The forming tap, running at the same surface speed, spindle speed of 307 rpm, and feed of 460 mm/min, produced 6240 threads at a cost per hole of $0.01.įorming taps work with standard tapping heads, CNC machines, automatic screw machines, or leadscrew tappers. The cutting tap could produce an estimated 2281 threads at surface speed of 10 m/min, spindle speed of 322 rpm, and feed of 483 mm/min for a cost per hole of $0.02. In one example, the software was used to compare cost of producing a 15 mm deep, M10 thread in B226 aluminum casting alloy. By inputting the work material, thread parameters such as size and tolerances, the type of machine being used, and hole type, users can get a direct economic comparison between thread forming and cutting. Cost per threaded hole can be further reduced by a reduction in downtime normally created by chip problems, tap breakage, and frequent tool replacement.Įmuge offers a computer model service that compares expected performance of forming taps versus thread cutting. The result of higher speeds and longer tool life is higher production rates and lower costs.
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