Original Assignee OSG Corp Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) ( en Inventor Hironori Yamamoto Takayuki Matsushita Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Active, expires Application number US12/933,834 Other versions US20110020087A1 įor more information about the benefits of Form Tapping or to inquire about buying it for your shop, contact us.- Google Patents US8425163B2 - Thread forming tapĭownload PDF Info Publication number US8425163B2 US8425163B2 US12/933,834 US93383408A US8425163B2 US 8425163 B2 US8425163 B2 US 8425163B2 US 93383408 A US93383408 A US 93383408A US 8425163 B2 US8425163 B2 US 8425163B2 Authority US United States Prior art keywords thread portion thread change gradient diameter Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Our preferred supplier partners that offer a comprehensive range of Form taps include Balax, Dormer, Emuge, North American Tool & Sandvik Coromant. This, combined with the newest coatings, guarantees a very long tool life in most applications. Tap designs have changed considerably in that time.
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