BT-EM (DIN 1835 Form E) :  DIN6359 / DIN 1835 form E drill holders with BT MAS-403 AD tapered shanks.  
 
 
RUNOUT (INT) 0.005MM (.0002 TAPER HARDNESS 58-60 SURFACE FINISH N5 COOLANT
  Designation
SS

d2

D1

D2

L

L1

L5
L
min
L
max

JAdjustment screw has an internal coolant hole.

KeyAdjustment screw hexagon key size

G

Kg
  BT40 EM 32X110 E  40  32.00  72.0  61.00  110.00  83.0  73.00  58.0  68.0  M20X1.5  10.00  M16  2.80
  BT40 EM 32X110 E B  40  32.00  72.0  61.00  110.00  83.0  73.00  58.0  68.0  M20X1.5  10.00  M16  2.85
  BT50 EM 32X115 E  50  32.00  72.0  -  115.00  77.0  -  58.0  68.0  M20X1.5  10.00  M24  5.25
  BT50 EM 32X115 E B  50  32.00  72.0  -  115.00  77.0  -  58.0  68.0  M20X1.5  10.00  M24  5.31

B is the designation for coolant through flange.
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