What device is used to allow cable to make a 90-degree turn smoothly with low friction?

The quadrant block is specifically designed to facilitate smooth 90-degree turns in cables, reducing friction during the bending process. This device is particularly useful in systems where cables need to change direction without experiencing excessive wear or resistance, which can happen if the cable is forced to make a sharp turn. By employing a quadrant block, the cable can navigate the turn with minimal effort and strain, ensuring its integrity and performance over time.

Other devices listed do serve various functions but do not primarily focus on creating smooth, low-friction turns for cables. A pulling eye, for example, is typically used to connect and pull cables or ropes but does not aid in making turns. A pulley block could help redirect tension but may not specifically be optimized for smooth 90-degree turns. A cable guide can assist in directing cables, but it may not provide the same low-friction advantage during directional changes that a quadrant block offers.