specification (规格) d×l guide post diameter (导柱直径) d length (长度) l hole number (孔圈数) ac row number (排数) rc steel ball diametber (钢球直径) do steel ball number (钢球数) balls steel ball distance (钢球距) bp 19×60 19 60 12 10 3 120 5.5 20×60 20 60 12 10 3 120 5.5 22×60 22 60 14 10 3 140 5.5 25×60 25 60 14 10 3 140 5.5 28×70 28 70 14 10 4 140 6.5 31×70 31 70 16 10 4 160 6.5 31×80 31 80 16 11 4 176 6.5 32×50 32 50 16 7 4 112 6.5 32×60 32 60 16 8 4 128 6.5 32×70 32 70 16 10 4 160 6.5 32×80 32 80 16 11 4 176 6.5 36×50 36 50 16 6 4 96 7.0 36×60 36 60 16 8 4 128 7.0 36×70 36 70 16 9 4 144 7.0 36×80 36 80 16 10 4 160 7.0 38×50 38 50 16 5 5 80 8.0 38×60 38 60 16 7 5 112 8.0 38×70 38 70 16 8 5 128 8.0 38×80 38 80 16 9 5 144 8.0 38×90 38 90 16 10 5 160 8.0 40×80 40 80 18 9 5 144 8.0 40×90 40 90 18 10 5 160 8.0 42×70 42 70 18 8 5 144 8.0 42×80 42 80 20 9 5 162 8.0 42×90 42 90 20 10 5 180 8.0 45×70 45 70 20 8 5 160 8.0 45×80 45 80 20 9 5 180 8.0 45×90 45 90 20 10 5 200 8.0 45×100 45 100 20 11 5 220 8.0 45×110 45 110 20 12 5 240 8.0 50×70 50 70 20 8 5 160 8.0 50×80 50 80 20 9 5 180 8.0 50×90 50 90 20 10 5 200 8.0 50×100 50 100 20 11 5 220 8.0 60×90 60 90 22 10 5 220 8.0 60×100 60 100 22 11 5 242 8.0 60×110 60 110 22 12 5 264 8.0