Small Hole Boring Catalogue Numbering System A/B Series Boring Bar Identification System ABD125375R ABD 125 375 R Insert Style Minimum Bore Bore Depth, Groove Width, Hand Tip Style shown as “D min” Flat on Thread of Tool (optional) shown as “L4, W” A Series = Through Coolant A Series Bore Depth A Series R= Symbol Right hand M ABC = Indexable Boring 06 = 1,58mm 187 = 4,75mm Groove Width Usage ABD = Boring 09 = 2,39mm 281 = 7,14mm (AGD style only) L= Mini tip AGD = Grooving 125 = 3,18mm 312 = 7,93mm 03 = 0,76mm Left hand APD = Profiling 156 = 3,96mm 375 = 9,53mm 04 = 1,02mm ATD = Threading 500 = 12,70mm 05 = 1,27mm (AGD style only) 600 = 15,24mm Thread 095 = 2,79mm 625 = 15,88mm (ATD style only) B Series = Without Coolant 125 = 3,56mm 750 = 19,05mm F2 = 0,05mm 156 = 4,45mm 825 = 20,96mm Flat on thread BB = Boring 875 = 22,23mm BP = Profiling (ATD style only) 1000 = 25,40mm 095 = 2,79mm 1250 = 31,75mm 125 = 3,56mm 1500 = 38,10mm 156 = 4,45mm 1750 = 44,45mm 2125 = 53,98mm B Series 187 = 4,75mm 250 = 6,35mm 312 = 7,93mm D64 widia.com