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Encyclopedia > End mill
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Several types of endmills
Several types of endmills

An endmill is a type of Milling cutter, a cutting tool used in industrial milling applications. It is distinguished from its cousin, the drill bit, in its application, geometry, and manufacture. The term "endmill" is sometimes considered to be machinist's slang, but has come into standard usage in industry publications, trade magazines, and manufacturers catalogues. Image File history File links Download high resolution version (1719x1014, 252 KB) (Photograph taken by Glenn McKechnie on the 26th March 2005. ... Image File history File links Download high resolution version (1719x1014, 252 KB) (Photograph taken by Glenn McKechnie on the 26th March 2005. ... Jump to: navigation, search Milling cutters are cutting tools used in milling machines or machining centres. ... Cutting is the separation of a physical object, or a portion of a physical object, into two portions, through the application of an acutely directed force. ... Jump to: navigation, search A Milling machine is a power-driven machine used for the complex shaping of metal (or possibly other materials) parts. ... Drill bits are the cutters of drill tools. ... Jump to: navigation, search Slang is the non-standard use of words in a language of a particular social group, and sometimes the creation of new words or importation of words from another language. ...

Contents


Types

A broad category of end and face milling tools exists, such as flat bottom, ball nose, radius, inverted radius, and chamfer tools. Each category may be further divided by application and special geometry. Jump to: navigation, search Milling cutters are cutting tools used in milling machines or machining centres. ...


It is becoming increasingly more common for traditional solid endmills to be replaced by more cost-effective inserted cutting tools (which, though more expensive, reduce tool-change times). A tipped tool or insert generally refers to any cutting tool where the cutting edge consists of a seperate piece of material, either brazed or clamped on to a seperate body. ...


Endmills are sold (unlike the majority of drills) in both imperial and metric shank and cutting diametres, depending on the country of origin. In the USA, metric is all but unheard of; in Canada, due to the country's proximity to the US, much the same is true; in Asia, however, metric diametres are standard. See: International System of Units, colloquially called the Metric System, and also metrication. ...


Applications

Endmills are used in milling applications such as profile milling, tracer milling, face milling, and the like. Depending on the material being milled, different tool types and geometry may be used. For instance, when milling a material like aluminum, it may be adventageous to use a tool with a very shallow flute depth, and a pre-dulled (but polished) cutting edge. Aluminum is a soft and lightweight metal with a dull silvery appearance, due to a thin layer of oxidation that forms quickly when it is exposed to air. ...


Raw Materials

Endmills have traditionally been made from high speed steel, but are now mostly made of tungsten carbide, a rigid and wear-resistant material, usually pressed from carbide powder into rods, which are then cut into blanks of industry-standard sizes. High speed steel (HSS) is a material usually used in the manufacture of machine tools. ... Tungsten carbide, WC or W2C, is a chemical compound containing tungsten and carbon similar to titanium carbide. ...


In the early 1990's, coatings to reduce wear and friction (among other things) began to come into wide use. Most of these coatings are referred to by their chemical composition, such as:

  • TiN (a basic yellowish coating that has fallen out of wide use)
  • TiCN (a popular blueish-grey coating)
  • TiAlN (an extremely popular dark purple coating).

Advances in endmill coatings are being made, however, with coatings such as Amorphous Diamond beginning to be seen at high-end shops (as of 2004).


Manufacture

Endmills are typically made on CNC (Computer Numeric Control) machines under high-pressure lubricants such as water, water-soluble oil, and high-flashpoint oil. Grinding inside the machine is accomplished with abrasive wheels mounted on a spindle (and in some cases, multiple spindles). Depending on what material is being ground, these wheels are made with industrial diamond (when grinding tungsten carbide), cubic boron nitrite (when grinding cobalt steet), and others material (when grinding, for instance, ceramics), set in a bond (sometimes copper). A CNC Turning Center The abbreviation CNC stands for Computer(ized) Numerical(ly) Control(led), and refers specifically to the computer control of machine tools for the purpose of (repeatedly) manufacturing complex parts in metal as well as other materials, using a program written in a notation conforming to the... Cutting fluid or coolant is liquid used to cool and lubricate the cutting edges of machine tools and the pieces they are shaping. ... A grinding wheel is an expendable wheel that carries an abrasive compound on its periphery. ...


External Links

Deboer Tool, Manufacturers of Cutting Tools; pictures and descriptions available.



WikiProject Metalworking:

Metalworking cutting tools: Image File history File links Blacksmith-hammer-anvil-50x50. ... Metalworking is the craft and practice of working with metals to create parts or structures. ...

Broach | Burr | Chisel | Counterbore | Countersink | Cutting tool | End mill | Metalwork file | File | Hand scraper | High speed steel | Milling cutter | Reamer | Stellite | Tipped tool | Tool bit Jump to: navigation, search A push style 5/16 keyway broach A broach is a series of chisel points mounted on one piece of steel. ... Jump to: navigation, search A selection of carbide burrs Burrs are small cutters used in die grinders, rotary tools or dentists drills. ... Steel woodworking chisel. ... Two types of counter bores A counter bore provides a square bottomed, recessed hole. ... Cross hole countersink Side and end view of a cross hole deburrer A cross hole deburrer is a cone-shaped tool with a cutting edge provided by a hole that goes through the side of the cone. ... A File (or Hand-File) is a metalworking hand tool used to shape material by abrasion. ... Detail of a double-cut flat file A file is a hand tool consisting of a steel shaft whose surface is cut with sharp parallel ridges made by a chisel before the file is hardened. ... Three different engineering hand scrapers A hand scraper is a single-edged tool used to scrape metal from a surface. ... High speed steel (HSS) is a material usually used in the manufacture of machine tools. ... Jump to: navigation, search Milling cutters are cutting tools used in milling machines or machining centres. ... A reamer is a tool for enlarging holes and is used in metalworking. ... Stellite was invented by Elwood Haynes in the early 1900s as a substitute for flatware that stained (or that had to be constantly cleaned). ... A tipped tool or insert generally refers to any cutting tool where the cutting edge consists of a seperate piece of material, either brazed or clamped on to a seperate body. ... A tool bit generally refers to a plain High Speed Steel (HSS) tool. ...


Metalworking topics:   Casting | CNC | Cutting machines | Cutting tools | Drilling and threading | Fabrication | Finishing | Grinding | Jewellery | Lathes | Machining | Machine tooling | Measuring | Metalworking | Hand tools | Metallurgy | Milling | Occupations | Press tools | Smithing | Terminology | Welding Casting is a process by which a material is introduced into a mold while it is liquid, allowed to solidify in the shape inside the mold, and then removed producing a fabricated object, part, or casing. ... A CNC Turning Center The abbreviation CNC stands for Computer(ized) Numerical(ly) Control(led), and refers specifically to the computer control of machine tools for the purpose of (repeatedly) manufacturing complex parts in metal as well as other materials, using a program written in a notation conforming to the... Drilling is the process of using a drill bit in a drill to produce holes. ... A typical steel fabrication shop Fabrication is an industrial term generally applied to the building of metal machines and structures. ... Rotating abrasive wheel on a bench grinder. ... Jump to: navigation, search Jewellery (Jewelry in American spelling); consists of ornamental devices worn by persons, typically made with gems and precious metals. ... Jump to: navigation, search This article is about a lathe as a tool. ... A lathe is a common tool used in machining. ... A machine tool is a powered mechanical device, typically used to fabricate metal components of machines by the selective removal of metal. ... Metalworking is the craft and practice of working with metals to create parts or structures. ... Jump to: navigation, search Metalworking hand tools are hand tools that are used in the metalworking field. ... Jump to: navigation, search Metallurgy is a domain of materials science and of materials engineering that studies the physical and chemical behavior of metallic elements and their mixtures, which are called alloys. ... Jump to: navigation, search A Milling machine is a power-driven machine used for the complex shaping of metal (or possibly other materials) parts. ... Jump to: navigation, search Power press with a fixed barrier guard A press, or a machine press is a tool used to work metal (typically steel) by changing its shape and internal structure. ... A smith or metalsmith is a person involved in the shaping of metal objects. ... Welding is a fabrication process that joins materials, usually metals or thermoplastics, by causing coalescence. ...


  Results from FactBites:
 
New Media Mill, LLC (276 words)
New Media Mill created a software encoding solution that allows show staff to drag and drop media files into an encoder which posts the media directly to the show's servers.
The broadcast background of New Media Mill's staff was a plus on this job, which required equal parts video engineering and encoding expertise.
When the Human Rights Campaign needed to webcast its presidential forum live to it's 500,000 members, New Media Mill assembled a fibre optic feed of the event and placed it on the same streaming network used by CNN and ABC News.
Sherline End Mill Holders (623 words)
FIGURE1--The flat area on a commercial double-ended end mill is for the set screw on the end mill holder to tighten against.
The advantage of this type of holder is that it allows you to use smaller size double ended mills or tools with longer shanks which could not be held in a milling collet.
If you want to use 3/8" (or other size) end mills, double ended cutters, or special cutters with the ease and accuracy of this system, you will find the cost of this part is money well spent in time saved.
  More results at FactBites »

 
 

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