Retaining body for flexible grinding means, grinding system and grinding tool

A grinding system comprising:

• at least one retaining body for a flexible grinding structure that includes:
• a fastening layer with a fastening surface having a fastening structure configured to fasten a flexible grinding structure;
• and
• a support body with a support surface configured to support a retaining surface, wherein:
• the support body is air and dust permeable;
• the fastening layer is configured such that the fastening surface, in a direction running substantially perpendicular to the fastening surface, is substantially air and dust permeable;
• and
• the support body has a recessed surface that is recessed from the support surface, the recessed surface defining a dust chamber;
• the support body further includes a knobbed structurization that includes a plurality of supporting projections protruding from the recessed surface and which are separated from one another by at least one of ducts, channels and grooves configured to guide an air flow, the plurality of supporting projections including an outer surface that form at least a portion of the support surface;
• and
• at least one at least partially air and dust permeable grinding structure configured to be fastened to the fastening surface of the retaining body.

A retaining body for a grinding structure, comprising:

• a fastening layer with a fastening surface, having a fastening structure configured to fasten a flexible grinding structure;
• and
• a support body with a support surface configured to support a retaining surface, wherein:
• the support body is air and dust permeable;
• the fastening layer is configured such that the fastening surface, in a direction running substantially perpendicular to the fastening surface, is substantially air and dust permeable, so that an air flow can pass from the fastening surface, substantially perpendicular to the fastening surface, through the fastening layer,
• the support body has a dust chamber, that, from a perspective of the support surface, has a knobbed structurization, and is permeated by at least one of ducts, channels and grooves configured to guide an air flow, and
• the support body has at least one fresh air line, via which an air stream can be conducted into a region in front of the fastening layer of the retaining body.