YG-1 DTX408081 Solid Carbide Jobber Drill Bit 8.1 Mm

Product Description

The YG-1 DTX408081 is a solid carbide jobber-length drill bit designed for precision drilling in steel and similar ferrous workpiece materials. The bit carries a TiAlN coating for heat resistance during high-speed operations and features a 140-degree self-centering point that reduces walking and improves hole entry accuracy. With an overall length of 4.058 inches and a flute length of 2.403 inches, it fits standard jobber-length applications without adapter modification. The straight-cylindrical shank measures 10 mm in diameter and seats securely in drill chucks or collet systems. Web thinning reduces thrust load at the cutting tip, making it well-suited for production or repetitive drilling tasks in machine shop and industrial settings.

This drill bit is intended for right-hand cutting operations on steel workpieces, classified under primary workpiece material code P. It belongs to the DH408 series, which is rated for a flute-to-diameter ratio of 8xD, supporting deeper-hole drilling within its 2.403-inch maximum drilling depth. The 8.1 mm diameter is equivalent to 0.3191 decimal inch, placing it in the 8.00 to 9.00 mm size range. Typical users include machinists, tool-and-die technicians, and manufacturing maintenance personnel working with CNC or manual drill press equipment where coolant-through capability can be utilized.

Key Features

• Solid carbide construction with TiAlN coating for elevated thermal resistance during high-speed steel drilling
• 140-degree self-centering point reduces drill walk and improves entry accuracy without a center punch
• Coolant-through design supports internal coolant delivery to extend tool life in production environments
• R-thinned web reduces axial thrust, lowering spindle load during deep-hole passes
• Straight-cylindrical shank with h6 diameter tolerance ensures consistent seating in drill chucks and collets
• Regular spiral flute with 2-flute configuration efficiently evacuates chips from steel workpieces

Compatibility

Designed as a general-purpose jobber-length drill bit for drilling operations in steel workpieces. Compatible with drill chucks and collet holders accepting a 10 mm straight-cylindrical shank. Fits within the 8.00 to 9.00 mm drill bit size range of compatible toolholding systems.

Installation Notes

Installation and use should be performed by qualified machinists or tooling technicians familiar with rotary cutting tool safety. Secure the shank fully in the chuck or collet and verify concentricity before beginning a cut. Ensure the drilling machine is powered down and at a full stop before changing or inspecting the bit. When using the coolant-through feature, confirm the machine spindle coolant circuit is rated for the supply pressure being applied.