The AirTAC AirTAC SDA20X25BH 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 SDA20X25BH is a double-acting, single-rod compact cylinder engineered for tight axial spaces. A riveted assembly unites the barrel, rear cover, piston, and rod, yielding a minimal footprint compared to conventional round-body units. Operating at 0.5 MPa, it generates 157.1 N of push force and 131.9 N of pull force. This specific SKU features an FKM fluororubber seal for enhanced thermal and oil resistance, alongside a male M6x1.0 threaded piston rod end.
The 8 mm piston rod is supported by a hard-anodized bore, and end-stroke deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion. Because this configuration lacks the -S magnet option, it cannot directly mount AirTAC reed or electronic switches. Operating speed spans 30-500 mm/s across a 0.15-1.0 MPa pressure range.
| Model | AirTAC SDA20X25BH 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 tool feed on an electronics assembly line, where the short 25 mm stroke and compact body depth fit neatly within the machine enclosure.
Provides the 157.1 N push force required to close a small heated platen, with FKM seals enduring elevated ambient temperatures near the sealing element.
Drives a precision metering valve for adhesive application, utilizing the male M6x1.0 rod end to securely thread into the valve actuator mount.
When sizing this 20 mm bore, 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 157.1 N output, the safe working load is approximately 94 N (about 60% of the 0.5 MPa figure), translating to a vertical lift capacity of roughly 8 kg with a 2:1 safety margin. Ensure your ordering essentials match this exact configuration: 20 mm bore, 25 mm stroke, M5x0.8 port, male M6x1.0 rod thread (B), FKM seals (H), and no sensor magnet.
Note that a standard compact actuator does not hold its position if air pressure drops or the valve is centered. The piston will drift, and the fixed NBR bumper only decelerates the stroke near its end without acting as a mechanical lock. If your application requires load holding without live pressure, you must integrate an external rod lock or a pilot-operated check valve.
Quick checklist
This double-acting cylinder provides 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. It operates on filtered air at 0.15-1.0 MPa, with a proof pressure of 1.5 MPa, and supports a speed range of 30-500 mm/s.
No. This model relies on a fixed NBR bumper at each end to decelerate the stroke, which is not a field-adjustable air cushion. Additionally, because this SKU lacks the -S magnet option, it cannot support AirTAC reed or electronic switches. For high-speed applications, you should add an external shock absorber.
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