Value Collection 100312SR Gun Drill Bit 29/64 Inch Carbide

Product Description

The VALUE COLLECTION 100312SR is a single-flute gun drill bit designed for deep-hole drilling in demanding metalworking applications. Built with a carbide-tipped construction and a bright uncoated finish, it delivers consistent performance in materials such as Inconel, stainless steel, and steel. The 29/64 inch cutting diameter holds a tight tolerance of plus 0.0005 to minus 0.0005 inches. The 115-degree drill point angle and N-8 Nosegrind point type help maintain accurate entry and exit geometry. Through-coolant capability via a round coolant hole supports chip evacuation and thermal management during extended cuts. Licensed HVAC and machining professionals handling deep-bore work will recognize the R-1 Low Land contour style and web-thinned geometry as standard features for gun drilling setups.

This bit is suited for deep-hole drilling operations in metalworking environments where hole depth, straightness, and finish are critical. It is used in production machining, toolroom work, and specialty fabrication involving hard alloys including Inconel and stainless steel. The 18-inch flute length and 22-inch overall length make it appropriate for bore depths up to 19 inches. The 3/4 inch shank diameter seats in standard gun drill holders, and the 4-inch shank length with a 2-3/4 inch drive length aligns with common deep-hole drilling machine setups.

Key Features

• 29/64 inch cutting diameter with plus or minus 0.0005 inch tolerance for precise bore sizing
• Single-flute gun drill configuration with web-thinned geometry for efficient chip removal in deep holes
• Through-coolant support via round coolant hole for thermal control and extended tool life
• 115-degree drill point angle with N-8 Nosegrind for clean entry in hard alloys
• Carbide-tipped construction rated for Inconel, stainless steel, and steel
• Bright uncoated finish suitable for applications where coating interaction with workpiece material is a concern

Compatibility

Designed for use in deep-hole gun drilling machines and setups that accept a 3/4 inch shank diameter. Rated for material applications including Inconel, stainless steel, and steel.

Installation Notes

Gun drill bits of this type are installed and operated by qualified machinists using dedicated gun drilling machines or deep-hole drilling equipment. Ensure the spindle and workholding are fully powered down and locked out before mounting or removing the bit. Confirm coolant line connections are secure before initiating through-coolant flow. Do not exceed the recommended depth of cut for the material being bored.