The AirTAC AirTAC SDA20X40B Compact Cylinder | 20mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø20mm bore and 40mm 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 SDA20X40B 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 unit, saving substantial axial mounting depth in tight machinery layouts. The bore is hard-anodized, and the piston relies on a two-way seal for efficient actuation.
This specific SKU features a male-thread M6x1.0 piston rod end for secure mechanical coupling to your load, contrasting with the standard female M4x0.7 thread. End-of-travel deceleration is handled by 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. Because this configuration lacks the -S magnet code, it cannot host AirTAC reed or electronic switches.
| Model | AirTAC SDA20X40B Compact Cylinder | 20mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø20 mm |
| Stroke | 40 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. |
| ×40 | 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 a linear blade or router carriage in electronics assembly equipment, utilizing the 40 mm stroke and 157.1 N force to cleanly separate printed circuit boards without excessive footprint.
Drives a short mechanical arm to tuck minor flaps on packaging lines, where the compact riveted body minimizes axial length and the male M6x1.0 rod end secures the folding bracket.
Pushes tested vials out of a centrifuge carousel using a 40 mm extension, relying on the fixed NBR bumper to soften the end stop in high-cycling diagnostic instruments.
When sizing this actuator, evaluate your force requirements carefully. Stepping down to the SDA16 yields 100.5 N of push at 0.5 MPa, while moving up to the SDA25 provides 245.4 N. The 20 mm bore here offers a safe working load of roughly 94 N (about 60% of the 157.1 N figure) and can vertically lift approximately 8 kg with a 2:1 safety margin. If your mechanism must maintain vertical position during air loss or valve centering, note that the piston will drift; an external rod lock or pilot-operated check valve is required to hold the load.
To finalize your order, confirm these exact specifications: 20 mm bore, 40 mm stroke, M5x0.8 air port, male M6x1.0 rod thread (indicated by the B suffix), and no piston magnet. Operating speed spans 30-500 mm/s across a 0.15-1.0 MPa pressure range.
Quick checklist
This double-acting 20 mm bore cylinder generates 157.1 N push and 131.9 N pull at 0.5 MPa. At 0.7 MPa, push increases to 219.9 N and pull to 184.7 N. The theoretical maximum push is 32 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa, proof pressure is 1.5 MPa, and the speed range is 30-500 mm/s.
No, it uses a fixed NBR bumper at each end to decelerate the stroke, which is not a field-adjustable air cushion or a locking brake. Additionally, this specific SKU lacks the -S magnet, so it cannot support reed or electronic switches; you would need the SDA20X40BS variant for position sensing.
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.