ST-ER-S :  DIN 6499 ER collet chucks with coolant holes and cylindrical shanks.  
 
 
RUNOUT (INT) 0.005MM (.0002 HARDNESS 58-60 SURFACE FINISH N5 COOLANT
  Designation
SS
CSI		 d
min		 d
max
L2
L
L1
J
D3
D2
T
Kg
  ST 20X 65 ER25S  20  ER25  1.0  16.0  65.00  72.00  32.0  M12  42.00  54.00  51.0  0.30
  ST 25X 65 ER25S  25  ER25  1.0  16.0  65.00  72.00  32.0  M12  42.00  54.00  50.0  0.87

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