ATTACHMENT HUB, BACKUP PAD, AND ABRASIVE DISC

The present invention relates to an attachment hub for attachment to a sander, comprising a quick-release attachment assembly configured for releasable and aligned engagement with a counterpart of a backup pad particularly for an abrasive disc. Furthermore, the invention relates to a backup pad having a disc-like shape and comprising a first major surface and a second major surface, the first major surface configured for direct or indirect attachment of an abrasive disc, and the second major surface configured for facing towards an attachment hub for attachment to a sander, and a mounting portion for aligned engagement with an attachment hub of a sander. 本发明涉及一种用于附接到磨砂机的附接毂，该附接毂包括快速脱开附接组件，该快速脱开附接组件被构造为与特别用于研磨盘的支撑垫的配对件能脱开地且对准地接合。此外，本发明涉及一种支撑垫，该支撑垫具有盘状形状并且包括第一主表面和第二主表面，该第一主表面被构造用于直接或间接附接研磨盘，并且该第二主表面被构造为面朝用于附接到磨砂机的附接毂；以及安装部分，该安装部分用于与磨砂机的附接毂对准地接合。