Cle-line C20661 Reduced Shank Drill Bit 5/8 in Hss

Product Description

The CLE-LINE C20661 is a reduced shank twist drill bit designed for drilling through metal, wood, and plastics where a standard shank diameter would exceed the chuck capacity. The bit features a 5/8 inch cutting diameter paired with a 3/8 inch straight-cylindrical shank, allowing use in standard 3/8 inch chucks without requiring a larger chuck. Constructed from high-speed steel with a coated finish, the C20661 delivers reliable wear resistance in production and maintenance drilling applications. The 135-degree split point reduces walking and allows drilling without a center punch on most surfaces.

This bit is suited for trade professionals including machinists, maintenance technicians, HVAC installers, and electricians who need to drill larger-diameter holes using equipment with a 3/8 inch chuck. The reduced shank design makes it practical for portable drills and drill presses with smaller capacity chucks. With a 7-1/8 inch overall length and a flute length of approximately 5.19 inches, it handles standard through-hole applications in light-gauge steel, aluminum, plastic, and similar materials. The right-hand cut and regular spiral flutes promote efficient chip evacuation during drilling.

Key Features

• 5/8 inch cutting diameter with 3/8 inch reduced shank fits standard 3/8 inch chucks
• 135-degree split point reduces drill walking and eliminates the need for center punching on most materials
• High-speed steel construction provides heat resistance and durability in metal drilling
• Coated finish extends tool life by reducing friction and wear
• Right-hand cut with regular spiral flutes for efficient chip removal
• Diameter tolerance of +0.0000 to -0.0012 inches for consistent hole sizing

Compatibility

Designed as a reduced shank drill bit compatible with any 3/8 inch capacity chuck, including portable electric drills and bench drill presses. Part of the CLE-LINE Series 1809 reduced shank drill line.

Installation Notes

Install and remove drill bits only with the drill unplugged or the power source locked out. Secure the shank fully in the chuck and tighten all jaws evenly before use. Wear appropriate eye protection when drilling. Do not exceed the rated speed for the material being drilled, and apply cutting fluid when drilling ferrous metals to extend bit life.