R-8 ER :  DIN 6499 ER collet chucks with Bridgeport shanks.  
 
 
RUNOUT (INTERNAL) 0.003  TAPER  HARDNESS 58-60  SURFACE FINISH N5  COOLANT 
  Designation
SS
CSI		 d
min		 d
max
L
D3
J
G
Kg
  R-8 ER16X38  R-8  ER16  0.5  10.0  38.00  28.00  M10  7/16-20  0.54
  R-8 ER32X40  R-8  ER32  2.0  20.0  40.00  50.00  M12  7/16-20  0.42
  R-8 ER40X72  R-8  ER40  3.0  26.0  72.00  63.00  M12  7/16-20  0.84

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