Sep 4, 2013 · “Blunt start” (“blunt end”) designates the removal of the incomplete thread at the end of the thread. This is a feature of threaded parts that are repeatedly assembled by hand, such as hose couplings and thread plug gages, to prevent cutting of hands and crossing of threads, and which was formerly known as a Higbee cut.

Dec 9, 2010 · The engineers didnt typically call out the angle going from thread OD to thread relief. The manual guys would cut it square, then thread. The problem was that it left a thin feathered weak thread at the end that was easily bent over.

Aug 24, 2008 · In the case of an Acme or Stub Acme you can usually just use the threading tool to blunt the start of the thread on a CNC lathe. You can calculate based on your start point in "Z" where your first full thread will be.

Feb 20, 2024 · The Higbee is an adaptation to your current thread, designed to allow for smoother threading without the risk of cross threading. It's alternatively known as "Quick Start Threads" or "Blunt Start Threads". A proper Higbee looks like this: Not how the …

Jan 22, 2009 · "Mill or cut back thread ends to the FIRST FULL CROSS SECTION of thread (i.e. Higbee Cut). The removed portion of the thread MUST be milled down FLUSH or slightly below flush to the thread root, or surrounding base metal."

Mar 20, 2012 · Blunt start thread: a thread with removal of the incomplete thread at the starting end. This is a feature of the threaded parts that are repeatedly assembled by hand, such as hose couplings and thread gages, to prevent cutting of hands and crossing of threads.

Nov 25, 2008 · Cut the thread as you normally do and then recut it with a 'cut grip' or some sort of square tool untill the first thread is cut off and is blunt. make sure the rapid is set at 100% so the 'ramp' is steep. You can adjust the z start to line up the edge of …

Dec 30, 2023 · Higbee threads, also known as blunt-start threads, offer a unique approach to thread cutting in CNC machining. These threads provide a full thread form at the very start, eliminating the need for additional deburring and ensuring a safe and strong thread connection.

Jun 15, 2011 · We use a grooving tool after the thread cycle, internal or external. Not a 'true' hygbie in the 45 degree fashion, but it smooths out the starting thread well. I start the groover at about 1/2 thread pitch off from the threading tool.

Mar 10, 2015 · Blunt Point –The removal of a male center point from threads smaller than #6 (M4). This does not allow the gage to be face ground to within .5P. This is not a Blunt Start. See Convolution below.