Hello,
If anyone here in the forum is familiar with what is known as an (Higbee/Blunt Srart Thread).
I use this on a daily basis in lathe turning process to flatten the first thread(feathered sharp thread) of an acme thread both OD and ID.
the programs are pre written by our engineering department BUT! each time i set up a certain job i always have to re adjust the starting and or ending points of the higbee to get it just right without hitting the secound thread and scraping my first part.
I know this process has been used for years on fire hose couplings and so forth and it is described in serveral different issues of the machinist handbook but it does not describe a formula on how to calculate the begining and ending points to make a proper higbee.
so what i'm looking for is just how to calculate the starting and ending points of the higbee/blunt start thread points. If anyone is familiar with this it would be most appriciated.
Thank You
If anyone here in the forum is familiar with what is known as an (Higbee/Blunt Srart Thread).
I use this on a daily basis in lathe turning process to flatten the first thread(feathered sharp thread) of an acme thread both OD and ID.
the programs are pre written by our engineering department BUT! each time i set up a certain job i always have to re adjust the starting and or ending points of the higbee to get it just right without hitting the secound thread and scraping my first part.
I know this process has been used for years on fire hose couplings and so forth and it is described in serveral different issues of the machinist handbook but it does not describe a formula on how to calculate the begining and ending points to make a proper higbee.
so what i'm looking for is just how to calculate the starting and ending points of the higbee/blunt start thread points. If anyone is familiar with this it would be most appriciated.
Thank You