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 ER32S  20  ER32  2.0  20.0  65.00  77.00  41.0  M12  50.00  63.00  59.0  0.96
  ST 25X 65 ER32S  25  ER32  2.0  20.0  65.00  77.00  41.0  M16  50.00  63.00  59.0  1.20
  ST 32X 65 ER32S  32  ER32  2.0  20.0  65.00  77.00  41.0  M18X1.5  50.00  63.00  59.0  1.14
  ST 40X 75 ER32S  40  ER32  2.0  20.0  75.00  77.00  41.0  M22X1.5  50.00  63.00  59.0  4.60

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