Industrial Atra-Flex A0 HUB 19MM Inline Coupling

Industrial Atra-Flex A0 HUB 19MM Inline Coupling is a compact shaft coupling from the Atra-Flex A-Series designed to connect two shafts with a 19 mm bore in an inline arrangement. The A0 hub variant supports a maximum hub bore of 1.250 inches (31.75 mm), placing the 19 mm bore well within its range for smaller-drive applications. It uses Atra-Flex’s flex-hub architecture: each shaft receives a flex hub and, after proper alignment, a center insert is mounted around the hubs to engage with the insert’s lobes, creating a rigid, torque-transferring connection while accommodating minor shaft misalignment. This inline coupling is intended for industrial machinery and drives where precise alignment and reliable torque transmission are important, and its horsepower capacity varies with RPM according to the A-Series catalog’s look-up tables. The part is listed in official Atra-Flex catalogs as the A0 size and is part of a family of standard hub sizes (A0–A11) that provide scalable bore and torque options for modular coupling design, making it a versatile choice when upgrading or standardizing a drive train in constrained installation envelopes.