A tool bit is a non-rotary cutting tool used in metal lathes, shapers, and planers. Such cutters are also often referred to by the set-phrase name of single-point cutting tool, as distinguished from other cutting tools such as a saw or water jet cutter.
The lathe is a machine tool used principally for shaping pieces of metal (and sometimes wood or other materials) by causing the workpiece to be held and rotated by the lathe while a tool bit is advanced into the work causing the cutting action.
Milling cutters are cutting tools typically used in milling machines or machining centres to perform milling operations (and occasionally in other machine tools). They remove material by their movement within the machine (e.g., a ball nose mill) or directly from the cutter's shape (e.g., a form tool such as a hobbing cutter).
7-2 TOOLS AND EQUIPMENT GENERAL PURPOSE CUTTING TOOLS . The lathe cutting tool or tool bit must be made of the correct material and ground to the correct angles to machine a workpiece efficiently. The most common tool bit is the general all-purpose bit made of high-speed steel.
Feb 02, 2018 · Milling cutters are designed to cut with CW spindle, except LH tapping. As regards lathe tools, RH and LH designation has nothing to do with spindle direction or direction of feed, because the same tool can be placed in both normal and inverted positions on the same machine, which reverses the directions.