![]() ![]() Thread forming taps can be very effective when used properly. I know nothing about #7, but the first six seem accurate, based on my experience - which is a few thousand holes. Use this chart from Kodiak Cutting Tools for reference with thread forming tap drill sizes. The ability to form their own leads makes Thredfloer Taps especially well suited for NC machines or other machines without lead screws. 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. Longer tap life, less tap breakage, and faster tapping speeds combine to assure high production rates and less machine downtime. 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. Note that the tap drill size differs from that used for a cutting tap and that an accurate hole size is required because a slightly undersized hole can break the tap. This design results in a solid, stronger tap.įorming taps last 3 to 20 times longer than cutting taps, because they have no cutting edge to dull. Thus thread forming is particularly suited to tapping blind holes, which are tougher to tap with a cutting tap due to the chip build-up in the hole. ![]() The absence of chips eliminates the need for flutes. Threads Per Inch: Minor Diameter 75 Thread for Aluminum, Brass & Plastics: 50 Thread for Steel, Stainless & Iron Close Fit: Free Fit 1: 0.073 48: 0.076 46: 0.081 2: 0.086 43: 0.089 41: 0.096 3: 0. Because no metal is cut away, the possibility of producing oversized threads is greatly reduced. Since the thread is formed and not cut, there are no chip-removal problems in blind holes.įor materials that work-harden, such as steel and stainless steel, the grain flow of formed threads follows the contour of the thread, resulting in greater thread strength.įorming taps rearrange the metal in the hole to create the thread. Polished REWO HSS Threading SPPT Taps, Size (mm): 2mm To 20 Mm 80 / Piece. Get Contact details & address of companies manufacturing and supplying Threading Tap. The Balax catalog notes these advantages: Find here Threading Tap, Thread Forming Tap exporters & OEM exporters India. I have no way to measure thread smoothness, but the formed threads appear to be many times smoother than a cut thread, under 10X magnification. The resulting thread is beautiful, even more so under magnification. It is important to use the drill size specified in their table. ![]() They state:īalax Thredfloer Forming Taps are ideal for applications involving aluminum, brass, copper, lead, stainless steel, carbon steel, cast steel, leaded steel and zinc. I use mostly Balax, as they're high quality & often available cheap on eBay. Every manufacturer of threadformers is giving incorrect information, and lots of us are using that information - with great success. ![]()
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