Value Collection 01190099 Cobalt Jobber Drill 9/64 in

Product Description

The VALUE COLLECTION 01190099 is a cobalt jobber-length drill bit designed for demanding metal drilling applications. Built from heavy-duty cobalt steel with a straw finish, it features a 135-degree split point that reduces walking at bit entry and requires less thrust to start the cut. The straight cylindrical shank seats securely in standard 3-jaw chucks. At 9/64 inch (0.1406 inch decimal) diameter with a 1-3/4 inch flute length and 2-7/8 inch overall length, this bit suits precision hole-making in tight clearances where smaller-diameter cutting tools are required. Right-hand cutting direction with a regular spiral flute pattern clears chips efficiently during through-drilling operations.

This bit is intended for use on stainless steel and hardened materials where standard high-speed steel bits lose their edge prematurely. Cobalt construction maintains hardness at elevated temperatures generated by hard-alloy drilling. Typical applications include fabrication shops, maintenance and repair operations, HVAC sheet metal work involving stainless components, and plumbing or mechanical contractors drilling through hardened fasteners or structural steel members. Coolant-through capability is not available on this bit, so surface or flood cooling is the recommended approach when drilling production quantities.

Key Features

• Cobalt construction with straw finish for heat resistance during hard-metal drilling
• 135-degree split point reduces walking and lowers required feed pressure at entry
• Regular right-hand spiral flute promotes consistent chip evacuation
• Heavy-duty grade suitable for stainless steel and hardened materials
• Straight cylindrical shank fits standard drill chucks without adapters
• 1-3/4 inch flute length allows adequate depth in typical jobber-length applications

Compatibility

Designed as a standard jobber-length drill bit compatible with any drill press, hand drill, or CNC spindle accepting a straight cylindrical shank in the 9/64 inch size range. Fits drill bit size range of 0.1000 to 0.1500 decimal inch.

Installation Notes

A licensed machinist, sheet metal mechanic, or qualified maintenance technician should secure the bit firmly in the chuck before operation. Ensure the workpiece is clamped or fixtured to prevent rotation during drilling. Use appropriate cutting fluid or flood coolant on stainless steel and hardened materials to extend bit life and manage heat buildup. Inspect the split point for chipping or dulling before each use, as cobalt bits subjected to excessive heat or side-loading can micro-fracture at the tip.