.875 - 1.125 Diameter Flat Bottom Drills

Available in 2:1 & 3:1 Ratio

FB-875 FB-1125.png
  • - 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.
.875 - 1.125 Dia. Flat Bottom Drills
Tool # D Flutes L L-1 D.O.C. S Coolant Plug Insert
FB-875 .875 2-1 Effective 5.000 2.750 1.750 1.000 NPT 1/8 SPEB-2522CB

or

SPEB-2522P
FB-875-3 .875 2-1 Effective 5.750 3.500 2.625
FB-937 .937 2-1 Effective 5.000 2.750 1.875
FB-937-3 .937 2-1 Effective 6.000 3.750 2.812
FB-984 .984 2-1 Effective 5.250 3.000 2.000
FB-984-3 .984 2-1 Effective 6.125 3.875 2.950
FB-1000 1.000 2-1 Effective 5.250 3.000 2.000
FB-1000-3 1.000 2-1 Effective 6.250 4.000 3.000
FB-1031 1.031 2-1 Effective 5.250 3.000 2.062
FB-1031-3 1.031 2-1 Effective 6.250 4.000 3.093
FB-1062 1.062 2-1 Effective 5.250 3.000 2.125
FB-1062-3 1.062 2-1 Effective 6.250 4.000 3.187
FB-1125 1.125 2-1 Effective 5.250 3.000 2.250
FB-1125-3 1.125 2-1 Effective 6.375 4.125 3.375

                 Insert Info.                 

Insert Info.
.875 - 1.125 Dia. Flat Bottom Drills
SPEB-2522CB   SPEB-2522P
Grades X33 / X40 Grade C55
I.C. .312 I.C. .312
T .125 T .125
R .031 R .031
Screw 314T Screw 314T
Wrench T-8 Wrench T-8

Technical Data

Speed and Feed Info.
.875 - 1.125 Dia. Flat Bottom Drills
Material S.F.M. I.P.R.
Mild & Low Carbon Steel
Ex. 1018, 1020, 1117, 1141, 12L14
800 - 1200 .002 - .004
High Carbon & Alloy Steel
Ex. 1045, 4140, 4340, 52100, 8620
500 - 800 .002 - .003
Lower Carbon Tool Steel
Ex. P-20, H-13, S-7
400 - 700 .002 - .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 - .005
Nickel & Titanium Alloy
Ex. Inconel, Hastelloy, TI-6AL-4V
120 - 180 .001 - .002
Non-Ferrous Metal
Ex. Aluminum, Bronze, Brass
1000 - 2500 .003 - .006
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 C55 / 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
C55 Multi-Layer Power Nitride Coating
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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