.500 - .656 Diameter Flat Bottom Drills

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  • - Cuts a flat bottom within .001
  • - Coolant Thru - Side & Rear Ports
  • - Helical flute design
  • - Uses the same insert in both pockets
  • - 4 cutting edges per insert
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Tool Info.
.500 - .656 Dia. Flat Bottom Drill
Tool # D Flutes L L-1 D.O.C. S Coolant Plug Insert
FB-500 .500 2-1 Effective 4.000 2.000 1.125 .750 NPT 1/8 SPEB-1511CB
FB-500-3 .500 2-1 Effective 4.500 2.500 1.500
FB-531 .531 2-1 Effective 4.000 2.000 1.125
FB-531-3 .531 2-1 Effective 4.500 2.500 1.593
FB-562 .562 2-1 Effective 4.000 2.000 1.125
FB-562-3 .562 2-1 Effective 4.625 2.625 1.687
FB-593 .593 2-1 Effective 4.000 2.000 1.187
FB-593-3 .593 2-1 Effective 4.687 2.687 1.812
FB-625 .625 2-1 Effective 4.250 2.250 1.375
FB-625-3 .625 2-1 Effective 4.750 2.750 1.875
FB-656 .656 2-1 Effective 4.250 2.250 1.375
FB-656-3 .656 2-1 Effective 4.875 2.875 2.000

Insert Info.

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Insert Info.
.500 - .656 Dia. Flat Bottom Drills
SPEB-1511CB
Grades X33 / X40
I.C. .187
T .082
R .015
Screw 164T
Wrench T-6

Technical Data

Speed & Feed Info.
.500 - .656 Dia. Flat Bottom Drill
Material S.F.M. I.P.R.
Mild & Low Carbon Steel
Ex. 1018, 1020, 1117, 1141, 12L14
800 - 1200 .001 - .003
High Carbon & Alloy Steel
Ex. 1045, 4140, 4340, 52100, 8620
500 - 800 .001 - .003
Lower Carbon Tool Steel
Ex. P-20, H-13, S-7
400 - 700 .001 - .003
Tool Steel
Ex. A-2, A-6, D-2, M-2
300 - 600 .001 - .003
Stainless Steel
Ex. 304, 316, 420, 15-5PH, 17-4PH
300 - 600 .001 - .003
Iron
Ex. Cast, Ductile, Nodular
600 - 1000 .002 - .003
Nickel & Titanium Alloy
Ex. Inconel, Hastelloy, TI-6AL-4V
120 - 180 .001 - .0015
Non-Ferrous Metal
Ex. Aluminum, Bronze, Brass
1000 - 2500 .002 - .003
Insert Grade Selection
Flat Bottom Drills
Material Material Examples Preferred Grade
Mild & Low Carbon Steels 1018, 1020, 1117, 1141, 12L14 X33
High Carbon & Alloy Steels 1045, 4140, 4340, 52100, 8620 X33
Lower Carbon Tool Steels P-20, H-13, S-7 X33
Tool Steels A-2, A-6, D-2, M-2 X33
Stainless Steels 303, 304, 316, 420, 15-5PH, 17-4PH X33
Iron Cast, Nodular X33
Iron Ductile X33
Nickel & Titanium Alloys Inconel, Hastelloy, TI-6AL-4V X33
Non-Ferrous Metals Aluminum, Bronze, Brass X40 / X33
Insert Grade Description
Grade Description
X33 High Performance Nitride Coating
X40 Extremely Smooth Boride Coating

***Important***

  • To maintain correct drill diameter in lathe applications
  • indicate the drill to spindle center.
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