The AirTAC AirTAC SDA50X85BH 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 SDA50X85BH is a double-acting single-rod compact cylinder engineered with a 50 mm bore and an 85 mm stroke. It generates 981.7 N of push force and 824.7 N of pull force at 0.5 MPa. The riveted body assembly significantly reduces axial mounting depth compared to conventional round-body units, delivering a smaller machine footprint in tight spaces. This specific SKU includes an -H fluororubber (FKM) seal variant for enhanced thermal and oil resistance.
This model is configured with a male M18x1.5 piston rod thread (-B) for robust mechanical coupling to your load. The 50 mm bore dictates a PT1/4 air port. End-of-stroke deceleration is handled by a fixed NBR bumper rather than an adjustable cushion, meaning external shock absorbers should be added for high-energy cycles. Note that this base SKU lacks a piston magnet and therefore cannot support position sensing.
| Model | AirTAC SDA50X85BH 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 product push-off arm on a high-speed palletizing cell, utilizing the 981.7 N extend force to clear heavy cartons off the accumulation deck.
Raises and lowers a 50 kg vertical lift gate in a CNC machining center, where the compact riveted body minimizes Z-axis height intrusion.
Actuates a secondary ejector plate on a plastic injection molding machine, leveraging the FKM seals to withstand ambient radiant heat and synthetic fluid exposure.
When sizing this actuator, evaluate your force requirements carefully. Stepping down to an SDA40 yields 628.3 N of push at 0.5 MPa, while stepping up to an SDA63 provides 1558.6 N. The 50 mm bore here offers a computed safe working load of roughly 589 N (about 60% of the 0.5 MPa rating), translating to a vertical lift capacity of approximately 50 kg with a 2:1 safety margin. If your mechanism must maintain vertical position during air loss or valve centering, be aware this unit will drift; an external rod lock or pilot-operated check valve is required. Confirm your ordering essentials: 50 mm bore, 85 mm stroke, PT1/4 port, male M18x1.5 rod, FKM seals, and no sensor magnet.
Quick checklist
This 50 mm bore double-acting cylinder provides 981.7 N push and 824.7 N pull at 0.5 MPa, 1374.4 N push at 0.7 MPa, and a theoretical maximum push of 200 kgf at 1.0 MPa. Operating pressure ranges from 0.15 to 1.0 MPa, with a proof pressure of 1.5 MPa, and the piston speed range is 30-500 mm/s.
No, this specific SKU does not include a piston magnet, so it cannot support reed or electronic switches. You would need the -S option to enable sensing. Additionally, it uses a fixed NBR bumper for end-stop deceleration, not an adjustable air cushion, so external shock absorption is recommended for fast cycling.
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