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Have a question pertaining to the bidding process? If you need additional information about the equipment at this auction, contactīidSpotter Customer Service Support Department large quantity of inspection equipment.INSPECTION: Day prior to auction from 9:00 AM-4:00 PM Register 24 hours prior to start of auction. Cutter Diameter: The diameter of the theoretical circle formed by the cutting edges as the tool rotates.Auction starts at 9 AM local time. Shank Diameter: The width of the shank that is held in the toolholder. Overall Length: The total length of the tool between both axial ends. Length of Cut/Flute Length: The functional cutting depth with the tool in the axial orientation. Length Below Shank: Also called the reach, is the length from the necked portion to the end of the cutting end of the tool. Helix Angle: The angle measured from the centerline of the tool and a straight line tangent along the cutting edge.įlutes: The spiraled cutting grooves in the tool. Fewer flutes allow for larger chips and a deeper cut depth, but are weaker and best suited for plastics and aluminum. More flutes increase the tool strength but reduce the cutting depth for a smoother cut better suited for harder materials. Variable Helix: A variable helix endmill utilizes unequal flute spacing to reduce harmonics which can greatly extend tool life and improve part finish. Variable Pitch: Refers to cutting edge spacing that is unequal. On a standard 4-flute tool the cutting edges would be 90 degrees apart. By creating an endmill with unequal pitch some more some less than 90 degrees, the cutting forces are changed which results in reduced vibration, higher feed rates and better part finishes.įlutes are the cutting surface of the body of the tool.
It is a cavity that spirals along the axis of the tool body. A small number of flutes allow for more chip space allowing for faster material removal, but make the tool weaker. A higher number of flutes will increase the strength of the tool and are better suited for cutting harder materials. Single Flute: Used for high-speed machining of high-volume material removal often in plastics or CFRP. Two Flute: Used for high-volume removal in slotting and pocketing non-ferrous materials. Three Flute: The same space between flutes as the two-flute endmill, but are stronger. Used for ferrous and non-ferrous materials.įour Flute: Stronger than the three-flute endmill allowing for faster feed rates. They have less flute space than the 3-flute endmill and produce smaller chips. These are most often used when cutting ferrous materials.įive Flute: Have smaller flute spacing than four-flute endmills allowing for more strength than four-flute endmills. These are better suited for high-efficiency milling and hard materials. Six Flute and Above: These are finisher endmills that produce a very fine finish. They are also commonly used in dynamic or high-efficiency machining (HEM).Ĭoatings play a crucial part in the performance of your cutting tool, however, tool geometry is just as important to be successful.I have no idea what brand end mills you bought from Amazon, but I can tell you from my experience the American made ones have been far better than the Asian imports. Only 1 time did I intentionally buy some off shore tooling and it was a disaster.
I bought a box of 3/8" ball nose end mills for a special job. They bounced around like they were made out of rubber rather than do any cutting. I returned them and replaced them with Niagara brand. The Niagara ones worked as they should and the job was completed on time. I don't exclusively use Niagara, but I do try to stick to known brands, made in the USA whenever possible. There are close to 1,000 end mills in the cabinets. A quick look revealed the following brands: Union, Cleveland, Morse, Niagara, Nachi, FastCut, RapidKut, Putnam, Beloit Regal, National, DoAll, Acculead, Melin, TRW, Weldon, and Hanita. They are all good brands and there are undoubtedly others. I don't know which of these brands still exist, but I'm sure even if the companies are gone there is still some new tooling on the shelves. The most prolific brands seem to be FastCut, RapidKut, and Melin. That's most likely because they were the brands handled by our local supplier.
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