![]() |
|
|
|
Registered
Join Date: Dec 2001
Location: Cambridge, MA
Posts: 44,228
|
Math question
I need to get a ball bur to make a rivet set to fit these dome rivets. Head diameter is .324" and height is .067". Metric equivalents are 8.2mm and 1.7mm.
How do find the correct bur head diameter to make this shallow bowl? ![]()
__________________
Tru6 Restoration & Design |
||
![]() |
|
Registered
Join Date: Jan 2001
Location: Carlsbad,Ca.
Posts: 1,105
|
.452 Dia.
![]()
__________________
1981 911SC Targa-1966 912 -1989 Alfa Spider Graduate 1967 912-1985 Toyota FJ60 Landcrusier 1985 Toyota SR5 4x4-1965 Baja Bug-1997-4Runner-4x4 1966 Bug stock-2004 Toyota Rav4-1989 XJ6 Jag 1975 914, 1965 Norton N15CS 750, 1975 Husqvarna 360 CR GP 1982 Honda 500 XLS |
||
![]() |
|
Takin' hard left turns
Join Date: Dec 2004
Location: So Cal
Posts: 1,412
|
If I understand correctly, you need the equivalent spherical diameter.
![]() |
||
![]() |
|
Registered
Join Date: Dec 2001
Location: Cambridge, MA
Posts: 44,228
|
thanks! What is the math as I may have to do this for other rivets?
__________________
Tru6 Restoration & Design |
||
![]() |
|
Registered
Join Date: May 2002
Location: St Louis
Posts: 4,211
|
The radius of the head is 0.229350746 inches
__________________
Rick 88 Cab |
||
![]() |
|
Registered
Join Date: May 2002
Location: St Louis
Posts: 4,211
|
A google search for a circle from three points. I just put two points on the X axis and the other on the Y
__________________
Rick 88 Cab |
||
![]() |
|
![]() |
Unregistered
Join Date: Aug 2000
Location: a wretched hive of scum and villainy
Posts: 55,652
|
![]() |
||
![]() |
|