OVAL DRILLING GUIDE
For drilling an oval at angle
alpha back a distance Z you
must move the table a distance
X over and Y up.
OVAL
ANGLE
(ALPHA
DEGREES)
OVAL WIDTH (Z) (THOUSANDS, 0.001”)
15 30 45 60 75 90 105 120
X Y X Y X Y X Y X Y X Y X Y X Y
20
14 5 28
10 42 15 56 21
70 26 85
31 99 36 113 41
25
13.5 6.5 27 13 40.5 19.5 54 25 67.5 31.5 82 38 95.5 44.5 109 51
30
13 7.5 26 15 39 22.5 52 30
65 37.5 78 45 91 52.5 104 64
35
12.5 8.5 25 17 37.5 25.5 49 34 61.5 42.5 74 52 86.5 60.5 98 69
40
11.5 9.5 23 19 34.5 28.5 46 39 57.5 48.5 69 58 80.5 67.5 92 77
45
10.5 10.5 21 21 31.5 31.5 42 42 52.5 52.5 64 64 74.5 74.5 85 85
50
9.5 11.5 19 23 28.5 34.5 39 46 48.5 57.5 58 69 67.5 80.5 77 92
55
8.5 12.5 17 25 25.5 37.5 34 49 42.5 61.5 52 74 60.5 86.5 69 98
60
7.5 13 15 26 22.5
39 30 52 37.5
65 45 78 52.5 91 64 104
65
6.5 13.5 13 27 19.5 40.5 25 54 31.5 67.5 38 82 44.5 95.5 51 109
70
5 14 10 28 15 42 21 56
26 70 31 85 36 99 41 113
REV A 12-2-05 18
