Cutting tool ( machining ) - wikipedia Cutting tool ( machining ) This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. ( February 2010 ) In the context of machining, a cutting tool or cutter is any tool that is used to remove material from the work piece by means of shear deformation. Cutting may be accomplished by single - point or multipoint tools. Single - point tools are used in turning, shaping, planing and similar operations, and remove material by means of one cutting edge. Milling and drilling tools are often multipoint tools. Grinding tools are also multipoint tools. Each grain of abrasive functions as a microscopic single - point cutting edge ( although of high negative rake angle ), and shears a tiny chip. Cutting tool materials must be harder than the material which is to be cut, and the tool must be able to withstand the heat generated in the metal - cutting process. Also, the tool must have a specific geometry, with clearance angles designed so that the cutting edge can contact the workpiece without the rest of the tool dragging on the workpiece surface. The angle of the cutting face is also important, as is the flute width, number of flutes or teeth, and margin size. In order to have a long working life, all of the above must be optimized, plus the speeds and feeds at which the tool is run. Contents 1 Types 1.1 Cutting tools with inserts ( indexable tools ) 1.2 Solid cutting tools 1.3 Holder 1.4 Tool setup 2 Cutting edge 3 References Types Linear cutting tools include tool bits ( single - point cutting tools ) and broaches. Rotary cutting tools include drill bits, countersinks and counterbores, taps and dies, milling cutters, reamers, and cold saw blades. Other cutting tools, such as bandsaw blades, hacksaw blades, and fly cutters, combine aspects of linear and rotary motion Cutting tools with inserts ( indexable tools ) Cutting tools are often designed with inserts or replaceable tips ( tipped tools ). In these, the cutting edge consists of a separate piece of material, either brazed, welded or clamped on to the tool body. Common materials for tips include cemented carbide, polycrystalline diamond, and cubic boron nitride. Tools using inserts include milling cutters ( endmills, fly cutters ), tool bits, and saw blades. Solid cutting tools The typical tool for milling and drilling has no changeable insert. The cutting edge and the shank is one unit and built of the same material. Small tools can not be designed with exchangeable insert Holder To use a cutting tool within a CNC machine there is a basic holder required to mount it on the machine 's spindle or turret. For CNC milling machines, there are two types of holder. There are shank taper ( SK ) and hollow shank taper ( HSK ). Tool setup The detailed instruction how to combine the tool assembly out of basic holder, tool and insert can be stored in a tool management solution. Cutting edge The cutting edge of a cutting tool is a very important for the performance of the cutting process. The main features of the cutting edge are : form of the cutting edge : radius or waterfall or trumpete cutting edge angles ( free angle and rake angle ) form and size of the chamfers The measurement of the cutting edge is performed using a tactile instrument or an instrument using focus variation. To quantify a cutting edge the following parameters are used : cutting edge radius for symmetric edges cutting edge ellipse axis for asymmetric edges. factor K, this is the releation between Sγ and Sα. This can also be calculated by the ratio of the two axis of the ellipse. This factor describes the form of the cutting edge. 3 angles : clearance angle, wedge angle, rake ( chipping ) angle Δr length and orientation of the bevel cutting edge profile with parameters One of the most important cutting edge parameters is the K factor. It specify the form of the cutting edge. 1 means a symmetric cutting edge. If the value is smaller the form is called a waterfall. If the value is larger than 1 it is called a trompete. Depending on the cutting material, feed rate and other influence factors a cutting tool with the optimum K factor should be used. References Jump up ^ Stephenson, David A. ; Agapiou, John S. ( 1997 ), Metal cutting theory and practice, Marcel Dekker, p. 164, ISBN 978 - 0 - 8247 - 9579 - 5. Cutting and abrasive tools Abrasive saw Axe Blade Bandsaw Bolt cutter Broach Ceramic tile cutter Chainsaw Circular saw Chisel Coping saw Countersink Cutting tool Diagonal pliers Diamond blade Diamond tool Drawknife Drill bit Emery cloth File Fretsaw Froe Glass cutter Grater Grinding wheel Hacksaw Hand saw Hole saw Incisor Knife Laser Lawn mower Machete Meat slicer Mezzaluna Milling cutter Miter saw Nail clipper Nibbler Pencil sharpener Pipecutter Pizza cutter Plasma cutter Plane Pocket knife Rasp Razor Reamer Sandpaper Saw Scalpel Scissors Snips Steel wool Surform Switchblade Tool bit Utility knife Water jet cutter Wire brush Wire stripper Types of tools Cleaning Cutting and abrasive Forestry Garden Hand Machine and metalworking Measuring and alignment Power NDL : 00570833 Retrieved from `` https://en.wikipedia.org/w/index.php?title=Cutting_tool_(machining)&oldid=805674770 '' Categories : Machining Metalworking cutting tools Hidden categories : Articles needing additional references from February 2010 All articles needing additional references Talk Contents About Wikipedia Català Deutsch Español فارسی 한국어 Hrvatski Қазақша 日本 語 Polski Русский Srpskohrvatski / српскохрватски Українська Edit links This page was last edited on 16 October 2017, at 22 : 26. 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Question: what is the material of cutting tool used in lathe machine
Answer: must be harder than the material which is to be cut