Wood turning and shaping
Wood turning and shaping
This domain tests lathe setup, tool selection, cutting technique and safe shaping of cylindrical and faceplate work.
Core rules
- Two main modes: spindle turning between centres and faceplate turning on a faceplate or chuck.
- Tools: roughing gouge for square-to-round; spindle gouge for details; skew chisel for planing cuts; parting tool for diameter and depth; scraper for fine finishing.
- Sharpening is continuous: grind or hone the bevel, keep the tool rest close at about 2–3 mm, and rotate the tool rest before adjusting.
- Speed: large or out-of-balance blanks run slowly; small spindles can run faster. Always start slow and increase.
- Mounting: find centres, saw a kerf for a drive spur or use a chuck, engage the tailstock centre, and check the blank is secure.
- Shaping: cut downhill with the grain, keep the bevel rubbing, and do not overhang the tool rest.
Worked example
A 50 mm square blank is to become a 45 mm diameter cylinder. Mark diagonals to find centres. Mount between centres. The largest cylinder from the square is 50 mm; 45 mm leaves 2.5 mm radial cleanup. Set the tool rest 2–3 mm from the corners and rotate by hand to check clearance. Start at a low speed, rough to round with a roughing gouge, then refine with a spindle gouge and skew. Reasoning: the diagonal is larger than the side, so the corners must be removed; checking clearance prevents the blank hitting the rest.
Traps
Tool rest too far away; using a scraper as a roughing tool; turning green timber without allowing movement; sanding across the grain; leaving the chuck key in place.