The AirTAC AirTAC SDA40X20N Compact Cylinder | 40mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø40mm bore and 20mm stroke, PT1/8 air ports and a riveted short body that saves mounting depth. Sensor slots around the body accept magnetic switches for position sensing.
The AirTAC SDA40X20N is a double-acting single-rod compact cylinder engineered for tight machinery footprints. Its riveted assembly minimizes axial length, while the hard-anodized 40 mm bore yields 628.3 N of push force at 0.5 MPa. A 16 mm piston rod threads via a female M8x1.25 end to drive the load.
End-stops rely on a fixed NBR bumper rather than an adjustable air cushion, meaning high-energy cycles require external shock absorbers. This specific SKU lacks a piston magnet, so position sensing is not supported without upgrading to the -S variant.
| Model | AirTAC SDA40X20N Compact Cylinder | 40mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø40 mm |
| Stroke | 20 mm |
| Acting type | Double acting |
| Port size | PT1/8 |
| Rod end thread | M8×1.25 female / M14×1.5 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 120 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 | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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. |
|---|---|
| 40 | Bore size in mm. |
| ×20 | 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).
Secures aluminum housings inside machining centers, delivering 628.3 N of extension force to prevent part shift during milling operations.
Deploys a 20 mm stroke to tuck corrugated box flaps prior to tape sealing, fitting neatly within narrow packaging line frames.
Pushes molded plastic parts out of press dies, using the fixed NBR bumper to absorb impact at the end of the ejection cycle.
When sizing this 40 mm bore, stepping down to the SDA32 yields 402.1 N push at 0.5 MPa, whereas stepping up to the SDA50 provides 981.7 N. For this 20 mm stroke unit, a safe working load is roughly 377 N (about 60% of the 0.5 MPa figure), allowing a vertical lift of approximately 32 kg with a 2:1 safety margin.
Confirm your ordering essentials: 40 mm bore, 20 mm stroke, PT1/8 port, female rod thread, and no sensor magnet. Note that a standard cylinder drifts if air pressure drops; holding a suspended load requires an external rod lock or pilot-operated check valve.
Quick checklist
This double-acting cylinder generates 628.3 N push and 527.8 N pull at 0.5 MPa, or 879.6 N push and 738.9 N pull at 0.7 MPa. The theoretical maximum push is 128 kgf at 1.0 MPa. Operating pressure ranges from 0.15-1.0 MPa, with a speed of 30-500 mm/s.
No, this specific SKU does not include a piston magnet. To use AirTAC reed or electronic switches in the body grooves, you must specify the -S option. Additionally, end-of-stroke deceleration is handled by a fixed NBR bumper, not an adjustable cushion.
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