[DeTomaso] U-Joint Bolts
SOBill at aol.com
SOBill at aol.com
Sat Mar 20 02:26:14 EDT 2010
FWIW,
I know this has covered before, but.
When I removed my drive axles, I found two types of bolts. One type of
bolt was marked "SBE100" and the other type was marked "Rockford." The SBE100
are metric and the Rockford are 7/16-20.
The SBE100 bolt dimensions are:
Diameter of Threads = 11mm
Pitch of threads = 1.25mm
Bolt length under the head = 32mm
Thickness of head = 6.2mm
Thread length = 18mm
Grip length = 14mm
Diameter of grip area = 11.12mm
Distance across flats = 15.9mm
These bolts should be metric grade 10.9 150,000 psi tensile strength. The
bolts are not marked with the metric grade.
The Rockford bolts have a 17mm grip length (the area without threads)
which is too long for the u-joint flanges. I believe these are AN7-12A bolts
which have had the threaded area shortened.
I am replacing all my u-joint bolts with AN7-11A bolts and AN365-720A
locknuts from Aircraft Spruce.
The AN7-11A bolt dimensions are:
Diameter of Threads = 10.94mm
Pitch of threads = 1.27mm
Bolt length under the head = 31mm
Thickness of head = 6.42mm
Thread length = 17mm
Grip length = 14mm
Diameter of grip area = 11.05mm
Distance across flats = 15.76mm
Tensile Strength Rating = 150,000 psi
The AN7-11A bolts are essentially identical to the SBE100 within normal
manufacturing tolerances. The AN7-11A bolts are 0.07mm (0.0028 inches)
smaller in diameter than the SBE100 bolts. This difference is not a problem to me.
The AN7-11A bolts cost $1.25 each and the AN365-720A locknuts cost $0.86
each at Aircraft Spruce.
Have fun,
SOBill Taylor
sobill at aol.com
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