A Bearing Scraper is not normally used to dig out deep pockets of babbit or soft metals of an engine bearing. A Bearing Scraper is more effective when used to lightly scratch thin even areas of an engine bearing that have been identified as 'high spots' after a test fitting and test rotation of a camshaft once the camshaft bearings have been changed. In extreme cases a Bearing Scraper can be used to scrape the bearings of Crankshaft Main Journals or Rod Journals, but care needs to be used to limit the amount of material removed from any crankshaft bearing surfaces because the crankshaft spins at double the RPMs of a camshaft.