The AirTAC SDA20X15S Compact Cylinder | 20mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø20mm bore and 15mm 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 SDA20X15S is a double-acting, single-rod compact cylinder engineered for tight machinery footprints. It delivers 157.1 N of push force and 131.9 N of pull force at 0.5 MPa. The short riveted assembly joins the barrel, rear cover, and piston to minimize axial mounting depth where a standard round-body unit will not fit. This specific configuration includes a built-in piston magnet (-S) for position detection.
The 20 mm bore features an 8 mm piston rod, an M5x0.8 air port, and a female M4x0.7 rod-end thread. Rather than an adjustable air cushion, the piston strikes a fixed NBR bumper at each end to decelerate the stroke. Because the bumper is not a lock or brake, you should add an external shock absorber for high-energy cycles. The integrated magnet supports AirTAC reed or electronic switches mounted in the body grooves.
| Model | AirTAC SDA20X15S Compact Cylinder | 20mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø20 mm |
| Stroke | 15 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. |
| ×15 | 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 needed to actuate the Z-axis plunge on a compact PCB routing spindle, saving axial depth in the electronics manufacturing cell.
Drives the upper heat platen for short 15 mm sealing cycles, using the built-in magnet to trigger an electronic switch for precise dwell time confirmation.
Actuates a micro-dispense nozzle for adhesive application, where the 8 mm rod and short body length minimize interference with adjacent robotic tooling.
This 20 mm bore provides 157.1 N push at 0.5 MPa, sitting between the SDA16 at 100.5 N and the SDA25 at 245.4 N. When ordering, confirm the 15 mm stroke, M5x0.8 port, female M4x0.7 rod thread, and the required -S magnet.
If your application must hold a load without live pressure, note that a plain SDA cylinder drifts when air is lost or the valve is centered. The fixed NBR bumper only decelerates the piston near the stroke end and does not function as a lock. You will need an external rod lock or a pilot-operated check valve to secure the load.
Quick checklist
This double-acting cylinder generates 157.1 N push and 131.9 N pull at 0.5 MPa, and 219.9 N push at 0.7 MPa. The theoretical maximum push force 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.
It relies on a fixed NBR bumper at each end to decelerate the piston, which is not an adjustable air cushion. For high-speed cycles, slow the approach or add an external shock absorber. The included -S magnet works with AirTAC reed or electronic switches fitted into the body grooves.
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