YG-1 D1C90 High Speed Steel Center Drill Bit 1/8″ x 4″ Uncoated

Description

Product Overview

The YG-1 D1C90 center drill bit is engineered from premium high speed steel (HSS), a material renowned for its exceptional hardness, wear resistance, and ability to retain a sharp cutting edge even under high temperature conditions. This uncoated, bright-finished bit measures 1/8″ (3.175 mm) in diameter and extends 4″ (101.6 mm) in length, placing it squarely in the long‑length drill bit category. Its 60° point angle, combined with a slow spiral flute design, delivers a balanced blend of precision entry and chip evacuation, reducing the risk of workpiece deformation and ensuring a clean, round hole. The bit’s geometry is optimized for both metal and wood applications, making it a versatile tool for machinists, hobbyists, and professional technicians alike.

Manufactured by YG-1, a reputable brand in the power tool accessories market, the D1C90 model (item number D1C90096) has been in production since December 2012 and continues to be stocked due to its reliable performance and consistent quality. The product dimensions are compact—5.2 x 0.4 x 0.3 inches—and it weighs only 1.6 ounces, allowing for easy handling and storage. With a best‑seller rank of #72 in the Long Length Drill Bits subcategory, this bit has earned a solid reputation among users, reflected in its 4.2‑star rating from 20 verified customer reviews.

Usage

Designed for a wide range of drilling scenarios, the YG-1 D1C90 excels in applications that demand precise, straight holes over extended depths. In metalworking, it is ideal for creating pilot holes for subsequent tapping, setting up for larger diameter drills, or establishing accurate start points for complex machining operations. Its 60° point reduces the thrust force required to initiate the cut, minimizing the chance of material distortion and extending the life of the bit. In woodworking, the bit’s slow spiral flutes efficiently remove chips, preventing heat buildup and reducing the likelihood of tear‑out, which is especially valuable when working with hardwoods or laminated panels.

Because the bit is uncoated, it can be used with a variety of cutting fluids, including oil‑based lubricants, water‑soluble coolants, or even dry machining in certain contexts. This flexibility allows users to tailor the lubrication strategy to the specific material and environment, optimizing performance and extending tool life. The long shank provides ample reach for deep holes while maintaining rigidity, making it suitable for use in bench‑mounted drill presses, handheld power drills, and CNC spindle setups. Whether you are assembling machinery, fabricating custom fixtures, or performing maintenance on existing equipment, the D1C90 offers the reliability and accuracy required for professional results.

Why Choose Us

Choosing the YG-1 D1C90 means selecting a product backed by a legacy of quality manufacturing and rigorous testing. Each bit undergoes a multi‑stage heat‑treatment process that enhances core hardness while preserving a tough, resilient outer layer, ensuring the cutting edge remains sharp even after repeated use. The precision grinding of the 60° point is performed under controlled conditions to achieve exact tolerances, guaranteeing consistent entry angles and hole geometry across every unit. This attention to detail translates into reduced setup time, fewer tool changes, and higher overall productivity for the end user.

In addition to material excellence, YG-1 provides comprehensive customer support, including technical assistance, warranty coverage, and easy access to replacement parts. Should you encounter any issues or have questions about optimal drilling parameters, the support team is available to guide you through best practices, ensuring you get the most out of your investment. The company’s commitment to continuous improvement means that feedback from field use is incorporated into future product refinements, keeping the D1C90 at the forefront of drilling technology.

Furthermore, the bit’s packaging is designed for durability and convenience. The compact box protects the tool from damage during shipping and storage, while the clear labeling provides quick reference to key specifications such as diameter, length, point angle, and material composition. This user‑centric approach simplifies inventory management for workshops and retailers, reducing the risk of misidentification and streamlining the ordering process.

Key Features

• High speed steel construction delivers superior hardness and heat resistance for long tool life.
• 60° point angle reduces entry force, providing clean starts and minimizing workpiece deformation.
• Slow spiral flute design enhances chip evacuation, reducing heat buildup and improving surface finish.
• Uncoated bright finish allows use with a variety of cutting fluids, offering flexibility across material types.
• Dedicated customer support and warranty ensure confidence and assistance throughout the product’s lifespan.

FAQ

What materials can I safely drill with the YG-1 D1C90?

The bit is suitable for most metals, including steel, aluminum, and brass, as well as hardwoods, softwoods, and engineered wood products. For harder alloys, using a suitable cutting fluid will improve performance and extend tool life.

How does the 60° point angle affect drilling performance?

A 60° point angle provides a sharper tip compared to the more common 118° or 135° angles, allowing the bit to penetrate material with less thrust force. This reduces the risk of bending or breaking the bit and yields a more accurate pilot hole.

Is the uncoated finish a disadvantage for high‑speed applications?

Not at all. The uncoated bright finish offers excellent visibility of the cutting edge and works well with a range of lubricants. When paired with appropriate cutting fluid, the bit can handle high‑speed drilling without excessive wear.

Can I use this bit in a CNC spindle?

Yes. Its 4″ length and 1/8″ shank are compatible with most CNC spindle collets and tool holders. Ensure the spindle speed and feed rates are set according to the material being drilled to achieve optimal results.

What warranty does YG-1 provide for this drill bit?

YG-1 offers a limited one‑year warranty covering manufacturing defects. If the bit fails under normal use within this period, you can contact customer service for a replacement or repair.

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