Utilize our free online Bolt Circle Calculator to quickly find the exact X and Y coordinates for bolt holes on a pitch circle diameter (PCD) or bolt circle diameter (BCD). Ideal for engineering, machining, and fabrication tasks, ensuring accuracy and saving valuable time for your projects.
Formula:
The Bolt Circle Calculator uses basic trigonometry to determine the X and Y coordinates for each bolt hole on a given bolt circle diameter (BCD).
Let R be the radius (BCD/2).
Let N be the number of bolts.
Let θstart be the starting angle (in degrees).
Let i be the current bolt index (from 0 to N-1).
The angle for each bolt hole (θi) is calculated as:
θi = (i * 360 / N) + θstart (in degrees)
Then, the X and Y coordinates are:
Xi = R * cos(radians(θi))
Yi = R * sin(radians(θi))