Airtac MID Series Double Rod Mini Cylinder MID32X40S
The AirTAC Airtac MID Series Double Rod Mini Cylinder MID32X40S is a genuine double acting, double rod round-body mini air cylinder with a Ø32mm bore and 40mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ32 mm
- Stroke40 mm
- Port size1/4"
- Acting typeDouble acting, double rod
- Rod threadM10×1.25
- CushionFixed TPU bumper pads
About the Airtac MID Series Double Rod Mini Cylinder MID32X40S
Delivering 345.6 N of thrust at 0.5 MPa in both directions, this AirTAC 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 forces are identical at 345.6 N, eliminating the pressure differential found in single-rod units. The twin-rod architecture inherently resists rotation and side loads, providing steadier guiding for light jobs without needing an external guide rail. The rear rod end remains free to trip a switch or carry a stop.
Built with a stainless-steel barrel and rod, the riveted construction offers mild corrosion and washdown resistance. It operates at speeds from 30-800 mm/s, actuated via a 1/4 inch port. Because this is a -S model, it includes a built-in piston magnet for CMSG, DMSG, or EMSG switches. For sizing context, the safe working load is approximately 207 N, which translates to a vertical lift capacity of about 17.6 kg each way when applying a 2:1 safety margin.
Airtac MID Series Double Rod Mini Cylinder MID32X40S Technical Specifications
| Model | Airtac MID Series Double Rod Mini Cylinder MID32X40S |
|---|---|
| Series | MID mini cylinder |
| Bore size | Ø32 mm |
| Stroke | 40 mm |
| Acting type | Double acting, double rod |
| Port size | 1/4" |
| 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. Note: the Ø32 bore is a larger, non-ISO-6432 size.
Theoretical Output Force (Ø32mm)
| Pressure | Force (both ways) |
|---|---|
| 0.5 MPa | 346 N |
| 0.7 MPa | 484 N |
| Max (@1.0 MPa) | 70 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 MID32X40S
| MID | round-body mini cylinder (double-rod). |
|---|---|
| 32 | 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 MID32X40S Is Used
Guided Stamping Press
With 345.6 N of equal force both ways, it drives a small marking stamp while the twin rod resists rotation for precise, repeatable indents without an external guide.
Symmetric Shuttle Divert
The through-rod design moves a diverter arm on the front stroke and trips a rear limit switch on the return, ideal for shifting 17.6 kg cartons at 0.5 MPa.
Washdown Test Fixture
The stainless steel barrel and rod withstand mild washdown environments, clamping test samples with 483.8 N at 0.7 MPa while maintaining steady alignment.
Is the Airtac MID Series Double Rod Mini Cylinder MID32X40S the Right Cylinder?
When sizing this 32 mm bore, consider that a smaller MID25 provides 206.1 N at 0.5 MPa, while stepping up to the larger MID40 yields 527.8 N. This model fits applications needing roughly 345.6 N of equal bidirectional force. The through-rod design is specifically beneficial when you need anti-rotation stability, a back-rod switch trip, or symmetric shuttle movements. Note that the fixed TPU bumper pads only soften the stroke end; they do not lock the piston. If your application must hold a load during air loss, you must add an external rod lock or pilot-operated check valve, as the cylinder will drift. Mounting options include LB foot, FA flange, and TC trunnion brackets, but the SDB pivot-block is not available on this double-rod variant. Position sensing is enabled via the internal magnet using 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 MID32X40S FAQ
It delivers equal force both ways because the double-rod design uses the rod-side area on both faces. It provides 345.6 N at 0.5 MPa, 483.8 N at 0.7 MPa, and a maximum theoretical force of 70.5 kgf at 1.0 MPa.
Yes, the -S suffix indicates a built-in piston magnet, allowing you to mount CMSG, DMSG, or EMSG switches for reed or electronic sensing. The stainless build also provides mild corrosion resistance.
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