Clevite MS-829H-1 H-Series Performance Main Bearing Set

The Clevite MS-829H-1 is an H-Series performance main bearing set designed for high-performance and competition engines. Developed primarily for NASCAR-type racing applications, these bearings deliver exceptional durability and performance across medium to high RPM ranges.

H-Series Design Features:

• Medium level of eccentricity for optimal bearing contact patterns covering 2/3 to 3/4 of bearing surface
• High crush design for maximum bearing retention in the housing
• Hardened steel back construction for added strength and fretting resistance
• Thin overlay design to prevent overlay fatigue and hen tracking
• Enlarged chamfers for greater crankshaft fillet clearance
• No flash plating on steel back for improved seating characteristics
• Standard 180-degree upper half grooving for optimal oil film development

Advanced Main Bearing Design:

This bearing set features a 180-degree groove in the upper main shell, which provides the best overall performance for connecting rod oil supply while maintaining maximum oil film thickness in the loaded lower bearing. The upper shells handle lower loads and retain the groove to supply connecting rods with oil, while the ungrooved lower shells develop a thicker oil film for improved safety margin and extended bearing life.

Applications:

H-Series bearings are ideal for engines with oversize crankshaft fillets operating in medium to high RPM ranges. They should be selected when P-Series contact patterns are too narrow or when a balanced approach to bearing eccentricity is required. If you're unsure which performance bearing series to choose, H-Series bearings are the recommended starting point.

Clevite 77 TriMetal Construction:

Features legendary three-layer bearing construction with a hardened steel back, copper-lead intermediate layer, and lead-tin-copper overlay for superior strength, durability, and wear resistance in demanding racing applications.