The AirTAC AirTAC SDA20X25SB Compact Cylinder | 20mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø20mm bore and 25mm 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 SDA20X25SB 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 a highly shortened axial footprint, making it ideal for machinery where a traditional round-body unit would protrude excessively. The 8 mm piston rod features a male M6x1.0 thread end for direct load coupling, and the hard-anodized bore ensures durable, low-friction operation.
Because this configuration includes the -S option, a built-in piston magnet enables position sensing via an AirTAC reed or electronic switch seated in the body grooves. Instead of an adjustable air cushion, the unit relies on a fixed NBR bumper at each end to decelerate the stroke. Operating speeds span 30-500 mm/s, and the 25 mm stroke is well within the 100 mm standard limit for this 20 mm bore size.
| Model | AirTAC SDA20X25SB Compact Cylinder | 20mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø20 mm |
| Stroke | 25 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. |
| ×25 | 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 cutting head feed on an electronic board depaneling machine, utilizing the 25 mm stroke and male M6 rod to push the spindle assembly smoothly through programmed cuts.
Provides the 157.1 N clamping force required to hold aluminum lid foil against plastic blister cavities during heat sealing, fitting neatly within the narrow frame of the packaging line.
Drives a short diverter arm on a logistics conveyor to push small parcels into chutes, using the integrated magnet to confirm gate position via a reed or electronic switch.
When sizing this unit, consider stepping down to the SDA16, which provides 100.5 N of push at 0.5 MPa, or moving up to the SDA25, which yields 245.4 N at the same pressure. Based on the 157.1 N output, the safe working load is roughly 94 N (about 60% capacity), translating to a vertical lift capability of approximately 8 kg with a 2:1 safety margin. Keep in mind that a plain compact cylinder drifts when air pressure is lost or the valve is centered; the fixed bumper only decelerates near the stroke end and does not function as a lock. For suspended loads, integrate an external rod lock or a pilot-operated check valve. To order, confirm the 20 mm bore, 25 mm stroke, M5x0.8 port, built-in magnet (S), and male-thread rod (B).
Quick checklist
At 0.5 MPa, the push force is 157.1 N and the pull force is 131.9 N. At 0.7 MPa, the push force is 219.9 N and the pull force is 184.7 N. The theoretical maximum push force is 32 kgf at 1.0 MPa. The operating pressure range is 0.15-1.0 MPa, with a proof pressure of 1.5 MPa, and the operating speed ranges from 30-500 mm/s.
No, it uses a fixed NBR bumper at each end to decelerate the piston near stroke completion; it is not an adjustable air cushion. Additionally, because this model includes the -B option, the 8 mm rod end features a male M6x1.0 thread instead of the standard female M4x0.7 thread.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.