Airtac MID Series Double Rod Mini Cylinder MID40X30
The AirTAC Airtac MID Series Double Rod Mini Cylinder MID40X30 is a genuine double acting, double rod round-body mini air cylinder with a Ø40mm bore and 30mm stroke, 1/4" air ports and a stainless-steel barrel and rod for mildly corrosive environments.
- BoreØ40 mm
- Stroke30 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 MID40X30
Delivering 527.8 N of equal force in both directions, this AirTAC MID40X30 is a robust round-body mini cylinder built for demanding symmetry. As a double-acting, double-rod unit, a stainless piston rod exits both end covers. This ensures extend and retract thrust remain identical while the twin-rod geometry naturally resists rotation and side loads without needing an external guide.
The stainless-steel barrel and rod offer reliable mild corrosion and washdown resistance. Because a rod occupies each side, both faces use the rod-side area, yielding 527.8 N at 0.5 MPa and 738.9 N at 0.7 MPa. The 1/4" port feeds air at speeds of 30-800 mm/s. For buyers, this translates to a safe working load of roughly 317 N, or a vertical lift capacity of about 26.9 kg with a 2:1 safety margin.
Airtac MID Series Double Rod Mini Cylinder MID40X30 Technical Specifications
| Model | Airtac MID Series Double Rod Mini Cylinder MID40X30 |
|---|---|
| Series | MID mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 30 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 MID40X30
| MID | round-body mini cylinder (double-rod). |
|---|---|
| 40 | Bore size in mm. |
| ×30 | 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 MID40X30 Is Used
Symmetric Shuttle Transfer
Moves heavy jigs back and forth on a conveyor using the 527.8 N equal force, relying on the twin rod to prevent twisting during rapid reversals.
Guided Stamping Press
Delivers steady downward pressure for light stamping tasks, where the through-rod design keeps the tool plumb without needing an external guide bushing.
Dual-Action Ejector
Uses the exposed back rod end to trip a mechanical limit switch while simultaneously pushing a 25 kg workpiece off an assembly fixture.
Is the Airtac MID Series Double Rod Mini Cylinder MID40X30 the Right Cylinder?
When sizing this 40 mm bore, stepping down to a MID32 yields 345.6 N at 0.5 MPa, while no larger MID bore exists. Choose this 40 mm model when your application requires substantial equal-both-ways force and inherent anti-rotation stability. The rear rod end is perfectly positioned to trip a switch or carry a mechanical stop.
Note that this SKU lacks the -S magnet, so it cannot host CMSG, DMSG, or EMSG sensors. Mount via LB foot, FA flange, or TC trunnion (the SDB pivot-block is unavailable for double-rods). Remember that fixed TPU bumper pads only soften stroke ends; they do not lock the piston. For holding a load on air loss, install an external rod lock or pilot check valve.
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 MID40X30 FAQ
The force is equal both ways because a rod exits each end. It provides 527.8 N at 0.5 MPa, 738.9 N at 0.7 MPa, and a maximum theoretical force of 107.6 kgf at 1.0 MPa.
No, this specific SKU does not include a magnet, so CMSG, DMSG, or EMSG sensors cannot be used. You would need the -S variant for sensing. The stainless build resists mild corrosion, and the double rod provides excellent anti-rotation.
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Covers non-human-caused product damage.
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