Что такое чашечный токарный патрон (гладкий патрон)

Puzzle out what is and how to use the cup chucks for wood lathe (also known as smooth lathe chucks). This lathe chuck is designed primarily for turning in the centers the various parts that are difficult or almost impossible to clamp in the centers. Often for these crafts uses a various residues from production. Due to its design, the chuck has no protruding parts, it's safer in operation and is very effective. Cup chuck - https://rubankov.ru/id/patrony-gladki...