Countersunk friction head diameter
Countersunk friction head diameter
(OP)
Dear experts,
For a countersunk bolt DIN7991 M6, what average friction head diameter should be taken into account for its calculation? Nothing appears to be stated in VDI 2230:2003 for countersunk bolts
I have found in http://www.hexagon.de/info112/index.htm that DKM = (Da+Di)/SQRT(2) for 90deg cone angle countersunk screws should be used. Any other references?
Thank you in advance
For a countersunk bolt DIN7991 M6, what average friction head diameter should be taken into account for its calculation? Nothing appears to be stated in VDI 2230:2003 for countersunk bolts
I have found in http://www.hexagon.de/info112/index.htm that DKM = (Da+Di)/SQRT(2) for 90deg cone angle countersunk screws should be used. Any other references?
Thank you in advance





RE: Countersunk friction head diameter
The friction under the head of a countersunk head is complex because of the yielding in the countersunk and the force vectoring the goes on. When we have had to figure this out, we used a Schatz unit to pull off the u'head friction.
RE: Countersunk friction head diameter
RE: Countersunk friction head diameter
I was able to find what I was looking for in the document written by Mr. Friedrich.