Hub, Quick-Flex coupling, QF500, Timken.

Quick-Flex elastomeric couplings are designed to withstand harsh conditions, yet need minimal maintenance. They're easy-to-install and require no lubrication. With a lifespan that can match that of your equipment. There's no metal-to-metal contact with Quick-Flex couplings, so you'll save money by avoiding damage to hubs or other metal components. The couplings withstand up to 2 degrees of misalignment, and they dampen vibration and shock loads in your equipment. When needed, you can replace the urethane insert quickly and easily without removing the hubs.