The AirTAC AirTAC SDA20X35SB Compact Cylinder | 20mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø20mm bore and 35mm 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 SDA20X35SB 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 merges the barrel, rear cover, piston, and rod into an ultra-short unit, saving valuable axial mounting depth in tight machine layouts. The bore is hard-anodized and utilizes a two-way piston seal for reliable pneumatic performance.
This specific configuration includes a built-in piston magnet for position detection alongside a male M6x1.0 threaded rod end for direct load coupling. End-of-stroke deceleration is handled by a fixed NBR bumper at each end, which absorbs impact energy but is not a field-adjustable air cushion. The body features integrated grooves that accept AirTAC reed or electronic switches, operating at speeds from 30 to 500 mm/s.
| Model | AirTAC SDA20X35SB Compact Cylinder | 20mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø20 mm |
| Stroke | 35 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. |
| ×35 | 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 force required to clamp populated circuit boards during automated routing, with the male M6 rod end securing the tooling bracket.
Cycles the 35 mm stroke to close sealing jaws on medical blister packaging lines, where the short riveted body minimizes axial footprint.
Actuates a lightweight diverter arm on a parcel conveyor, using the built-in magnet and an electronic switch to confirm gate position.
When sizing this 20 mm bore actuator, stepping down to the SDA16 yields 100.5 N of push at 0.5 MPa, while stepping up to the SDA25 provides 245.4 N at the same pressure. Based on the 157.1 N output, the computed safe working load is approximately 94 N (about 60% of capacity), translating to a vertical lift capability of roughly 8 kg with a 2:1 safety margin. Keep in mind that a standard compact cylinder does not hold its position if air pressure drops or the valve is centered; the piston will drift, and the fixed bumper only decelerates it near the stroke end. For applications requiring a held load, an external rod lock or pilot-operated check valve is necessary.
To finalize your order, confirm the 20 mm bore, 35 mm stroke, M5x0.8 port, and the SB options: the S magnet for sensing and the B male M6x1.0 piston rod thread. Avoid imposing side loads on the 8 mm rod to prevent premature wear.
Quick checklist
At 0.5 MPa, this 20 mm bore cylinder provides 157.1 N of push force and 131.9 N of pull force. At 0.7 MPa, the push increases to 219.9 N and the pull to 184.7 N. The theoretical maximum push is 32 kgf at 1.0 MPa. It operates between 0.15 and 1.0 MPa, with a proof pressure of 1.5 MPa, and functions in temperatures from -20 to +70 C.
No, it uses a fixed NBR bumper at each end to decelerate the stroke, which is not a field-adjustable air cushion. For high-speed or high-energy cycles, you should add an external shock absorber or slow the approach. Additionally, it does not hold its load if air is lost; the piston will drift, so an external rod lock or pilot-operated check valve is required for position holding.
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