🔍 Key Concepts
• On a lathe, a right‑hand cutting tool is designed to cut as it feeds from right to left along the workpiece.
• A roughing tool has a stronger, more blunt cutting edge and larger nose radius to remove maximum metal quickly, not to leave a fine finish.
• In Illustration GS-0090, figures P, S, T, and V each show different tool orientations; only one shows a tool shaped and oriented as a right‑hand roughing tool.
💭 Think About
• Looking at the chuck and centers, which way would the carriage travel when using a right‑hand tool? From which side of the work would you start the cut?
• Compare the tool shapes at P, S, T, and V: which has the heaviest, stoutest cutting edge suitable for roughing, and is oriented to cut while feeding right‑to‑left?
• If the tool were fed left‑to‑right, which hand (right vs left) would it have to be? Use that to eliminate any figures that clearly show the wrong hand tool.
✅ Before You Answer
• Confirm which side of the tool shows the main cutting edge and which side is the clearance side; the cutting edge should lead the motion.
• Identify which direction of feed (right‑to‑left vs left‑to‑right) each tool orientation would allow without rubbing the flank of the tool.
• Verify which of P, S, T, or V has both: (1) right‑hand orientation (for right‑to‑left feed) and (2) a heavy roughing profile, not a fine finishing or facing profile.