Looking for a reliable flexible coupling? This TB Wood’s Sure Flex flange coupling (part #8S178) is a workhorse. It’s got a 1-7/8” bore with a 1/2” wide x 1/4” deep keyway. Max RPM is 339. Designed to handle misalignment and absorb shock in drivetrain applications – think pumps, compressors, conveyors, and industrial machinery. The flexible element cushions vibrations and extends equipment life. Durable construction ensures it holds up under continuous use. Easy to install with standard tools. If you’re replacing an old coupling or setting up a new drive system, this one’s a trusted choice for smooth, reliable power transmission.
