The AirTAC AirTAC SDA20X25SN 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 SDA20X25SN 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 short riveted body integrates the barrel, rear cover, piston, and rod into a highly space-efficient package, significantly reducing axial mounting depth compared to standard round-body units. The 8 mm piston rod features a female M4x0.7 thread end for straightforward load coupling.
Because this configuration includes the S option, it contains a built-in piston magnet compatible with AirTAC reed or electronic switches mounted in the body grooves. End-stopping relies on a fixed NBR bumper rather than an adjustable air cushion, meaning operators should slow the approach or add external shock absorbers for high-energy cycles. Operating speed spans 30-500 mm/s within a 0.15-1.0 MPa pressure range.
| Model | AirTAC SDA20X25SN 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).
Provides the precise 157.1 N extension needed to push singulated circuit boards out of routing fixtures without damaging delicate traces.
Actuates folding mechanisms on compact packaging lines where the 25 mm stroke and space-saving riveted body keep the machine footprint narrow.
Drives a 8 mm rod to actuate a micro-valve for liquid reagent dosing, utilizing the 30-500 mm/s speed range for controlled metering.
Selecting this 20 mm bore provides a safe working load of roughly 94 N (about 60% of the 157.1 N push at 0.5 MPa), translating to a vertical lift capacity of approximately 8 kg with a 2:1 safety margin. If your application requires less force, the SDA16 offers 100.5 N of push at 0.5 MPa; stepping up to the SDA25 yields 245.4 N at the same pressure. Confirm your ordering essentials: 20 mm bore, 25 mm stroke, M5x0.8 port, built-in magnet (S), and female rod thread. Note that a plain compact cylinder drifts when air is lost or the valve is centered, so an external rod lock or pilot-operated check valve is required to hold a load securely.
Quick checklist
This double-acting cylinder generates 157.1 N push and 131.9 N pull at 0.5 MPa, increasing to 219.9 N push and 184.7 N pull at 0.7 MPa. The theoretical maximum push is 32 kgf at 1.0 MPa. It operates on filtered air between 0.15-1.0 MPa, with a proof pressure of 1.5 MPa, and functions in temperatures from -20 to +70 C.
No. End-of-stroke deceleration is handled by a fixed NBR bumper, not a field-adjustable air cushion, so external shock absorbers are recommended for high-speed impacts. Additionally, the piston will drift if air pressure is lost or the valve is centered; maintaining a vertical load requires an external rod lock or pilot-operated check valve.
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