The AirTAC AirTAC SDA50X85S Compact Cylinder | 50mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø50mm bore and 85mm stroke, PT1/4 air ports and a riveted short body that saves mounting depth. Sensor slots around the body accept magnetic switches for position sensing.
The AirTAC SDA50X85S is a double-acting, single-rod compact cylinder engineered to deliver a push force of 981.7 N and a pull force of 824.7 N at 0.5 MPa. Its riveted assembly merges the barrel, rear cover, piston, and rod into a highly shortened axial footprint, conserving valuable machine mounting depth where conventional round-body units cannot fit. The 50 mm bore features a hard-anodized inner wall and a two-way piston seal for reliable pneumatic operation.
Equipped with a built-in piston magnet (the -S option), this model is fully compatible with AirTAC magnetic reed or electronic switches, which seat neatly into the grooves surrounding the body. It features a 20 mm piston rod and a PT1/4 port. End-of-stroke deceleration is handled by a fixed NBR bumper, which absorbs impact energy but is not a field-adjustable air cushion. Operating speed ranges from 30 to 500 mm/s across a 0.15-1.0 MPa pressure range.
| Model | AirTAC SDA50X85S Compact Cylinder | 50mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø50 mm |
| Stroke | 85 mm |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod end thread | M10×1.5 female / M18×1.5 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 | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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. |
|---|---|
| 50 | Bore size in mm. |
| ×85 | 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 routing flap on a high-speed logistics conveyor, utilizing the 85 mm stroke and 981.7 N force to redirect parcels weighing up to 50 kg onto secondary sorting chutes.
Drives the mechanical folding arms on a continuous carton erecting machine, where the compact riveted body minimizes axial intrusion into tight packaging cell frames.
Raises lower-tier product trays in an assembly cell; the built-in magnet triggers electronic switches to confirm the 85 mm lift position, though an external check valve prevents drift under load.
When sizing this unit, evaluate your force requirements against adjacent bores: the SDA40 provides 628.3 N of push force at 0.5 MPa, while the larger SDA63 yields 1558.6 N at the same pressure. For the SDA50X85S, the 981.7 N push at 0.5 MPa translates to a safe working load of roughly 589 N (about 60 percent of capacity) and a vertical lift capability near 50 kg with a 2:1 safety margin. If your mechanism must maintain vertical position upon air loss or valve centering, note that this cylinder will drift; an external rod lock or pilot-operated check valve is required to hold the load. To order, confirm the 50 mm bore, 85 mm stroke, PT1/4 port, female M10x1.5 rod thread, and the required -S magnet option.
Quick checklist
At 0.5 MPa, this double-acting cylinder provides 981.7 N of push force and 824.7 N of pull force. At 0.7 MPa, push increases to 1374.4 N and pull to 1154.5 N. The theoretical maximum push is 200 kgf at the 1.0 MPa operating pressure limit.
It uses a fixed NBR bumper at each end to decelerate the piston near the stroke limits; this is not an adjustable air cushion, so external shock absorbers are advised for high-speed approaches. Additionally, it does not hold its load if air pressure is lost or the valve is centered—an external rod lock or pilot-operated check valve is needed for position holding.
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