Combined Drill & Countersink
Which material is right for your job?
Pick a family to narrow SKUs.
Carbide - Long Length
Carbide
Stiffest — resists point wander
Wants a rigid setup
Best for
Production centering, harder material
Cobalt
M42 — holds hardness under heat
Tougher than carbide under load
Best for
Stainless and tough alloys, sizes 1 to 4
HSS
Widest size range, 00000 to 8
Regular and long length
Best for
General lathe work and hole starting
Combined drill and countersink tools, also known as center drills, are used to create an accurate starting point and countersunk center for lathe work or precision hole starting ahead of a full-size drill. We stock these in Carbide, Cobalt, and HSS, with HSS available in both Regular Length and Long Length.
A clean, accurately placed center drill point prevents drill wander on the next operation, which matters most on tight-tolerance or deep-hole work. All combined drill and countersink tools are manufactured in the USA and stocked for same-day shipping.
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Compare SKU Vendor Size Drill Diameter (D1) Shank Diameter Body Diameter (D2) Overall Length (L1) Included Angle Number of Flutes Package Qty Coating In Stock Price Quantity A79073 ACT 5 X 5 3/16 7/16 5.0000 (5) 60° 1 Uncoated 48 $189.13 -
A79074 ACT 5 X 6 3/16 7/16 6.0000 (6) 60° 1 Uncoated 22 $193.78 -
A79087 ACT 5 X 5 3/16 7/16 5.0000 (5) 60° 1 ALTiN 21 $206.23 -
A79088 ACT 5 X 6 3/16 7/16 6.0000 (6) 60° 1 ALTiN 14 $212.29 -
A79075 ACT 6 X 6 7/32 1/2 6.0000 (6) 60° 1 Uncoated 21 $195.92 -
A79089 ACT 6 X 6 7/32 1/2 6.0000 (6) 60° 1 ALTiN 13 $217.61