... 40 * Thickness 2.0 mm * Teeth 80 ( PIN hole: 2/8/55, 4/12/64 )Material: HSS M35 (HSSE)Surface treated ... ,400mm,425mm Thickness: 1.2mm;1.6mm,2.0mm,2.5mm,3.0mm Bore diameter: 25.4mm;32mm;38mm;40mm;50mm ... or customer bore size. Pin hole size: Bore 32mm: 2*Ø8.5mm*45mm+2*Ø12mm*64mm with 2*Ø9.0mm*50mm on ... request. Bore 40mm: 2*Ø8.0mm*55mm+4*Ø12mm*64mm Bore 50mm: 4*Ø15mm*80mm ...