TDO-I (D18.41-65.00) :  Double-tube drill system (DTS), 4 start thread connection outer tubes.  


 
 
  Designation d
Range

D3

d2

L2
Int
Tube

d

D5
L
min
L
max
  TDO-I4 L=(0-630)MM  26.41-28.70  26.00  23.50  33.00  TDI-N4  18.00  16.00  0.0  630.0
  TDO-I4 L=(631-1070)MM  26.41-28.70  26.00  23.50  33.00  TDI-N4  18.00  16.00  631.0  1070.0

Please indicate overall length (L) when ordering
Ordering example: TDO-I13-L1100
For 18.41-65.00 diameter range, the inner tube should be 30 mm longer than the outer tube
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