The AirTAC AirTAC SDA50X85 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 SDA50X85 is a double-acting single-rod compact cylinder delivering 981.7 N of push force and 824.7 N of pull force at 0.5 MPa. Its riveted assembly securely joins the barrel, rear cover, piston, and 20 mm rod, yielding a very short axial length that saves valuable mounting depth where a traditional round-body actuator cannot fit. The hard-anodized bore minimizes friction while the two-way piston seal ensures reliable operation across the 30-500 mm/s speed range.
This specific SKU lacks a piston magnet, meaning it cannot support position sensing without upgrading to the -S variant for a reed or electronic switch. End-of-travel deceleration relies strictly on a fixed NBR bumper at each end rather than an adjustable air cushion. Operating pressure spans 0.15-1.0 MPa, and the PT1/4 port matches the 50 mm bore specification exactly.
| Model | AirTAC SDA50X85 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 logistics sorting line, utilizing the 85 mm stroke to redirect parcels weighing up to 50 kg smoothly into the correct outbound lane.
Drives the mechanical arms on a continuous packaging machine to tuck side flaps prior to sealing, saving axial machine space due to the short riveted body design.
Functions as a vertical positioning stop for layer formation in an automated palletizing cell, providing 981.7 N of extend force to hold heavy product layers.
When sizing this actuator, step both directions using real 0.5 MPa push figures: the SDA40 provides 628.3 N if you need a smaller footprint, while the SDA63 offers 1558.6 N for heavier loads. For the SDA50X85, a safe working load is roughly 589 N (about 60% of the 981.7 N figure), translating to a vertical lift capacity of approximately 50 kg with a 2:1 safety margin. Confirm your ordering essentials: 50 mm bore, 85 mm stroke, PT1/4 port, female M10x1.5 rod thread, and no magnet.
Because this is a double-acting cylinder, it will not hold a load if air pressure drops or the valve is centred—the piston drifts until the fixed bumper arrests movement near the stroke end. If your application requires strict position holding without live pressure, you must integrate an external rod lock or a pilot-operated check valve into your pneumatic circuit.
Quick checklist
At 0.5 MPa, the push force is 981.7 N and the pull force is 824.7 N. At 0.7 MPa, the push force is 1374.4 N and the pull force is 1154.5 N. The theoretical maximum push force is 200 kgf at 1.0 MPa, with a proof pressure of 1.5 MPa.
No, this specific SKU does not include a piston magnet, so it cannot support sensing. You would need the -S variant to utilize a reed or electronic switch in the body grooves. Additionally, it uses a fixed NBR bumper for end stops, not an adjustable air cushion.
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