DC RE DCONMS Profile MillingSlot MillingShoulderMillingFace MillingHigh FeedMilling BBB2000 T-CBN ball nose endmill for dies and molds LF LBX LH Designation BX850 NOF RE DC LH LBX LF DCONMS BBB2006 z 2 0.3 0.6 0.5 1.2 50 6 BBB2008 z 2 0.4 0.8 0.6 1.6 50 6 BBB2010 z 2 0.5 1 0.7 2 50 6 BBB2020 z 2 1 2 1.5 4 50 6 z: Line up Tolerance (BBB2000) R R Tolerance Tolerance on shank 0.3 ~ 1 ±0.005 h6 S TA N D A R D CUTTING CONDITIONS Ball radius (RE) ISO Workpiecematerial Hard-ness No. of 0.3 0.4 0.5 1revolutions Depth of cutn (min-1)APMX × pfFeed rateDepth of cutAPMX × pfFeed rateDepth of cutAPMX × pfFeed rateDepth of cutAPMX × pfFeed rate (mm) (mm/min) (mm) (mm/min) (mm) (mm/min) (mm) (mm/min) Prehardened steel (NAK80, etc.)Die steel~ 52 HRC 50,000 0.02 × 0.03 2,000 0.03 × 0.05 2,000 0.05 × 0.05 3,000 0.10 × 0.10 5,000 (JIS SKD61, etc.) Die steel (JIS SKD11, ~ 62 HRC 50,000 0.01 × 0.02 2,000 0.02 × 0.03 2,000 0.03 × 0.05 3,000 0.05 × 0.05 5,000 DRM1 & 2, etc.) High speed steel, Die steel ~ 70 HRC 50,000 0.01 × 0.02 1,500 0.01 × 0.03 1,500 0.02 × 0.03 2,000 0.03 × 0.05 3,000 (JIS SKH, DRM3, etc.) Notes: • Depths of cut (APMX) shown in the table are the allowable maximum values. • Mist cooling or air blow is recommended. • The maximum number of revolutions of the machine to be used is lower than 50,000 min-1, the revolutions and feed rate should be modified at same rate. • Use smallest possible overhang. Ball radius (RE) Inclined angle of workpiece (θ1) / Effective neck length (Z) 0.3 0°30 /ź 1.25 1°/1.30 2°/1.35 3°/1.45 0.4 0°30 /ź 1.65 1°/1.70 2°/1.80 3°/1.90 0.5 0°30 /ź 2.05 1°/2.10 2°/2.25 3°/2.40 1 0°30 /ź 4.15 1°/4.25 2°/4.50 3°/4.80 H236 www.tungaloy.com