Machinist Calc Pro Bolt Pattern Circle Layout How To Calculate

Now let me show you how the bolt circle pattern function works on the Machinist Calc Pro. It'll give you all your x, y coordinates for any size circle and any number of bolts, no matter where the origin point is. Let's start off with a 3 7/8" diameter circle and we're going to put 5 bolts on that. So the first press tells me the on center to on center (that's the chord length), is going to be 2.2777 inches from the center of each of those circles. Pressing it again gives me my x1 location, again will give me my y1 location and I can go all the way through pressing again and again and again and it gives me all my x,y coordinates all the way through number 5. Then it'll tell me again what the diameter of the circle was just to confirm it and what my centers were at the very center of the circle and if there was no angular rotation. Now if I want, I can rotate the start point, say 30 degrees, up from that 3 o'clock start point. So let me go [3][0] is my [Angle]. Now come up and hit the [Bolt Pattern] key - same 5 bolts, same chord length, but now you notice that the x and the y have each shifted. One other thing I can do is what if the origin point was not in the center, but way off to the side somewhere. So let's say my x was at 12 inches in and my y is 7 inches. Come back over here. There's 5 bolts, chord length is still the same, but now look at that x1 location - 13.67 - and the y and I can go all the way through all 5 locations and it'll again remind me of the 3 7/8 diameter circle and the x, y offsets there and the angular rotation. So that's basically the quick overview of the bolt pattern key. For more details you can download our user's guide at www.calculated.com/support.

Channel: Calculated Industries

Views: 60,560

Keywords: machinist calculator, feed and speed, speeds and feeds, milling speeds, drilling speeds, conversion calculator, thread tables, drill chart, taps drills, machinists, setters, tool, and, die, cutting tools, bolt, circle, pattern, fraction calculator, fraction to decimal, inches to mm, mm to inches, convert to mm, mm inches, inches mm, sine bar, right triangle, trigonometry, sheet metal fabricators, metal fabricators, steel fabricators, welders, tooling u, mc20, mc 20

Id: eY7BVRwFRS8

Length: 1min 52sec (112 seconds)

Published: Fri May 06 2011