1. Holes In AutoCAD
Make a
Slam Dunk

2. COMMON HOLES IN MACHINED PARTS
COUNTERBORE
COUNTERSINK
DRILL/REAM

3. COUNTERBORE

4. COUNTERBORE - RIGHT & WRONG
ERROR
ON THE TOP VIEW - SHOW BOTH DIAMETERS AS SOLID CIRCLES
ON THE SIDE VIEW -
SHOW COUNTER BORE DEPTH - USE HIDDEN LINES

5. COUNTERSINK

6. COUNTERSINK - RIGHT & WRONG
ERROR
ON TOP VIEW-
SHOW BOTH DIAMETERS AS SOLID CIRCLES
ON SIDE VIEW-
SHOW ANGLE & DEPTH OF COUNTERSINK

7. DRILL/REAM

8. THRU-HOLE - RIGHT & WRONG
NOTE: USE CONTINUOUS LINETYPE IN TOP VIEW

9. BLIND DRILL -RIGHT & WRONG
NO-NO!
USE CONTINUOUS LINE TYPE ON TOP VIEW
SHOW THE DEPTH OF THE HOLE IN SIDE VIEW-
USE HIDDEN LINES

10. HOLE ANNOTATIONS ALWAYS USE HOLE DIAMETER - NEVER THE RADIUS!!!!
ALWAYS NOTE IF IT IS BLIND OR THRU!!!
ALWAYS NOTE DEPTH IF IT IS C’BORE OR BLIND
ALWAYS NOTE ANGLE IF IT IS C’SUNK

11. THRU-HOLE ANNOTATIONS
USE DIAMETER
USE ‘THRU’
NOTE LEADER ARROWHEAD IS ON OUTER EDGE OF CIRCLE
BOTH ACCEPTABLE!

12. BLIND HOLE ANNOTATIONS
TO MAKE THE DEPTH SYMBOL SHOWN IN THE THIRD VIEW, USE THE SYMBOL DROPDOWN IN
THE MTEXT DIALOG BOX.

13. COUNTERSINK ANNOTATIONS
FOR THRU - NOTE
DIAMETER OF THREAD, THRU
DIAMETER OF C’SINK
X ANGLE OF C’SINK
FOR BLIND - NOTE
DIAMETER OF THREAD,
DIAMETER OF C’SINK
X ANGLE OF C’SINK
DEPTH

14. COUNTERBORE ANNOTATIONS
FOR THRU - NOTE
DIAMETER THRU
DIAMETER C’BORE
DEPTH OF C’BORE
FOR BLIND - NOTE
DIAMETER X DEPTH
DIAMETER C’BORE
DEPTH OF C’BORE

15. REPETITIVE HOLES
A SPACE MUST BE USED BETWEEN THE
X & THE DIMENSION

16. REPETITIVE HOLES - PATTERNED
THE SPACING BETWEEN THE HOLES IS INDICATED AS 4X
THE SPACING MUST BE DETERMINED BY DIVIDING THE DISTANCE BY THE NUMBER OF SPACES BETWEEN THE HOLES

17. SUMMARY
THERE ARE THREE MAIN TYPES OF HOLES SHOWN IN FABRICATED PARTS -
DRILL
COUNTERSINK
COUNTERBORE

18. SUMMARY
HOLES ARE SHOWN IN A SYMBOLIC RATHER THAN ‘TRUE’ MANNER.

19. SUMMARY
HOLE NOTES FOLLOW AN ANSI STANDARD
FOLLOW THE RULES!!!!