JEGS Performance Products 25256 - JEGS Rod Bearings

Performance Engine Bearings
Performance and High Performance are both constructed with two layers, a high strength steel backing plus a bonded layer of silicon, tin, and copper in an aluminum matrix that has a load capacity of 8,000 psi. It maintains it properties throughout its entire depth, delivering consistent and reliable performance, embedability, and conformability with no more than +0.00010 variation of thickness.

High Performance bearings are also micro-fine machined, have chamfered oil holes, and are narrowed for large radii cranks.

Features and Benefits:
Particle Embedability
More than half of engine bearing failures are caused by metallic particles which scratch crank journals and tear or weaken thin babbitt overlays such as in the tri-metal bearing. Since JEGS aluminum silicon bearing layer is much thicker than the babbitt overlay (0.015" vs. 0.0008"), it provides eighteen (18) times more embedability than a tri-metal bearing to catch and hold particles so they don't scratch the crank journals. This is especially true for particles over 0.0004" in diameter which cause most of the damage.

Conformability
The much thicker layer of aluminum silicon bearing material (0.015" vs. 0.0008") allows the bearing to conform to problems such as metal to metal contact when there is mis-alignment present or the connecting rods stretch. Greater conformability means fewer bearing failures.

Temperature Resistance
The aluminum silicon material's melting/fatigue point is over 450°F, 100° more than that of the thin babbitt overlay in a tri-metal bearing (350°F). This means added protection against localized overheating due to mis-alignment, detonation, overloading, loss of coolant, etc.

High Load Capacity
Aluminum silicon bearings successfully withstand the stresses of high performance engines. All JEGS Bearings are made from the same metallurgical alloy, so the regular bearing user gets the advantage of the alloy developed and used in race engines.

Control of Wall Tolerance
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. JEGS 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 bearings whose wall thickness at the crown can vary by up to +0.00025". JEGS engine bearings have no more than +0.00010" variation of the desired thickness.

All bearings are sold in sets.