σ1 σ2 Modular Drills Chamfering and Countersinking Order Planning Please utilise guide below to plan your TOP DRILL M1™ modular step drill based on your needs and requirements. Please contact your distributor for a quote. Option 3 TOP DRILL M1 Drilling and Countersinking and Chamfering Overall Length [L] Drill Length [L1] Shank Diameter [D] Drill Diameter Min [D1] Drilling Depth [DD] Cut Diameter 23 [D23] Countersinking Depth [DD1] Cutting Diameter 2 Angle m1 Cutting Diameter 3 Angle m2 Chamfering depth [CD] If a more complex tool is required, we need your individual information to serve your specific needs. Please contact your WIDIA™ distributor for further guidance. widia.com U19