Hertel 61699435 Screw Machine Drill Bit Letter Q Hss

Product Description

The HERTEL 61699435 is a screw machine length drill bit sized to Letter Q (0.3320 inches) with a 118-degree standard point angle. Built from high-speed steel with an oxide coating, this bit is designed for general-purpose drilling in metal, wood, and plastic. The screw machine length body - shorter than jobber length - provides added rigidity and reduced deflection in drill press and CNC applications. With a straight cylindrical shank and right-hand spiral fluting, it seats cleanly in standard chucks. The 3-inch overall length and 1-11/16-inch flute length make it well suited to production environments where stub rigidity matters.

This bit is appropriate for general-purpose shop drilling in light manufacturing, maintenance, and production line applications. The screw machine format is commonly specified on drill presses, turret lathes, and machining centers where shorter tooling reduces chatter and improves hole accuracy. The 3xD flute-to-diameter ratio supports adequate chip evacuation in shallow-to-moderate depth holes across a wide range of workpiece materials.

Key Features

• Letter Q size - 0.3320 inches decimal equivalent
• 118-degree standard point angle for general-purpose entry and centering
• High-speed steel construction with oxide finish for lubricity and corrosion resistance
• Screw machine length (3-inch OAL) for increased rigidity over jobber-length bits
• Right-hand cut with regular spiral fluting for conventional chip ejection
• Straight cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed as a general-purpose screw machine length drill bit compatible with any drill press, lathe turret, or machining center chuck accepting a straight cylindrical shank at 0.3320-inch diameter.

Installation Notes

Installation and use should follow standard machining safety practices - secure the workpiece and confirm chuck grip before operation. Power down the machine and lock out energy before changing tooling. Drilling speeds should be selected based on workpiece material and bit diameter per standard machining reference tables. Coolant-through is not supported on this bit; surface-applied cutting fluid is recommended when drilling ferrous materials.