90° Spot Drills - Split Point Design

Patent# 5,259,707

90° Spot Drill Split Point Design.png
  • - 2 Flutes Effective
  • - Split Point design for reduced cutting pressure
  • - Designed for spotting along shoulders
  • - Must be held in a Collet
Split point design Illustration.png
Tool Info.
90° Split Point Spot Drills
Tool # Min Dia. Max Dia. L S Washer Screw Wrench Insert
SDCS-90-500 .093 .500 4.000 .500 251207 325B 1/16" Allen 90-500
SDCS-90-625 .100 .625 5.000 .625 251207 425B T-8 90-625
SDCS-90-750 .125 .750 6.000 .750 251603 638B T-10 90-750

Insert Info.

90 degree Split point .png
Insert Info.
90° Split Point Spot Drills
Insert Grade
90-500 A1M
90-625 A1M
90-750 A1M

Technical Data

Insert Loading Procedure

  • Air Blast Pocket Clean
  • Hold Insert in place (Chisel points to front & rear)
  • -Flatted corners are to prevent loading insert backwards
  • Tighten clamps until each one makes light contact·
  • Alternate tightening screws several times until screws are tight
Speed and Feed Info.
Split Point
Spot Drills
Material S.F.M. I.P.R.
Mild & Low Carbon Steel
Ex. 1018, 1020, 1117, 1141, 12L14
500 - 700 .002 - .004
High Carbon & Alloy Steel
Ex. 1045, 4140, 4340, 52100, 8620
400 - 600 .002 - .004
Lower Carbon Tool Steel
Ex. P-20, H-13, S-7
400 - 600 .002 - .004
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
200 - 400 .002 - .004
Iron
Ex. Cast, Ductile, Nodular
400 - 700 .002 - .004
Nickel & Titanium Alloy
Ex. Inconel, Hastelloy, TI-6AL-4V
120 - 250 .0012 - .0022
Non-Ferrous Metal
Ex. Aluminum, Bronze, Brass
1000 - 2000 .003 - .008
Insert Grade Selection
90° Split Point Spot Drills
Material Material Examples Preferred Grade
Mild & Low Carbon Steels 1018, 1020, 1117, 1141, 12L14 A1M
High Carbon & Alloy Steels 1045, 4140, 4340, 52100, 8620 A1M
Lower Carbon Tool Steels P-20, H-13, S-7 A1M
Tool Steels A-2, A-6, D-2, M-2 A1M
Stainless Steels 303, 304, 316, 420, 15-5PH, 17-4PH A1M
Iron Cast, Ductile, Nodular A1M
Nickel & Titanium Alloys Inconel, Hastelloy, TI-6AL-4V A1M
Non-Ferrous Metals Aluminum, Bronze, Brass A1M
Insert Grade Description
90° Split Point Spot Drills
Grade Description
A1M Tin Coated
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