KnKut 3-Piece Hole Expansion Step Reamer Set (3KK4SR)

The KnKut 3-Piece Hole Expansion Step Reamer Set (3KK4SR) is a USA-made collection of precision tools engineered for accurate hole modification. This set provides the means to effectively start, progressively enlarge, and neatly deburr holes in various materials, accommodating thicknesses up to 1/2 inch. Each reamer in the set is treated with gold oxide, a process that significantly enhances the tool's lubricity and reduces friction during use, thereby increasing its overall toughness and extending its working life. Designed for efficiency, the reamers feature a specialized 90° notch point, ensuring immediate and accurate hole initiation upon contact, eliminating frustrating slippage. The inclusion of five distinct hole enlargement steps on each reamer allows for a controlled and precise expansion process, achieving desired hole sizes with ease. With a standard 3/8-inch shank diameter, these reamers are compatible with most common drill chucks, and the three flats on the shank further secure the tool, preventing any rotation or slipping during operation. This set is an essential addition for professionals and hobbyists seeking reliable and accurate hole expansion capabilities.

KEY FEATURES AND BENEFITS:

• USA-Made Quality: Manufactured in the United States, ensuring adherence to high production standards and material quality.
• Enhanced Performance Gold Oxide Treatment: This surface treatment improves the reamer's ability to glide smoothly through material, reduces heat build-up from friction, and increases the tool's resistance to wear and breakage.
• Accurate Hole Starting: The unique 90° Notch Point design allows for precise and immediate hole initiation on contact, preventing tool walk and ensuring the hole begins exactly where intended.
• Progressive Hole Enlargement: Each reamer features five distinct steps, enabling gradual and controlled enlargement of existing holes to a precise final dimension.
• Effective Deburring: Simultaneously deburrs the edges of the hole as it expands, leaving a clean, finished result.
• Secure Chuck Grip: The 3/8" shank diameter with three flats provides a firm and stable grip in drill chucks, minimizing slippage during use.

SPECIFICATIONS:

• Model Number: 3KK4SR
• Material Thickness Capacity: Up to 1/2 inch
• Shank Diameter: 3/8 inch
• Included in Set:
• (1) Reamer for 5/16" - 9/16" hole sizes
• (1) Reamer for 9/16" - 13/16" hole sizes
• (1) Reamer for 13/16" - 1-1/16" hole sizes

HOW TO USE:

1. Preparation: Secure your workpiece firmly to prevent movement during drilling. Select the appropriate reamer from the set based on your desired final hole size.
2. Mounting: Insert the reamer into your drill chuck, ensuring the 3-flats on the shank are properly gripped. Tighten the chuck securely to prevent slippage.
3. Starting the Hole: Position the 90° notch point of the reamer on the exact center of your intended hole. Apply steady, moderate pressure and begin drilling at a low to medium speed.
4. Enlarging the Hole: As the reamer penetrates, the step design will progressively enlarge the hole. Continue applying consistent pressure and maintain a controlled drilling speed.
5. Deburring: The reamer will naturally deburr the hole edges as it passes through the material. Once the reamer has fully passed through to your desired step, retract it carefully.
6. Finishing: Check the hole for size and cleanliness. Repeat the process with a larger reamer if further enlargement is needed.

BENEFITS OF USING KNKUT 3-PIECE HOLE EXPANSION STEP REAMER SET (3KK4SR):

• Achieves highly accurate hole dimensions without the need for multiple drill bits.
• Simplifies the process of expanding holes and simultaneously cleans up rough edges.
• Reduces work time by combining multiple steps (drilling, deburring) into one tool.
• Provides a cleaner, more professional finish compared to rough drilling or filing.
• The high-quality construction ensures longevity and reliable performance for repeated use.

FEATURES:

• Precision-ground cutting edges for smooth material removal.
• Stepped diameter design for controlled hole expansion.
• Integrated deburring capability.
• Corrosion-resistant gold oxide finish.
• Laser-etched size markings for quick identification.
• Compatible with standard drill presses and handheld drills.
• Engineered for minimal vibration during operation.