Abstract: A core retaining device is provided for use with a core drill bit, which is adapted to cut a core from a material such as concrete. The core retaining device includes a core attachment mechanism for releasably connecting the core retaining device to the core. A bearing is connected to the core attachment mechanism and allows the drill bit to rotate while the core attachment mechanism remains statically connected to the core. A biasing arrangement operably connects between the drill bit and the core via the bearing, and axially biases the core away from the material preventing the core from slipping from the drill bit. The core retaining device further includes at least one auxiliary safety feature such as extensions which extend laterally outward from the drill bit.

Abstract: A core retaining device for use with a core drill bit, which is adapted to cut a core from a material such as concrete. The core retaining device includes a core attachment mechanism for releasably connecting the core retaining device to the core; a bearing connected to the core attachment mechanism allowing the drill bit to rotate while the core attachment mechanism remains statically connected to the core; and a biasing arrangement operably connecting between the drill bit and the core via the bearing, axially biasing the core away from the material preventing the core from slipping from the drill bit. The core retaining device further includes at least one auxiliary safety feature.

Abstract: A core retaining device for use with a core drill bit, the bit adapted for cutting a core from a material. The core retaining device comprises: a core attachment mechanism for releasably connecting the core retaining device to the core; a bearing connected to the core attachment mechanism allowing the drill bit to rotate while said core attachment mechanism remains statically connected to the core; and a biasing arrangement operably connecting between the drill bit and the core via the bearing, axially biasing the core away from the material preventing the core from slipping from the drill bit.