How to measure countersink angles of countersunk holes in sheet …
Jun 27, 2006 · The use of the hight differance between ball of known sizes works well for angle actuals. An additional option is to cast the countersink and use an optical comparitator to measure the replication. Inspection of this feature on an on going basis should be concentrated on the set up. The countersink angle changes as the cutter wears.
Equation to find countersink angle | Free Math Help Forum
Nov 9, 2017 · While researching this problem in a machining forum, some one said I you have those 3 things "you can use trig to sort it out". It was an old post and my response asking for more information went un-answered. If it is indeed possible to get the angle using math, I would like to make a form in Excel for an operator to verify the angle of ...
How to measure countersink angles of countersunk holes in sheet …
Jun 27, 2006 · This tool is designed to produce a specific countersink size at a specific angle. A 100 degree countersink tool can not produce a 98 degree to a 102 degree countersink, in other words, the angle is fixed and can not be adjusted. The variables are the thru hole and the countersink size.
Countersunk Holes and Implied 90 3 - Eng-Tips
Jun 12, 2003 · Section 1.8.12 of Y14.5-2009 indicates that for countersunk holes "...the diameter and included angle of the countersink are specified.". In the corresponding figure 1-39 the countersink feature is shown dimensioned with a 90° angle. Why is an angle dimension required when the included angle...
Countersink Angles - Mechanical engineering general discussion
Mar 22, 2019 · There are a total of 8 screws (alloy steel), 2 on each quadrant 45° angle around two concentric parts (anodized aluminum). The surface that the countersink sits in is not flat but rather multiple angles approximating a cylindrical surface. The head of the FHCS sits below all exposed surfaces.
Countrsink lead-in for internal threads--is there a std?
Oct 17, 2005 · I'm looking for a standard or information regarding the countersink on an internal thread. I have an engineer who insists on specifying a countersink on all internal threads. I have contended that it is standard machine shop practice to put a 90° csk as a lead-in (he always specifies 120°) a little larger than the major dia. "Prove it!" he said.
Dimensioning Counterbores & Countersinks - Eng-Tips
May 1, 2001 · I have to indicate the thru hole diameter, then the countersink diameter and angle. This is time consuming to say the least. The problem with this is that only 1 dimension will update if the part changes. In my case, it's the countersink diameter. A work around for this is to dimension the thru hole and then dimension the countersink diameter.
Positional tolerancing of "pure" countersinks 1 - Eng …
Mar 28, 2002 · The callout shown above controls the outside diameter of the countersink and the total included angle (side to side). A positional tolerance could control both the x-y location of the hole as well as the perpendicularity of the centerline, depending on the choice of datums.
Gage to inspect position of countersink relative to thru hole? 3
May 7, 2013 · A countersink is not a feature of size so using position to control their location is out of the question. illini8181, There are more things to consider besides the location of the countersink to the thru hole. In fact, that relationship is non-functional. What you care about is the relationship of the countersink to the threaded hole.
shear loads on countersunk screws - Eng-Tips
Jun 25, 2002 · My comments are general. I believe that the effect of the countersink angle is secondary for the screw stress. The loads generated on the screw itself are still basically the same bending loads as with a screw that is not counter sunk if both are pretorqued and not loose in their attachment. there may be marginal additional tension loads and bending on the screw …