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Callies Compstar Comet Lightweight 4340 Crankshaft, Chevrolet SB 350 Main
Features gun drilled mains, lightened rod journals, pendulum cut counterweights, and a star flange. All journals are polished to 5Ra or finer and match sized to within .0003 inch or less throughout the entire crankshaft. Designed to internally balance without the use of heavy metal. Triple heat treated and fully nitrided with a surface hardness of 61HRc or greater. All gray area edges are generously radiused to eliminate potential stress risers found on many lightweight cranks. All journals are precision ground with .125" Radii for strength. The result of this work are journals that have excellent load bearing surfaces and high fatigue limits. Average weight for 3.75" stroke is just 43 pounds. Requires narrowed bearings.
Part Type: Crankshaft
Application: Chevrolet Small Block | Small Journal
Crankshaft Material: 4340 Forged Steel
Nitrided: Yes
Rear Main Seal Style: 2 piece
Engine Main Bearing Type: 350 Main
Stroke: 3.750"
Rod Length: 6.000" and up
Rod Journal Diameter: 2.000"
Crankshaft Snout Size: Standard
Engine Balance: Internal
Lightening Holes In Rod Throws: Yes
Rod Bearings Included: No
Requires Narrow Bearings: Yes
Main Bearings Included: No
Manufacturer: Callies
Manufacturer's Part Number: SAJ143-CC
Weight: 43 lbs.
Warranty: Sold without warranty, expressed or implied
Quantity: Sold as Each
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