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10Mar/15Off

Blunt Starts, Higbee Cuts, and Depth Notches

Thread Check can add many custom features to our thread gages such as depth notches, blunt starts, blunt points or chamfers that are
beneficial for several applications including thread depth gaging and short or shallow threads

Blind Hole – A hole that goes partially through a part.

 

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.

 

Chamfer – An angle ground on the front of a gage that allows for easier assembly with the mating part

 

Convolution – Removal of the incomplete thread back to the first full thread. Also
known as a “Blunt Start” or “Higbee Cut” per ASME B1.7 – 2006

 

Depth Notch – Measure from the centerline of the first full thread to the flat step of the notch.
A depth notch is only used on a go plug gage and is used to measure thread depth.

 

Grind Face w/in .5P - A convoluted thread plugs face is ground back to the base of
the first full thread. This permits the gage to inspect a blind hole to the bottom of the thread.

https://www.threadcheck.com/technical-documents/Custom-Threads-Terms-and-Definitions.pdf

Contact Thread Check Inc for more information

info@threadcheck.com

800 767 7633 or 631 231 1515

www.threadcheck.com

 

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