Clevite MS829H19 H-Series Tri-Metal Main Bearing Set Big Block Chevy .019 Undersize

The Clevite MS829H19 is an H-Series tri-metal crankshaft main bearing set designed for Big Block Chevrolet engines, featuring a .019-inch undersize specification to accommodate reground crankshafts. Engineered under the Clevite 77 banner — a name synonymous with high-performance engine building since 1948 — these bearings deliver the precision and durability demanded by both street performance and competition applications.

Clevite 77 H-Series Tri-Metal Construction:

• Three-layer design capable of carrying maximum loads of up to 12,000 PSI
• Outer electroplated Babbitt surface layer (.0005"–.0008" thick) reduces drag and wear
• Intermediate copper-lead alloy layer for load distribution and heat dissipation
• Precision hardened steel backing for structural rigidity and high crush retention
• Manufactured without flash plating for improved seating and break-in

H-Series Performance Design:

• Developed originally for NASCAR-level competition; suitable for all forms of racing and high-performance street use
• Medium level of eccentricity with a high crush factor for positive bearing retention
• Enlarged chamfers at the sides provide greater crankshaft fillet clearance — ideal for aftermarket performance crankshafts with larger fillet radii
• Optimized for engines operating in the medium-to-high RPM range
• Available with 180-degree (half-groove) oil groove configuration

Specifications:

• Part Number: MS829H19
• Series: H-Series (Clevite 77)
• Undersize: .019 in.
• Application: Big Block Chevrolet (BBC) — 366, 396, 402, 427, 454 cubic inch engines
• Groove: Half-groove (180°)

The Clevite MS829H19 is the go-to main bearing choice for engine builders working with reground Big Block Chevy crankshafts at the .019-inch undersize. Whether rebuilding a performance street engine or assembling a dedicated race motor, these bearings provide the proven reliability and precision tolerances that Clevite has delivered for decades.