The AirTAC AirTAC SDA20X70 Compact Cylinder | 20mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø20mm bore and 70mm stroke, M5×0.8 air ports and a riveted short body that saves mounting depth. Sensor slots around the body accept magnetic switches for position sensing.
The AirTAC SDA20X70 is a double-acting single-rod compact cylinder engineered to deliver 157.1 N of push force and 131.9 N of pull force at 0.5 MPa. Its riveted assembly unites the barrel, rear cover, piston, and rod into a highly abbreviated unit, drastically reducing axial mounting depth where a conventional round-body actuator would be too long. The hard-anodized bore interior minimizes friction, while the integrated fixed NBR bumpers absorb kinetic energy at the stroke extremes.
This specific configuration features a 70 mm stroke, an 8 mm piston rod, and M5x0.8 air ports. Because this SKU lacks the -S suffix, it has no internal piston magnet and cannot support position sensing. If your application requires end-of-stroke feedback, you would need to specify the SDA20X70S variant to accept reed or electronic switches in the body grooves.
| Model | AirTAC SDA20X70 Compact Cylinder | 20mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø20 mm |
| Stroke | 70 mm |
| Acting type | Double acting |
| Port size | M5×0.8 |
| Rod end thread | M4×0.7 female / M6×1.0 male (B) |
| 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 – 500 mm/s |
| Cushion | Fixed NBR bumper (both ends) |
| Max standard stroke | Up to 90 mm |
Specifications follow the official AirTAC SDA compact-cylinder datasheet. Confirm against the product label before installation. Port thread: PT (standard). Rod: female thread (blank) / male thread (B).
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | — |
| Max (@1.0 MPa) | 32 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
| SDA | Compact (thin) double-acting cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×70 | Stroke length in mm. |
| S | Built-in magnet for magnetic-switch position sensing (omit = no magnet). |
| B | Male-thread piston rod (omit = female-thread rod). |
Thread: PT standard. Related SDA-family variants: SSA (single-acting push), STA (single-acting pull), SDAD (double rod), SDAJ (adjustable stroke), SDAT (duplex), SDAW (duplex-end).
Provides the 157.1 N push at 0.5 MPa needed to actuate the Z-axis plunge on a depaneling router, utilizing the 70 mm stroke to clear the spindle housing during tool changes.
Drives the folding mechanism on a top-seal carton erector, where the short riveted body saves axial space along a narrow 100 mm frame rail without sacrificing the 8 mm rod coupling strength.
Moves a volumetric pipette head between reagent wells, operating at 30-500 mm/s. The fixed NBR bumpers quietly absorb the 70 mm stroke stops to prevent liquid splashing.
When sizing this 20 mm bore actuator, evaluate your force margins carefully. If you need less push, stepping down to the SDA16 yields 100.5 N at 0.5 MPa; if your payload is heavier, stepping up to the SDA25 provides 245.4 N at 0.5 MPa. For the SDA20X70, a safe working load is approximately 94 N (about 60% of the 157.1 N figure), which translates to a vertical lift capacity of roughly 8 kg with a 2:1 safety margin. Confirm your ordering essentials: 20 mm bore, 70 mm stroke, M5x0.8 port, female rod thread (M4x0.7), and no magnet.
Keep in mind that a standard compact cylinder does not hold its position if air pressure drops or the directional valve is centered. The piston will drift, and the fixed NBR bumper only decelerates the load near the end of travel—it is not a locking brake. For vertical or suspended loads that must remain in place during an air loss event, you must integrate an external rod lock or a pilot-operated check valve into your pneumatic circuit.
Quick checklist
The SDA20X70 generates 157.1 N push and 131.9 N pull at 0.5 MPa. At 0.7 MPa, push increases to 219.9 N. The theoretical maximum push force is 32 kgf at 1.0 MPa, with a proof pressure rating of 1.5 MPa.
No, this model uses fixed NBR bumpers at each end rather than an adjustable air cushion, so for high-energy cycles you should slow the approach or add an external shock absorber. Additionally, because this SKU lacks the -S magnet option, it cannot detect position; you would need to order the SDA20X70S to use reed or electronic switches.
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