Description
The KnKut 21pc HD M35 Cob Jobb. Drill Bit Set 1/16″-3/8″ by 64ths (21KK35) provides exceptional drilling performance for the most challenging materials. Crafted from M35 Cobalt High-Speed Steel, these USA-made drill bits are specifically engineered to drill through tough, high-tensile materials and work-hardening alloys, including high-strength alloy steels, stainless steel, titanium, manganese steel, armor plate, and Inconel. This comprehensive set ranges in size from 1/16 inch to 3/8 inch, with increments of 64ths, ensuring you have the right bit for a variety of tasks.
KEY FEATURES AND BENEFITS:
- M35 Cobalt High-Speed Steel: Provides superior heat resistance, ensuring the drill bits stay sharper for longer, even when drilling through abrasive or high-temperature materials.
- 135° Split Point Tip: Allows for immediate start on contact, preventing the bit from “walking” across the material surface and eliminating the need for a center punch or pilot hole. This saves time and improves accuracy.
- Hex Shanks (3/16″ & Above): Ensures a secure grip within the drill chuck, preventing slippage during high-torque applications and enhancing user control and safety.
- Designed for Tough Materials: Optimally formulated for drilling challenging substances such as high-strength alloy steels, stainless steel, titanium, manganese steel, armor plate, and Inconel.
- Made In USA: Guarantees adherence to high manufacturing standards, offering reliable quality and consistent performance.
- Straw Finish: Adds a layer of heat resistance and can assist in distinguishing the bit type.
SPECIFICATIONS:
- Product Model: 21KK35
- Drill Bit Material: M35 Cobalt High-Speed Steel
- Set Count: 21 Pieces
- Size Range: 1/16 inch to 3/8 inch by 64ths
- Point Angle: 135° Split Point
- Shank Type: Hex shank on sizes 3/16″ and above
- Finish: Straw
- Length Type: Jobber Length
- Country of Origin: USA
HOW TO USE:
- Select the Correct Bit: Choose the appropriate drill bit size (from 1/16″ to 3/8″ by 64ths) for your specific drilling task and material. Ensure it is suitable for the depth and diameter required.
- Secure the Bit: Insert the drill bit firmly into your drill’s chuck. For bits 3/16″ and larger, ensure the hex shank is properly seated to prevent slippage. Tighten the chuck securely to prevent the bit from wobbling or falling out.
- Prepare the Material: Secure the material you intend to drill using a vise, clamps, or another stable method to prevent movement during drilling. This is crucial for safety and accuracy.
- Set Drill Speed: Adjust your drill’s speed setting according to the material. Generally, harder materials require slower speeds, while softer materials can tolerate higher speeds.
- Initiate Drilling: Position the 135° split point tip directly onto your desired drilling location. Apply steady, moderate pressure to initiate drilling. The split point design will start on contact, so a center punch is typically not needed.
- Maintain Pressure and Lubrication (if necessary): Continue applying consistent pressure as the bit cuts. For harder materials like stainless steel or titanium, consider using cutting fluid or coolant to prolong bit life and improve cutting action.
- Clear Chips: Periodically withdraw the drill bit slightly to clear chips from the hole, especially when drilling deep holes. This prevents chip buildup and reduces heat.
- Complete the Hole: Continue drilling until the desired depth or through-hole is achieved.
- Withdraw and Clean: Once done, slowly withdraw the drill bit from the hole. Clean the bit and store the set properly in its case.
BENEFITS OF USING KNKUT 21PC HD M35 COB JOBB. DRILL BIT SET 1/16″-3/8″ BY 64THS (21KK35):
- Provides exceptional cutting performance on notoriously difficult materials, extending tool life and reducing replacement frequency.
- Enhances precision in drilling operations, leading to cleaner holes and fewer errors.
- Offers greater stability during drilling due to advanced shank design, improving user control and safety.
- Reduces overall project time by eliminating preliminary steps like center punching.
- Represents a reliable investment with its robust construction and American manufacturing.
FEATURES:
- High-durability M35 Cobalt composition.
- Precision-ground 135° split point tip.
- Non-slipping hex shanks on larger sizes.
- Optimized for high-tensile and work-hardening materials.
- Eliminates need for center punch or pilot holes.
- Heat-resistant for longer-lasting sharpness.
- Protective straw finish enhances longevity.
- Wide size selection fits various drilling requirements.
- Crafted under strict USA manufacturing standards.






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