Apparatus for delivering liquid coolant to cutting tools

Abstract From the Canadian patent

A roadway milling machine includes a hollow cylindrically walled, shaft mounted imperforate drum having tungsten carbide tipped steel cutting tools supported in tool holders extending generally radially outwardly from the cylindrical surface of the drum. The drum is moved over a roadway to be milled and is rotated on its shaft to bring the cutting tools into operative contact with the roadway. Water is fed into the drum along a water access opening provided along the axis of the drum shaft. The water flows through openings provided in the cylindrical drum wall toward each cutting tool. The water impinges upon and cools the cutting tools. In order to limit the flow of water from the drum to …