BT-SEM :  ISO 3937 shell mill holders with BT MAS-403 AD tapered shanks.  
 
 
RUNOUT (EXT) 0.005MM (.0002 TAPER HARDNESS 58-60 SURFACE FINISH N5 COOLANT
  Designation
SS
d
D1
L
L2
L1
G
Kg
  BT30 SEM 22X 50  30  22.00  47.0  50.00  19.00  28.0  M12  0.77
  BT40 SEM 22X 60  40  22.00  47.0  60.00  19.00  33.0  M16  1.45
  BT40 SEM 22X120  40  22.00  47.0  120.00  19.00  93.0  M16  2.38
  BT50 SEM 22X 50X220  50  22.00  50.0  220.00  19.00  182.0  M24  6.52
  BT50 SEM 22X 64X320  50  22.00  64.0  320.00  19.00  282.0  M24  10.51
  BT50 SEM 22X 75  50  22.00  47.0  75.00  19.00  37.0  M24  4.10
  BT50 SEM 22X120  50  22.00  47.0  120.00  19.00  82.0  M24  4.63

Add B as suffix to the designation for coolant through flange.
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