DR-2XD (53-60 mm 2xD) :  DR indexable HELIQUAD insert drills. Drilling depth 2xD.  
 
 
Drilling  
  Designation
D

L

L1
D
maxBy shifting drill center along lathe X-axis.

d

D3

L4

cc
  DR056-112-40-16  56.00  112.0  146.0  57.00  40.00  60.00  68.0  R1/4
  DR057-114-40-16  57.00  114.0  148.0  57.50  40.00  60.00  68.0  R1/4

Hole diameter can be changed by shifting drill center along lathe X-axis.
Hole tolerance: D+0.15/-0.05 in average conditions. However, it can be higher or lower according to machine and tooling conditions.
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