king bearings
king bearings
Author :Admin | Publish Date:2013-03-12 16:09:42
Alecular bearings successfully withstand the stresses of blown,
nitro-methane burning Top Fuel dragsters generating 5,000 hp at 8,000 rpm and in
700 hp circle track engines running for extended periods of time. The same
metallurgical alloy is used in [King bearings] that is used in King’s High Performance
bearings, so the regular bearing user gets the advantage of the alloy developed
and used in race engines.
The Alecular material’s melting/fatigue point is over 11000 F, almost three
times that of the thin babbitt overlay in a tri-metal bearing (400OF). This
means added protection against localized overheating due to mis-alignment,
detonation, overloading, loss of coolant, etc.
Bearing -to- journal clearances on main and connecting rod bearings can be affected by several variables, all of which
the engine builder must try to control. King has removed concerns about
inconsistent shell to shell bearing wall thickness by the use of statistical
control methods to keep wall thickness to very limited variation.
Other manufacturers produce skf bearings
whose wall thickness at the crown can vary by up to + .00025". King bearings are
produced using "Bull's Eye" specs which set a higher standard of controlling the
wall thickness, permitting no more than + .00010" variation of the desired
thickness.
The benefits of tight control of wall thickness tolerance are:
1. Improved
consistency of bearing to journal clearance. No more trying different bearings
within a set to get the "right" fit. Superior eccentricity and crush relief
values for a better oil "wedge" and less journal wear. Less taper across the
bearing face, meaning superior wall stability, a more parallel wall and better
oil film development.
2. Crankshaft
grinder does not need to grind cranks "fat" or "thin" to compensate for koyo bearing variations.
D801023 AB
D801437
DAC3870W-3
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