Chicago Latrobe 217B High-Speed Steel Combined Drill Bit and Countersink, Bell Style, Uncoated (Bright) Finish, 60 Degree Angle, Round Shank, Size #17

The Chicago Latrobe 217B high-speed steel combined drill and countersink with an uncoated (bright) finish has a 60-degree countersink and is suitable for maintaining an accurate center hole in multi-step applications. The bell-style countersink includes a 120-degree chamfered section between the countersink and the material surface, providing clearance and reducing the possibility of damaging the center hole or countersink when exposed to multiple machining operations. High-speed steel (HSS) provides hardness for wear resistance. The uncoated finish has no additional surface treatment or coating. The tool has a single cutting end and a round shank that accommodates most drill chucks.Combined drill and countersinks are fluted cutting tools that drill a shallow hole with a conical or gradually widened opening, also known as a countersink, into the surface of a workpiece. These tools, also called combined drill countersinks, drill-point countersinks or center drills, are commonly used to create center holes that act as a bearing surface for a machine center. Some types reduce the two-step process of creating a countersunk pilot hole into one.Chicago-Latrobe manufactures drill bits and accessories, reamers, countersinks, and blanks. The company, founded in 1890 and headquartered in Clemson, SC, meets International Organization for Standardization (ISO) standard 9001.

• Bell-style combined drill and countersink creates a center hole with a 60-degree countersink and provides an additional chamfered section to maintain an accurate center hole in multi-step applications
• High-speed steel (HSS) provides hardness for wear resistance
• Uncoated (bright) finish has no additional surface treatment or coating
• Single-ended tool has a round shank that accommodates most drill chucks
• Made in the USA