🔍 Key Concepts

• Shape and purpose of different chisel tips • How oil grooves are formed in bearings or metal surfaces • Difference between chisels used for cutting channels versus squaring corners

💭 Think About

• Visualize the cross-section of an oil groove. Is it sharper and square, or more curved and smooth? • Which chisel tip would naturally create a narrow, controlled groove rather than a wide flat cut? • Think about which chisel is better for starting and following a line in metal without digging sharp corners that could cause stress points.

✅ Before You Answer

• Match the tip shape of each chisel (diamond, flat, round, square) to the shape of a typical oil groove. • Consider which chisel is designed more for general cutting versus forming grooves or channels. • Eliminate any chisel whose shape would leave a flat-bottomed or sharp-cornered cut rather than a smooth groove.