical limit switch to sequence the next machine action.
Vertical Lift Gate
Raises and lowers a 26 kg material gate with a 2:1 safety margin, relying on the through-rod to resist twisting during guided vertical movement.
Is the Airtac MID Series Double Rod Mini Cylinder MID40X80S the Right Cylinder?
When sizing this actuator, compare its 527.8 N output at 0.5 MPa against adjacent bores. Stepping down to a Ø32 MID yields 345.6 N, while this Ø40 provides the maximum thrust available in the series at 738.9 N at 0.7 MPa. Choose this model when your application demands high equal-force pushing and pulling, or when the twin rod is needed to prevent rotation and drive a secondary load from the back end. Keep in mind the piston will drift on air loss, as the fixed TPU bumpers only soften the stroke end rather than locking the load; utilize an external rod lock or pilot check valve for holding.
Mounting options include LB foot, FA flange, and TC trunnion brackets, but the SDB pivot block is not compatible with this double-rod variant. Back covers are available in CA, U, R, and CM styles. Because this is an -S model, you can directly mount CMSG, DMSG, or EMSG switches for position sensing.
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 MID40X80S FAQ
Because it is a double-rod cylinder, the force is equal both ways: 527.8 N at 0.5 MPa and 738.9 N at 0.7 MPa. The maximum theoretical force at 1.0 MPa is 107.6 kgf. It uses a 1/4" port.
Yes, the -S suffix means it has a built-in magnet for CMSG, DMSG, or EMSG sensors. However, it cannot hold a load on air loss; the fixed TPU bumpers only decelerate the stroke end, so you need an external rod lock for holding.
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