1.875 - 2.500 Diameter Flat Bottom Drills

Available in 2:1 & 3:1 Ratio

fb-1875 - fb-2500.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.
1.875 - 2.500 Dia. Flat Bottom Drills
Tool # D Flutes L L-1 D.O.C. S Coolant Plug Insert
FB-1875 1.875 2-1 Effective 8.000 5.000 3.750 1.500 NPT 1/4 SPEB-532CB
or
SPEB-532PA
FB-1875-3 1.875 2-1 Effective 9.875 6.875 5.625
FB-2000 2.000 2-1 Effective 8.125 5.125 4.000 1.500 NPT 3/8 SPEB-6352CB

or

SPEB-6352PA
FB-2000-3 2.000 2-1 Effective 10.125 7.125 6.000
FB-2125 2.125 2-1 Effective 9.125 5.625 4.500 2.000 NPT 3/8
FB-2125-3 2.125 2-1 Effective 11.750 8.250 6.375
FB-2250 2.250 2-1 Effective 9.125 5.625 4.500
FB-2250-3 2.250 2-1 Effective 12.125 8.625 6.750
FB-2375 2.375 2-1 Effective 9.625 6.125 5.000
FB-2500 2.500 2-1 Effective 9.625 6.125 5.000
FB-2500-3 2.500 2-1 Effective 12.875 9.375 7.500

 Insert Info.

.625 I.C. Insert for FB-1875 & FB-1875-3

Insert Info.
1.875 Dia. Flat Bottom Drill
SPEB-532CB   SPEB-532PA
Grades X33 / X40 Grades C55
I.C. .625 I.C. .625
T .187 T .187
R .031 R .031
Screw 838T Screw 838T
Wrench T-20 Wrench T-20

.750 I.C. Insert for FB-2000 - FB-2500-3

Insert Info.
2.000 - 2.500 Dia. Flat Bottom Drills
SPEB-6352CB   SPEB-6352PA
Grades X33 / X40 Grade C55
I.C. .750 I.C. .750
T .220 T .220
R .031 R .031
Screw 1012T Screw 1012T
Wrench T-25 Wrench T-25

Technical Data

Speed and Feed Info.
1.875 - 2.500 Dia. Flat Bottom Drills
Material S.F.M. I.P.R.
Mild & Low Carbon Steel
Ex. 1018, 1020, 1117, 1141, 12L14
800 - 1200 .003 - .005
High Carbon & Alloy Steel
Ex. 1045, 4140, 4340, 52100, 8620
500 - 800 .003 - .005
Lower Carbon Tool Steel
Ex. P-20, H-13, S-7
400 - 700 .003 - .005
Tool Steel
Ex. A-2, A-6, D-2, M-2
300 - 600 .002 - .004
Stainless Steel
Ex. 304, 316, 420, 15-5PH, 17-4PH
300 - 600 .002 - .004
Iron
Ex. Cast, Ductile, Nodular
600 - 1000 .003 - .006
Nickel & Titanium Alloy
Ex. Inconel, Hastelloy, TI-6AL-4V
120 - 180 .002 - .003
Non-Ferrous Metal
Ex. Aluminum, Bronze, Brass
1000 - 2500 .004 - .008
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 drill to spindle center
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