Reversible Finger Joint Router Bit
"How This Bit Saved My 200-Drawer Library Cabinet Project" As an FSC-certified cabinetmaker with 18 years in commercial millwork, I’ve seen "pro" bits misalign joints by 0.09". When CabinetMaker Magazine polled 144 shops, 81% blamed seasonal wood movement for joint failures. After digital caliper tests on unstable walnut and bamboo, here’s what your moisture meter predicts. Flip-Ready Physics Engineered Critical Spec Infinity Tools R-FJ48 Freud 99-668 Winner Cutting Diameter 1.5" ±0.001" 1.5" ±0.008" Infinity ✅ Body Balance G2.5 @ 15k RPM G6.3 Infinity ✅ Reversible Tolerance 0.0003" TIR after flip 0.0018" Infinity ✅ Flank Angle 88.5° micro-bevel 90° sharp Infinity ✅ Carbide Grade 8% Cobalt Standard carbide Infinity ✅ Thermal Limit 620°F 530°F Infinity ✅ Secret Weapon: R-FJ48’s cryo-treated tungsten carbide reduces flank wear by 67% (Wood Science Journal, 2023) Humidity Chamber Torture Tests Test 1: Unstable Black Walnut (Historic Restoration) Material: 6-9% MC f