Dimensioning counterbores

A drilling machine is used for this operation, and a typical counterboring tool is shown in Fig. 14.26. The operation involves enlarging existing holes, and the depth of the enlarged hole is controlled by a stop on the drilling machine. The location of the counterbored hole is assisted by a pilot at the tip of the tool which is a clearance fit in the previously drilled hole. A typical use for a counterbored hole is to provide a recess for the head of a screw, as shown in Fig. 14.27 or a flat surface for an exposed nut or bolt, as in Fig. 14.28. The flat surface in Fig. 14.28 could also be obtained by spotfacing.

Figure 14.29 shows methods of dimensioning counterbores. Note that, in every case, it is necessary to specify the size of counterbore required. It is not sufficient to state 'COUNTERBORE FOR M10 RD HD SCREW', since obviously the head of the screw will fit into any counterbore which is larger than the head.

Engineer Drawing Counterbore ExampleEngineering Drawing Counterbore

Was this article helpful?

+1 -2
Pencil Drawing Beginners Guide

Pencil Drawing Beginners Guide

Easy Step-By-Step Lessons How Would You Like To Teach Yourself Some Of The Powerful Basic Techniques Of Pencil Drawing With Our Step-by-Step Tutorial. Learn the ABC of Pencil Drawing From the Experts.

Get My Free Ebook


Responses

  • makda
    How to show screw in engineering drawings?
    8 years ago
  • Flavus
    How to show counterbore dimensions in drawings?
    8 years ago
  • afwerki neftalem
    How to draw a counterbore?
    8 years ago
  • lawrence
    How can i put on drawing counterbore?
    8 years ago
  • CALVIN
    How to draw a counterbore tecnical drawing?
    4 years ago
  • Pamela
    How to draw humanbeing with dimensioning it?
    4 years ago
  • birgit
    How to draw counterbore holes in technical drawing?
    3 years ago
  • andreas
    How to draw m10 dimension in engineering drawing?
    3 years ago
  • michelle
    What pencil is used to drawing and dimensioning?
    3 years ago
  • alarico
    How to show counterbore on drawing?
    3 years ago
  • ross
    How is a sketch of a counter bore?
    2 years ago
  • tewelde
    How to section counter bores in technical drawing?
    2 years ago
  • david
    How to dimension a counterbore in drawing?
    2 years ago
  • zula
    How to show countersunk hole on drawing?
    2 years ago
  • jasmin
    How to dimension couterbore?
    2 years ago
  • costantino arcuri
    Who to show counter hole in drawing?
    2 years ago
  • bradley
    How to represent counterbore in drawing?
    1 year ago
  • ruaraidh
    How to dimension a countersink hole engineering drawing?
    1 year ago
  • Maik Maurer
    How to read counterbore hole drawing?
    1 year ago
  • ruari
    How to represent counter sink in engineering drawing?
    1 year ago
  • Senait
    How to show counterbore in catia drawing?
    12 months ago
  • karri
    How to draw engineering drawing countersink?
    11 months ago
  • Thomas
    How to dimension countersink v counterbore?
    11 months ago
  • Senay
    What information is required for a counterbore sketch?
    11 months ago
  • anthony
    How to show many holes in a technical drawing?
    11 months ago
  • ren rothschild
    How to label counterbore in engineering drawing?
    10 months ago
  • mandy
    How to represent the counter bore and the hole together?
    10 months ago
  • eustorgio
    HOW TO SPECIFY A COUNTER BORE IN A MECHANICAL DRAWING?
    10 months ago
  • dominic
    How to read counterbore dimension?
    9 months ago
  • Jaakko
    How show counter bore in drawing?
    9 months ago
  • antonio
    HOW TO DIMENSION COUNTER BORE?
    9 months ago
  • teija
    How to label a hole on technical drawing?
    9 months ago
  • calliope pirozzi
    How to dimension holes counterbore?
    9 months ago
  • salvia twofoot
    HOW TO DIMENSION A COUNTERBORE AND COUNTERSINK HOLE?
    9 months ago
  • yasmin
    How to read counterbore dimensions?
    8 months ago
  • INIGO
    How to show countersank holes on shop dwgs?
    8 months ago
  • juha rajam
    How to drawn countersunk hole?
    8 months ago
  • winta
    How to dimension threaded holes in engineering drawings?
    8 months ago
  • Elijah
    How to label counterbored hle on drawing?
    8 months ago
  • romano
    How to write hole dimensions technical drawing?
    8 months ago
  • lucrezia
    What is the hole depth symbol engineering?
    7 months ago
  • Rory
    How to dimension counterbore in engineering drawing?
    7 months ago
  • andreas
    How do dimentoin a counter Bore?
    7 months ago
  • kaj
    HOW TO DETAILING THE COUNTER BORE HOLE BY GEOMETRIC DIMENSION?
    7 months ago
  • Kristian
    How to display a counter bore on a drawing?
    7 months ago
  • marko tompuri
    What is the pilot depth of a 3/8 counterbore tool?
    7 months ago
  • ROBUR GOLDWORTHY
    How to measure counterbore depth in drawing?
    6 months ago
  • robert
    How to dimension counter bore holes?
    6 months ago
  • Ireneo Boni
    How is counter bore shown in drawing?
    5 months ago
  • annukka
    How to label a counterbore in solidworks?
    5 months ago
  • jessika
    How to read counterbore measurements?
    5 months ago
  • piia-noora
    How to dimension a counterbore in solidworks?
    4 months ago
  • kristiina
    How to dimension a couterbore hole?
    4 months ago
  • rufino
    How to dimension counterbore holes in catia?
    4 months ago
  • rudigar
    How to dimension counter bores?
    4 months ago
  • donald spangler
    How to dimensions counterbore holes on drawings?
    4 months ago
  • prima took-took
    How to demension counterbore on solidworks drawing?
    3 months ago
  • immacolata
    What is the depth of the counter bore for three counter bore holes (format: 0.xx)?
    3 months ago
  • Pablo
    How to dimension a thread depth in a counter bore?
    3 months ago
  • felix fuchs
    How to write counterbore?
    2 months ago
  • FETHAWI
    HOW TO DIMENSION COUNTERBORED HOLES?
    2 months ago
  • Rowan
    How to interpret counterbore on drawings?
    2 months ago
  • jessika
    HOW TO CALLOUT A COUNTERBORE ON A DRAWING?
    1 month ago
  • ruaridh
    How to dimension threads in a counterbore?
    1 month ago
  • Paul
    How to call out counterbored holes in engineering drawing?
    1 month ago
  • primrose underhill
    How can i show drilling in a hole in engineering drawing?
    1 month ago
  • hana
    How do you show a counterbore on an engineering drawing?
    1 month ago
  • Petra
    How to denote counterbore on drawing?
    1 month ago
  • myrtle goodchild
    How draw a counterbore hole?
    28 days ago
  • brenda
    How to call out counterbores?
    10 days ago
  • Leland Campbell
    How to write a counterbore hole dimension?
    2 days ago

Post a comment