Airtac MID Series Double Rod Mini Cylinder MID20X50STC
The AirTAC Airtac MID Series Double Rod Mini Cylinder MID20X50STC is a genuine double acting, double rod round-body mini air cylinder with a Ø20mm bore and 50mm 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
- Stroke50 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 MID20X50STC
Delivering 131.9 N of thrust at 0.5 MPa in both directions, the AirTAC MID20X50STC is a double-acting, through-rod mini cylinder built for balanced actuation. Because a rod exits both end covers, the extend and retract forces are identical, and the twin rod resists rotation and side load for steadier guiding without an external guide. The stainless-steel round barrel and piston rod provide mild corrosion and washdown resistance.
This Ø20 mm bore unit uses a 1/8" port and an M8x1.25 male rod thread, running at speeds of 30-800 mm/s. It conforms to the ISO 6432 mounting interface for standard mini brackets. The -S suffix means a piston magnet is built in for CMSG, DMSG or EMSG switches. For sizing, its safe working load is about 79 N, meaning it can vertically lift roughly 6.7 kg each way with a 2:1 safety margin.
Airtac MID Series Double Rod Mini Cylinder MID20X50STC Technical Specifications
| Model | Airtac MID Series Double Rod Mini Cylinder MID20X50STC |
|---|---|
| Series | MID ISO 6432 mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 50 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 MID20X50STC
| MID | ISO 6432 round-body mini cylinder (double-rod). |
|---|---|
| 20 | Bore size in mm. |
| ×50 | 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 MID20X50STC Is Used
Symmetric Shuttle Transfer
Pushing and pulling a light parts shuttle with equal 131.9 N force keeps cycle times consistent without favoring one direction.
Rear-Rod Switch Trip
The extended back rod physically trips an external limit switch or carries a flag, confirming position without loading the main work end.
Twist-Resistant Guiding
Moving a 6.7 kg vertical fixture is steadier because the twin through-rod resists torsional twist and side load better than a single rod.
Is the Airtac MID Series Double Rod Mini Cylinder MID20X50STC the Right Cylinder?
If your task needs less force, the MID16 bore provides 86.4 N at 0.5 MPa; stepping up to the MID25 yields 206.1 N. The MID20X50STC fits perfectly when you need equal force both ways and anti-rotation stability. The rear rod end is free to carry a stop, trip a switch, or drive a second load. The TC trunnion mount is available, but the SDB pivot-block is not offered on this double-rod variant.
Note that fixed TPU bumper pads only decelerate the stroke end; they do not lock the piston. If air is lost, the cylinder drifts, so use an external rod lock or pilot check valve for held loads. Switches require the -S magnet, which this model includes.
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 MID20X50STC FAQ
Because it is a double-rod cylinder, the force is equal both ways. It delivers 131.9 N at 0.5 MPa, 184.7 N at 0.7 MPa, and a maximum 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 soften the stroke end and are not a lock. You need an external rod lock or pilot check valve to hold a load. The -S magnet allows CMSG/DMSG/EMSG sensors.
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