Is wood dust really dangerous?

Yes. The International Agency for Research on Cancer classifies wood dust as a Group 1 carcinogen — the same category as asbestos and tobacco. Fine wood dust particles (under 10 microns) penetrate deep into lungs and cause nasal cancer, sinonasal cancer, and chronic respiratory disease. Hardwood dusts (oak, maple, walnut) are more dangerous than softwood dusts but all wood dust poses health risks. Dust collection, air filtration, and respiratory protection are not optional for woodworkers.

Do I need a digital caliper or is a ruler enough?

For rough carpentry and construction: a tape measure and ruler are sufficient. For furniture-quality joinery (mortise and tenon, dovetails, dados): a digital caliper is essential. The difference between a tight-fitting tenon and a loose one is often 0.005-0.010 inches — impossible to measure with a ruler. A caliper costs $15-120 depending on quality and pays for itself by eliminating ill-fitting joints that require re-cutting.

Best Tech for Woodworking Shop 2026