Value Collection 01378397 Size 39 Cobalt Drill Bit 135 Deg

Product Description

The VALUE COLLECTION 01378397 is a screw machine length cobalt drill bit designed for high-speed drilling in hard and abrasive materials. Built to a compact 1-13/16 inch overall length, this bit is well suited for work in tight clearances where a jobber-length bit cannot fit. The 135-degree split point geometry reduces thrust, centers the bit without a pilot hole, and allows it to penetrate hardened steel, stainless steel, and other tough alloys. The 2-flute regular spiral design efficiently evacuates chips. At 0.0995 inch diameter (wire gauge size 39), this bit serves precision-hole applications across metalworking and fabrication trades.

Screw machine length drill bits are a common choice on the shop floor and at the machine tool, where short overall length provides rigidity and reduces deflection. This bit is appropriate for use in drill presses, CNC machining centers, and hand-held power drills requiring a straight shank. The heavy-duty grade cobalt construction makes it particularly useful when drilling work-hardening materials such as 304 or 316 stainless, tool steel, and hardened alloys where standard high-speed steel bits wear prematurely. It is sold individually with a minimum order quantity of 12 units.

Key Features

• Cobalt tool material rated for hard and work-hardening metals including stainless steel and alloy steel
• 135-degree split point reduces walking and lowers feed pressure compared to a conventional 118-degree point
• Compact screw machine length overall length of 1-13/16 inches improves rigidity and reduces deflection
• Straight shank fits standard drill chucks without adapters
• 2-flute regular spiral geometry provides efficient chip evacuation
• Heavy-duty drill bit grade for extended service life in demanding applications

Compatibility

Designed as a straight-shank screw machine length drill bit compatible with standard 3-jaw drill chucks on drill presses, CNC machining centers, and portable power drills accepting the straight shank diameter.

Installation Notes

This bit is installed by a machinist or metalworking tradesperson. Secure the straight shank fully into the drill chuck and tighten with a chuck key before operation. Always power down and de-energize the machine before changing bits. Use appropriate cutting fluid or coolant for the work material to extend bit life, noting that this bit does not support through-coolant delivery.