US 12,472,564 B2
Core drill
Tomohiko Imae, Anjo (JP)
Assigned to MAKITA CORPORATION, Anjo (JP)
Filed by MAKITA CORPORATION, Anjo (JP)
Filed on Jun. 18, 2024, as Appl. No. 18/746,120.
Claims priority of application No. 2023-109190 (JP), filed on Jul. 3, 2023; application No. 2023-109203 (JP), filed on Jul. 3, 2023; and application No. 2023-109204 (JP), filed on Jul. 3, 2023.
Prior Publication US 2025/0010380 A1, Jan. 9, 2025
Int. Cl. B23B 45/02 (2006.01); B23B 45/00 (2006.01)
CPC B23B 45/008 (2013.01) [B23B 45/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A core drill comprising:
a motor comprising a stator and a rotor, which is rotatable relative to the stator;
a speed-reducing mechanism;
an output shaft that, in the state in which a core bit is mounted thereon, is rotated by the rotational force of the rotor transmitted via the speed-reducing mechanism; and
at least a first battery-mounting part, on which a first battery pack is mountable;
wherein:
a stator outer diameter, which is the outer diameter of a stator core of the stator, is 75 mm or more;
a stator length, which is the dimension of the stator core in an axial direction, is 30 mm or more; and
the core bit has a hole-drilling diameter, which is the outer diameter of a tip portion of the core bit, that is 155 mm or more.