Selection Mistakes Views: 14

Common countersink selection mistakes: 1) Harder is better - ignoring brittleness; high-hardness tools chip; choose by material and conditions; 2) More expensive is better - assuming imported/expensive means best; fit matters more; 3) Angle roughly chosen - wrong angles leave unseated screw heads and uneven chamfers; always follow the screw standard or drawing; 4) Diameter roughly chosen - too small leaves incomplete chamfers, too large wastes material; choose by the maximum chamfer diameter; 5) Price-only buying - the cheapest option wears fast, changes tools often, scrapes batches and costs more overall; 6) Ignoring coating - coatings markedly improve life and finish; hard-to-machine materials should always use coated tools; 7) One tool for everything - stainless steel wears it fast, aluminum welds on it; match material, grade and coating to the job; 8) Ignoring the machine - big tools on small machines vibrate and lose precision; match tool size to machine rigidity. How to avoid: 1) material first - material decides grade and coating; 2) then the angle - per screw standard or drawing; 3) chamfer size - choose diameter by the maximum chamfer; 4) volume and requirements - high volume and high demands: premium tools; small volume and ordinary demands: value tools; 5) sample first - test before bulk buying. If unsure, ask our technical team for a recommendation.