The AirTAC Airtac SC50 Standard Cylinder SC50X77S is a genuine double-acting standard air cylinder with a Ø50mm bore and 77mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
The SC50X77S is a double-acting pneumatic cylinder delivering 982 N of push force at 0.5 MPa (1767 N at 0.9 MPa). With a 50 mm bore and 77 mm stroke, it uses a 20 mm diameter piston rod with M16x1.5 threads, providing robust linear actuation for medium-duty tasks.
This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors on the barrel for contactless position sensing. The standard TPU seals offer reliable operation from -20 to +70 °C, and the adjustable air cushion at each end decelerates the piston smoothly within its 21 mm cushion length.
| Model | Airtac SC50 Standard Cylinder SC50X77S |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø50 mm |
| Stroke | 77 mm |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 21 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SC series datasheet. Operating pressure 0.15–1.0 MPa, proof pressure 1.5 MPa, temperature −20 to +70 °C. Confirm against the product label before installation. Thread options: PT (standard) / G.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (approx.) | 200 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
| SC | Standard tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×77 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related variants: SCD (double rod), SCJ (adjustable stroke), SCT (multi-position). Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
The 77 mm stroke and 982 N push force at 0.5 MPa are well-suited for diverting cartons or products on a conveyor line, with the built-in magnet enabling end-of-stroke confirmation via a CMSG sensor.
Provides consistent clamping force for medium-duty CNC fixtures or assembly jigs. The adjustable cushion prevents impact vibration that could disturb the workpiece during the 77 mm advance.
The -S magnet option makes this cylinder ideal for automated sequences requiring mid-stroke or end-stroke position feedback, such as a two-stage press or a sorting gate.
For applications needing slightly less force, stepping down to the 40 mm bore provides 628 N at 0.5 MPa, while moving up to the 63 mm bore increases force to 1559 N. The 77 mm stroke is a standard length for this bore, ensuring fast availability.
When replacing an existing cylinder, match these five points: 50 mm bore, 77 mm stroke, PT1/4 port thread, the built-in magnet for sensors, and the basic (no bracket) mounting style. This is a tie-rod cylinder, shorter than an ISO 15552 profile, so dimensional interchangeability is limited to other AirTAC SC50 tie-rod units.
Quick checklist
At the standard operating pressure of 0.5 MPa, the push force is 982 N and the pull force is 825 N. At the maximum operating pressure of 0.9 MPa, the push force increases to 1767 N. The theoretical maximum force at 1.0 MPa is 200 kgf.
Yes. The 'S' in the model code SC50X77S indicates a built-in magnet on the piston. This allows you to clamp compatible AirTAC CMSG (reed) or DMSG/EMSG (solid-state) sensors directly onto the barrel's sensor groove to detect piston position without additional brackets.
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