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54 —
®
BOLT PATTERN
With the Machinist Calc Pro 2, you can determine a Bolt
Pattern by entering the Bolt Circle Diameter, the Number of
Bolt Holes and the Angle of the first bolt hole (optional). You
can also enter an optional center x and y-coordinate of the
Bolt Pattern.
In addition to calculating the x and y-coordinates for each bolt
hole, the Bolt Pattern function also calculates the hole center-
to-center spacing (i.e. On-center distance from hole to hole).
Start
Angle
X
C
,Y
C
X
2
,Y
2
X
1
,Y
1
X
3
,Y
3
Bolt Pattern
Calculate the Bolt Pattern for a layout with a 3.5" Diameter,
a 20° Start Angle and 3 Bolts. The center x-coordinate is 10"
and the center y-coordinate is 15".
When determining angles, 0° is at the 3 o'clock position and
the rotation goes counterclockwise.
OO 0.
1. Enter the center x-coordinate:
10ia
ADJACENT
(x) 10. INCH
2. Enter the center y-coordinate:
15io
OPPOSITE
(y) 15. INCH
3844-UG4088E-E.indd 543844-UG4088E-E.indd 54 11/18/2022 6:50:14 AM11/18/2022 6:50:14 AM
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