The AirTAC AirTAC SDA20X35SH 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 SDA20X35SH is a double-acting, single-rod compact cylinder engineered for tight machinery layouts. It generates 157.1 N of push force and 131.9 N of pull force at 0.5 MPa. The short riveted body significantly reduces axial mounting depth compared to conventional round-body units, making it ideal for space-constrained footprints. This specific configuration includes an FKM fluororubber seal for enhanced thermal and oil resistance.
Equipped with a built-in piston magnet (-S), the body features integrated grooves that accept AirTAC reed or electronic switches for precise position sensing. The 8 mm piston rod utilizes an M4x0.7 female thread, and end-stroke deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion.
| Model | AirTAC SDA20X35SH 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).
Actuates the tooling head on an electronics assembly line, utilizing the 35 mm stroke and FKM seals to resist flux vapors while handling the 94 N safe working load.
Pushes lightweight parcels onto secondary chutes in logistics hubs, where the short riveted body minimizes frame protrusion and the magnetic sensor confirms stroke completion.
Provides the 157.1 N clamping force at 0.5 MPa to close sealing dies, with the fixed NBR bumper absorbing the end impact during continuous high-cycle packaging runs.
When sizing this unit, evaluate your force margins carefully. 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. For this 20 mm bore, the safe working load is approximately 94 N (about 60% of the 157.1 N figure), translating to a vertical lift capacity of roughly 8 kg with a 2:1 safety margin. Confirm your ordering essentials: 20 mm bore, 35 mm stroke, M5x0.8 port, female rod thread, FKM seals, and the required magnetic switch.
Remember that a standard compact cylinder does not hold its position if air pressure drops or the valve is centered; the piston will drift. The fixed NBR bumper only decelerates the stroke near the end limits and acts neither as a lock nor a brake. If your application demands secure load holding without live pressure, you must integrate an external rod lock or a pilot-operated check valve.
Quick checklist
At 0.5 MPa, this double-acting cylinder provides 157.1 N of push force and 131.9 N of pull force. At 0.7 MPa, push increases to 219.9 N and pull to 184.7 N. The theoretical maximum push is 32 kgf at 1.0 MPa. Operating pressure ranges from 0.15 to 1.0 MPa, with a proof pressure of 1.5 MPa and a speed range of 30-500 mm/s.
No, end-of-stroke deceleration relies solely on a fixed NBR bumper, which is not field-adjustable; for high-speed approaches, add an external shock absorber. Additionally, this cylinder does not hold its load if air is lost or the valve is centered—the piston will drift. Use a pilot-operated check valve or external rod lock for position holding.
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