Seco SD103 Crownlocâ„¢ Exchangeable Tip Drill 9 x 15.88 x 108mm SD103-09.50/09.99-30-0625R7 SD103 Crownloc™ Exchangeable Tip Drill Internal coolant. ISO9766 fits holders: Weldon 1835B, ISO 5414, DIN 60880. Crownloc plus provides you with high productivity, excellent chip evacuation, flexibility and easy handling. These lead to increased output, higher process security, reduction of tool inventory and elimination of regrinding costs. About Crownloc™ Plus: Crownloc™ Plus is a new generation of Seco drills with exchangeable crowns. Featuring a new geometry, coating and locking interface, Crownloc Plus improves chip evacuation and wear resistance in a variety of materials. Crownloc Plus features a strong drill body design, high-strength locking interface with deep and wide flutes and polished body. The drill’s crowns have a new optimized geometry for improved chip formation and enhanced entering capability. The combination of a TiAlN coating, low-friction TiN coating on the exchangeable head and 10% micrograin substrate serve to increase toughness and wear resistance, while reducing the potential for edge build up. The first choice for general applications, the P geometry is a strong and versatile solution that provides reliable operation in applications across a range of different workpiece materials. Utilizing a free cutting drill point to minimize heat generation, the M geometry provides excellent performance in high temperature alloys, titanium, titanium alloys and stainless steel.