The AirTAC AirTAC SDA50X85B 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 SDA50X85B is a double-acting, single-rod compact cylinder engineered to deliver a robust 981.7 N of push force at 0.5 MPa. Its riveted body assembly significantly reduces axial mounting depth compared to conventional round-body units, saving valuable machine footprint in tight assemblies. The bore is hard-anodized and paired with a two-way piston seal for reliable service.
This specific SKU features a male M18x1.5 threaded piston rod end for secure mechanical coupling to your load. It operates on PT1/4 ports and lacks a piston magnet, meaning it cannot directly host magnetic switches. End-of-stroke deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion.
| Model | AirTAC SDA50X85B 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).
Drives the side flaps on a continuous carton erecting machine, utilizing the 85 mm stroke and 981.7 N output to swiftly fold heavy corrugated cardboard without excessive axial depth.
Actuates a routing diverter on a packaging conveyor line, where the male M18x1.5 rod end securely mounts the gate linkage and handles the lateral routing force.
Functions as a compact ejection probe for small plastic injection molds, pushing finished parts clear of the cavity using roughly 60 kgf of force within a confined tooling envelope.
When sizing this unit, compare its 981.7 N push at 0.5 MPa against adjacent bores: stepping down to the SDA40 yields 628.3 N, while stepping up to the SDA63 provides 1558.6 N. Based on the 0.5 MPa figures, the safe working load is approximately 589 N (60% of capacity), translating to a vertical lift capability of about 50 kg with a 2:1 safety margin.
To finalize your order, confirm the 50 mm bore, 85 mm stroke, PT1/4 porting, and the male M18x1.5 rod thread (denoted by the B suffix). Note that a plain actuator will drift and cannot hold a load if air pressure drops or the valve is centered; the fixed bumper only decelerates near the stroke end and acts as neither a lock nor a brake. For suspended loads, specify an external rod lock or a pilot-operated check valve.
Quick checklist
This double-acting cylinder provides 981.7 N push and 824.7 N pull at 0.5 MPa, increasing to 1374.4 N push and 1154.5 N pull at 0.7 MPa. The theoretical maximum push is 200 kgf at 1.0 MPa. It operates between 0.15 and 1.0 MPa, with a proof pressure of 1.5 MPa, and supports speeds from 30 to 500 mm/s.
No, this specific SKU does not include a piston magnet, so it cannot host AirTAC reed or electronic switches. You would need the SDA50X85BS variant for sensing capabilities. Additionally, it uses a fixed NBR bumper to decelerate at stroke ends rather than an adjustable air cushion.
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