Cleveland C09673 3/8" HSS 118° Jobber Drill Bit

Application & User

This Cleveland C09673 jobber drill bit is made from high-speed steel with a black oxide finish for general-purpose machining. The 118-degree conventional point suits standard drilling tasks in metal, wood and plastic. It is intended for trade users and DIYers who need a single fractional-inch bit for everyday workshop jobs. Buyers requiring extra-long reach beyond the 5 1/2 in maximum drilling depth or specialised coatings for abrasive alloys should look elsewhere.

Standard Limits

The 4xD length-to-diameter ratio and 28-degree helix angle define the practical chip-clearance envelope for this geometry. Deep holes in stainless steel or hardened materials may exceed the flute’s ability to evacuate swarf without frequent pecking. The 118-degree point angle is optimised for conventional drilling rather than high-feed or self-centring applications. Users needing faster penetration in tough alloys or tighter hole tolerances will find the standard geometry restrictive.

Build & Connectors

High-speed steel construction with black oxide treatment provides baseline wear resistance and reduced galling during extended use. The straight round shank fits standard three-jaw chucks and quick-change adapters without additional sleeves. Extra-long jobber length increases reach but also amplifies run-out if the chuck is worn, so regular chuck maintenance becomes more important. The bit has no flats or reduced shank, so it cannot be used in collets or impact drivers that require a hex or reduced-diameter shank.