| 摘要 |
PURPOSE: A pitch honing stone is provided to elaborately grand the curved inside of an engine cylinder with threads. CONSTITUTION: A pitch honing stone comprises a pair of abrasive members(100). A pair of abrasive members is connected to a connecting member(30) at a regular interval. The abrasive member comprises a body(10) and a supporting plate(20). The body has a plurality of fixtures(12). A brush stone(13) is inserted and combined to the fixtures. The supporting plate is combined in the lower part of the body. |
