Osg 653534412 Extra Length Drill Bit 0.3438 in Carbide

Product Description

The OSG 653534412 is a solid carbide extra length drill bit designed for deep-hole drilling applications where standard-length tooling falls short. Built on OSG Series 6535, it features a 140-degree split point geometry with X-thinned web to reduce thrust and improve chip evacuation. The EgiAs coating provides enhanced surface hardness and heat resistance, extending tool life in ferrous and hardened materials. The straight-cylindrical shank measures 3/8 inch (0.3750 inches) in diameter, compatible with standard drill chucks and collet holders. This bit is sized at 0.3438 inches cutting diameter with a 15xD flute-to-diameter ratio, making it well suited for precision through-hole work in demanding production environments.

This drill bit is intended for use in CNC machining centers, drill presses, and multi-spindle setups where extended reach is required. The coolant-through design supports high-pressure internal coolant delivery, which is critical for deep-hole drilling in aerospace, die and mold, and general metalworking applications. Right-hand cutting direction and two-flute configuration are standard for this style of bit. Machinists and tooling specialists working in production shops or job shops are the primary installers and operators of this tooling.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• EgiAs coating for elevated heat resistance and extended tool life
• 140-degree point angle with X-thinned web reduces entry thrust and improves centering
• Coolant-through design supports internal high-pressure coolant delivery for deep-hole applications
• 15xD flute-to-diameter ratio enables deep reach beyond standard drill bit capability
• Straight-cylindrical shank fits standard chucks and collet systems without adapters

Compatibility

Designed as an OEM-style replacement or direct-use solid carbide extra length drill bit for production machining setups requiring a 0.3438-inch diameter, 15xD reach tool with coolant-through capability and a 3/8-inch straight shank.

Installation Notes

Installation and setup should be performed by a qualified machinist or tooling technician. Secure the shank fully within the collet or chuck to the recommended grip length before operation, and verify runout with a dial indicator before engaging the workpiece. Always confirm that coolant-through lines are connected and flowing before starting deep-hole cycles. Follow machine tool manufacturer guidelines for feed rates and spindle speeds appropriate to carbide tooling in the workpiece material.