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Table 1 Specification of hollow drill tool and twist drill bit

From: In-situ tool wear monitoring and its effects on the performance of porcine cortical bone drilling: a comparative in-vitro investigation

Diamond coated hollow drill tool

Twist drill bit

Outer diameter

4.5

Number of cutting lips

2

Inner diameter

2.9

Helix angle:

8.4°

Mesh size

80–100

Point angle

120°

Areal average abrasive/grain density

15 abrasive/mm2

Tool base material:

Stainless steel

Abrasive/grain type

Diamond

  

Tool shank material

EN-31

  

Abrasive/grain coated method

Electroplating