The AirTAC AirTAC SDA20X45B Compact Cylinder | 20mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø20mm bore and 45mm 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 SDA20X45B 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 significantly shortens the overall axial footprint compared to conventional round-body units, making it highly effective for machinery where mounting depth is restricted. This specific SKU features a male M6x1.0 threaded piston rod for direct load coupling.
The bore interior is hard-anodized and uses a two-way piston seal operating at speeds of 30-500 mm/s. End-of-travel deceleration is handled strictly by fixed NBR bumpers rather than adjustable air cushions. Because this configuration lacks the -S magnet option, it cannot support magnetic position sensing without changing the base model.
| Model | AirTAC SDA20X45B Compact Cylinder | 20mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø20 mm |
| Stroke | 45 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. |
| ×45 | 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 stroke to eject cut circuit boards from a routing fixture without occupying excessive vertical machine envelope.
Utilizes the 45 mm stroke and male M6x1.0 rod end to drive short mechanical folders that tuck minor flaps prior to case sealing.
Actuates a lightweight routing paddle on a packaging line, taking advantage of the short riveted body to fit within tight conveyor side frames.
When sizing this 20 mm bore actuator, stepping down to the SDA16 yields 100.5 N of push force at 0.5 MPa, while stepping up to the SDA25 provides 245.4 N. For this current 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, 45 mm stroke, M5x0.8 port, male M6x1.0 rod thread, and no sensor magnet.
Remember that a standard compact cylinder does not inherently hold its position if air pressure drops or the directional valve is centered. The piston will drift under load, as the NBR bumper only absorbs impact energy near the stroke endpoints rather than acting as a mechanical lock. If your application requires strict load holding on air loss, 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 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.
No. This model uses fixed NBR bumpers at both ends to decelerate the piston, which cannot be field-adjusted like an air cushion. Additionally, because this SKU lacks the -S magnet option, it cannot accept AirTAC reed or electronic switches; you would need to specify an SDA20X45BS variant for position sensing.
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