® Mini Chamfer and Countersink Mini Chamfer Optimal for deburring, back chamfering and grooving. Double side cutting. Spiral flute allows smooth cutting action. Demonstration Carbide grade: MT8 Sub-micron grade with advanced PVD triple coating (ISO K10-K20). Extremely high heat resistant and smooth cutting operation, for high performance and normal machining condition. General purpose for all materials. ↓ ↓ 0.2 Grade P M K N S H 90˚ MT8      ≤ 50 HRc Ordering Code d D I H B α No. ofFlutes L MC 03015 C3 A90 3 1.5 3.8 0.3 0.4 90˚ 3 39 MC 0302 C5 A90 3 2.0 5.0 0.4 0.5 90˚ 3 39 MC 03025 C6 A90 3 2.5 6.3 0.5 0.6 90˚ 3 39 MC 0303 C7 A90 3 3.0 7.5 0.6 0.7 90˚ 3 39 MC 04035 C9 A90 4 3.5 8.8 0.7 0.8 90˚ 3 51 MC 0404 C10 A90 4 4.0 10.0 0.8 0.9 90˚ 3 51 MC 05045 C11 A90 5 4.5 11.3 1.0 1.1 90˚ 3 51 MC 0505 C12 A90 5 5.0 12.5 1.1 1.2 90˚ 3 51 MC 06055 C13 A90 6 5.5 13.8 1.2 1.3 90˚ 3 51 MC 0606 C15 A90 6 6.0 15.0 1.5 1.6 90˚ 3 51 Order example: MC 0302 C5 A90 MT8 First choice Alternative B15-3 ↓ ↓