front spindle design and logic
#1
11-19-2016, 01:12 PM
Join Date: Jul 2012
Location: Walnut Creek, California
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front spindle design and logic
LnrB and others have reported undue wear on the axle for the front hubs.
My son tests my grey matter from time to time on various subjects.
I bought up the spindle issue. He is "modernizing" Tom's Low T. Built almost
from scratch decades ago.
New front suspension almost from scratch. Older flame cut and ground portions replaced with CNC machine parts.
It is not only Jaguar that uses two piece "uprights". Why?
1. One piece would be too complex for production in rapid fashion.
2. Grain orientation of the forging would be inferior. Up and down
for the upright. Spindle at 90 degrees would have poor grain orientation.
Why does he inner portion where the inner race rides wear more than
elsewhere ?
1. We agreed that the inner race should NOT spin on the shaft. A firm fit is
optimum.
2. No good reason for steel on steel rotation. The bearings are there for a purpose.
3. Why the failures?
A. Poor maintenance. Rollers not free. Race turns, if less friction. Lube failure.
B. Poor adjustment. Tighten to seat the inner properly, then back off. Too loose and it can unseat just enough to spin. Steel on steel wears....
Carl
My son tests my grey matter from time to time on various subjects.
I bought up the spindle issue. He is "modernizing" Tom's Low T. Built almost
from scratch decades ago.
New front suspension almost from scratch. Older flame cut and ground portions replaced with CNC machine parts.
It is not only Jaguar that uses two piece "uprights". Why?
1. One piece would be too complex for production in rapid fashion.
2. Grain orientation of the forging would be inferior. Up and down
for the upright. Spindle at 90 degrees would have poor grain orientation.
Why does he inner portion where the inner race rides wear more than
elsewhere ?
1. We agreed that the inner race should NOT spin on the shaft. A firm fit is
optimum.
2. No good reason for steel on steel rotation. The bearings are there for a purpose.
3. Why the failures?
A. Poor maintenance. Rollers not free. Race turns, if less friction. Lube failure.
B. Poor adjustment. Tighten to seat the inner properly, then back off. Too loose and it can unseat just enough to spin. Steel on steel wears....
Carl
#2
11-19-2016, 01:22 PM
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Join Date: Mar 2008
Location: Pacific Northwest USA
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A. Poor maintenance. Rollers not free. Race turns, if less friction. Lube failure.
B. Poor adjustment. Tighten to seat the inner properly, then back off. Too loose and it can unseat just enough to spin. Steel on steel wears....
Carl
B. Poor adjustment. Tighten to seat the inner properly, then back off. Too loose and it can unseat just enough to spin. Steel on steel wears....
Carl
My non-researched and non-scientific opinion is that, the spindles/stub axles and bearings will last the life of the car....with good care. But, more often than not, front wheels bearings are neglected. The ritual of removing, cleaning, repacking, and readjusting bearings just isn't high on anyone's list, it seems.
Cheers
DD