TT-56 Impregnated Diamond Core Bit

Size TT-56 Design Metric
Outer diameter MAX (mm) 56.13 Outer diameter MAX (in) 2.210
Outer diameter MIN (mm) 55.88 Outer diameter MIN (in) 2.200
Inner diameter MAX (mm) 45.41 Inner diameter MAX (in) 1.788
Inner diameter MIN (mm) 45.16 Inner diameter MIN (in) 1.778
Hole diameter (mm) 56.5 Hole diameter (in) 2.22
Core diameter (mm) 45.2 Core diameter (in) 1.78
Hole area (cm2) 24.9 Hole area (in2) 3.86
Core area (cm2) 16.0 Core area (in2) 2.48