Value Collection 13-107 Cobalt Jobber Drill Bit 0.1590 in

Product Description

The VALUE COLLECTION 13-107 is a cobalt steel jobber-length drill bit designed for heavy-duty drilling in demanding materials. It features a 135-degree split-point angle that reduces walking and allows faster penetration without a center punch. The bright, straw-finish cobalt construction provides heat resistance above standard high-speed steel, making it suitable for extended run times in tough applications. At 3.25 inches overall length with a 2.125-inch flute, this bit handles typical through-hole drilling in metal stock. It is installed by machinists, fabricators, maintenance mechanics, and experienced trade technicians working with drill presses, lathes, or hand-held power drills.

The 13-107 is rated for use on stainless steel and hardened materials, which are common in HVAC equipment housings, pump bodies, and structural brackets. The straight cylindrical shank at 0.1590 inches diameter fits standard three-jaw chucks without adapters. The regular spiral flute design clears chips efficiently during through-hole and blind-hole operations. This bit corresponds to wire gauge size 21 and a 4.04-millimeter diameter, which are common reference points for technicians working from OEM drill schedules or tapping charts.

Key Features

• Cobalt steel construction — resists heat buildup when drilling stainless steel and hardened materials
• 135-degree standard point angle reduces bit walking and shortens entry time
• Straw finish provides mild oxidation resistance without altering dimensional tolerances
• Double margin design improves hole roundness and size accuracy
• Right-hand cutting, regular spiral flute for efficient chip evacuation
• Wire gauge size 21 (0.1590 inches) — matches common tap drill and clearance drill schedules

Compatibility

Designed for use in any standard drill press, milling machine, or handheld power drill with a three-jaw chuck accepting a 0.1590-inch straight shank. Rated for drilling stainless steel and hardened materials per Series 13 general-purpose heavy-duty classification.

Installation Notes

Secure the workpiece firmly before drilling to prevent rotation and bit breakage. Use cutting fluid or coolant when drilling stainless steel to extend bit life and prevent work hardening at the cut zone. Inspect the cutting edges before use — cobalt bits can chip if dropped or improperly stored. No coolant-through capability on this bit; external fluid application is required for optimal performance in heat-generating materials.