Hertel 2386787 Screw Machine Drill Bit 15/64 in Tin Hss

Product Description

The HERTEL 2386787 is a screw machine length drill bit ground from high-speed steel (HSS) with a titanium nitride (TiN) coating. At 15/64 inch (0.2344 inch decimal) diameter, it is sized for precision hole-making in metal fabrication, mechanical assembly, and maintenance applications. The 135-degree split point starts on contact without a center punch, reducing walk on hard or smooth surfaces. The web-thinned, parallel-web construction reduces thrust load and improves chip evacuation. Overall length is 2-7/16 inches with a 1-5/16 inch flute length, making it compact enough for use in tight-clearance setups common in production environments. Licensed trades and industrial machinists rely on this bit for its consistent performance across ferrous and non-ferrous materials.

This bit is suited for screw machine operations, drill press work, and hand-held drilling where a shorter, stiffer bit is preferred over jobber-length alternatives. The straight-cylindrical shank seats in standard three-jaw chucks and quick-change drill holders without modification. The right-hand spiral flute with TiN finish is appropriate for drilling mild steel, stainless, aluminum, and plastics in both shop and field environments. It is sold individually and is a practical choice for maintenance mechanics, pipefitters, and fabricators who need a heavy-duty stub-length bit in a common fractional size.

Key Features

• 135-degree split point starts on contact and reduces walking on smooth workpiece surfaces
• TiN coating increases surface hardness and extends tool life compared to uncoated HSS
• Web-thinned parallel web reduces drilling thrust and improves chip clearing
• Screw machine (stub) length at 2-7/16 inches overall provides added rigidity in deep-reach setups
• Straight-cylindrical shank fits standard chucks and quick-change tooling without adapters
• Heavy-duty grade HSS construction rated for ferrous and non-ferrous materials

Compatibility

Designed as an OEM-style replacement or direct-use screw machine drill bit for any application requiring a 15/64 inch diameter stub-length drill with a straight-cylindrical shank in the 0.2000 to 0.2500 inch decimal size range.

Installation Notes

Install in a standard three-jaw drill chuck or compatible quick-change holder, ensuring the shank is fully seated and the chuck is tightened securely before operation. Confirm workpiece is clamped or fixtured to prevent rotation during drilling. Inspect the cutting edges and TiN coating before each use and replace the bit if chipping or coating wear is visible, as a damaged bit increases the risk of workpiece damage and heat buildup. Always wear appropriate eye protection and follow applicable shop safety procedures when operating drilling equipment.