Skip to main content
1-Visitor
August 24, 2014
Solved

How to calculate the depth of hole thread if it is bind hole ?

Hi

Pls find th eimage

How to calculate the depth of hole thread if it is bind hole ?

Details ;

M10x1.5, 40 length , thread length 26 mm

Over all assemble length 40 mm

    17-Peridot
    August 25, 2014

    3.75 is 2.5 * 1.5mm and the 1mm is for good measure (actually, it is part of the formula posted above)

    Please remember that you have to consider the type of thread tapping method you are using. 2.5 * pitch is for roll formed threads.

    15 replies

    1-Visitor
    August 24, 2014

    Haris,

    according to me go on Right tool chest where you got Hole option go through this, Now this will open sub option it contain shape option where you able to see and provide standard dimension as sown in capture PNG image

    Translate
    17-Peridot
    August 24, 2014

    It depends on what type of tap is being used. First of all you need a counterbore or pre-drill for the unthreaded part of that particular screw. This requires a separate feature created before the threaded hole so the cosmetic thread has a good start surface.

    This is a pretty nice guide for the pilot drill depth courtesy of:

    http://tapmatic.com/images/pdf/Drill%20Depth%20Clearance.pdf

    tap_clearance_ref.PNG

    Translate
    1-Visitor
    August 25, 2014

    Anotinous in above diagram the value you took 0.05 what is that value and 1/4-20 standard what it represents. Please tell us to know more about

    Translate
    2-Explorer
    August 25, 2014

    In English measurement threads have two numbers to describe them:

    1) The nominal diameter

    2) The number of thread turns in each inch

    1/4 = .250 inch

    20 = 20 turns to advance the thread one inch. The pitch is 1/20 inch per turn = .05 inch

    Metric thread usually use (you know this, for comparison)

    1) Nominal diameter

    2) thread pitch

    Translate