Drilling And Tapping Chart With Answer Key - Battlebots Iq Exercise
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3A BattleBots IQ Exercise
Drilling and Tapping
Directions: Use the two tables below to answer the following questions.
______1.
You need to drill and tap a hole for a 5/16” UNC coarse thread bolt.
What size tap drill will you select?
______2.
What is the diameter of the drill bit you selected?
______3.
How many threads per inch will it have?
______4.
What size tap drill is required for a ¼”, fine thread machine screw?
______5.
How many threads per inch will it have?
______6.
What is the diameter of the drill bit selected in question #4?
______7.
What is the diameter of a letter P tap drill?
______8.
Is a letter Z tap drill larger in diameter than ½”?
______9.
A 49/64 tap drill is required for which size bolt?
______10.
Which is larger, a No# 1 tap drill or an A sized tap drill?
Possible Answers:
# 18
#17
#20
#15
F
G
H
0.2570
0.2500
0.2610
18
20
16
0.2130
0.2090
0.2210
24
32
28
w
x
y
z
0.3230
0.3320
0.3160
Yes
No
¾-9
¾-10
7/8-14
7/8-9
No#1
A
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