NTN Deep Groove Ball Bearings 6412, D=60 Carbide NC Spot Drill Item # Description Spreading Capacity Item # Description Spreading Capacity Throat Depth 212 1811 1964711 6" (15 cm) HD Bar Clamp Spreader 9 1 4" 14 7 8" (235 mm 378 mm) 3 5 8" (92 mm) 212 1820 1964712 12" (30 cm) HD Bar Clamp Spreader 9 1 4" 20 7 8" (235 mm 530 mm) 3 5 8" (92 mm) 212 1839 1964713 18" (45 cm) HD Bar Clamp Spreader 9 1 4" 26 7 8" (235 mm 6783 mm) 3 5 8" (92 mm) 212 1848 1964714 24" (60 cm) HD Bar Clamp Spreader 9 1 4" 32 7 8" (235 mm 835 mm) 3 5 8" (92 mm) 212 1857 1964715 36" (91 cm) HD Bar Clamp Spreader 9 1 4" 44 7 8" (235 mm 1140 mm) 3 5 8" (92 mm) 212 1866 1964716 50" (127 cm) HD Bar Clamp Spreader 9 1 4" 58 7 8" (235 mm 1496 mm) 3 5 8" (92 mm) Cut Length: 5 32″