公开(公告)号：US20230400076A1

公开(公告)日：2023-12-14

申请号：US18252669

申请日：2021-11-17

Applicant: Sunstar Engineering Inc.

Inventor： Satoshi KUBOTA ,  Akihito OHATA

IPC: F16D65/12

CPC classification number: F16D65/125 ,  F16D2200/0021 ,  F16D2200/0013 ,  F16D2065/1328

Abstract: Provided is a brake disc having excellent cracking resistance. A brake disc 1 according to an aspect of the present invention comprises a plurality of drain recesses 3, each formed in an area against which a brake pad is abutted, wherein the angle of a shoulder portion 31 formed by a friction surface against which the brake pad is abutted and an inner peripheral surface of an opening of the drain recess 3 is an obtuse angle.