Exact 38244 Spiral Drill Bit User Manual

Introduction

This manual provides comprehensive instructions for the safe and effective use of the Exact 38244 Spiral Drill Bit. This high-speed steel ground (HSS-G) drill bit conforms to DIN 338 standards, featuring a Form C, Type N design with a reduced shank. It is specifically engineered for drilling larger diameters, compatible with standard drills equipped with a chuck up to 13.0 mm.

Product Overview

Figure 1: Exact 38244 Spiral Drill Bit. This image displays the full length of the drill bit, highlighting its spiral flutes and reduced shank.

Figure 2: Close-up view of the reduced shank. This image focuses on the cylindrical portion of the drill bit designed to fit into smaller chucks.

The Exact 38244 drill bit is manufactured from HSS-G (High-Speed Steel Ground) for enhanced durability and precision. Key features include:

• Material: HSS-G (High-Speed Steel Ground)
• Standard: DIN 338
• Type: N
• Shank: Reduced shank, diameter 13 mm, allowing use with drills having a 13 mm chuck capacity.
• Tip Cut: Form C - split cut, for improved centering and reduced thrust force.

Setup

Proper setup is crucial for safe and effective drilling. Always wear appropriate personal protective equipment (PPE), including safety glasses, before beginning any drilling operation.

1. Select the Correct Drill: Ensure your drill has a chuck capacity of at least 13 mm to accommodate the reduced shank of this drill bit.
2. Clean the Chuck: Before inserting the drill bit, ensure the drill chuck jaws are clean and free of debris.
3. Insert the Drill Bit: Insert the reduced shank of the drill bit fully into the drill chuck. Ensure the shank is seated as deeply as possible to minimize runout and maximize grip.
4. Tighten the Chuck: Hand-tighten the chuck firmly. For keyless chucks, ensure an audible click or firm resistance is felt. For keyed chucks, use the chuck key to tighten all three jaws securely. Do not overtighten, as this can damage the chuck or the drill bit shank.
5. Verify Security: Gently pull on the drill bit to confirm it is securely held in the chuck. The drill bit should not slip or wobble.

Operating Instructions

This drill bit is designed for general-purpose drilling in various materials, including alloy steel. Always prioritize safety during operation.

Figure 3: The Exact 38244 drill bit actively drilling into a metal surface, showing metal shavings being produced.

1. Material Preparation: Secure the workpiece firmly using clamps or a vise to prevent movement during drilling. Mark the drilling location accurately.
2. Pilot Hole (Optional): For very large holes or hard materials, consider drilling a smaller pilot hole first to aid in centering and reduce strain on the larger drill bit.
3. Drilling Speed: Select an appropriate drilling speed for the material. Generally, harder materials require slower speeds, while softer materials can tolerate higher speeds. Refer to drill manufacturer guidelines for specific speed recommendations.
4. Apply Pressure: Apply steady, consistent pressure to the drill. Avoid excessive force, which can cause the drill bit to overheat, dull prematurely, or break.
5. Lubrication/Coolant: For drilling in metals, especially harder ones, use a suitable cutting fluid or coolant to reduce friction, dissipate heat, and extend the life of the drill bit.
6. Chip Clearance: Periodically withdraw the drill bit from the hole to clear chips and allow coolant to penetrate. This prevents chip packing and overheating.
7. Safety Precautions:
   • Always wear safety glasses to protect against flying debris.
   • Wear appropriate gloves to protect hands, but avoid loose-fitting gloves that could get caught in rotating machinery.
   • Do not wear loose clothing or jewelry that could become entangled.
   • Ensure adequate ventilation, especially when using cutting fluids.
   • Disconnect power before changing drill bits or performing maintenance.

Maintenance

Proper maintenance extends the life and performance of your drill bit.

• Cleaning: After each use, clean the drill bit to remove chips, dust, and residue. A stiff brush or compressed air can be used. Ensure the bit is dry before storage.
• Lubrication/Corrosion Protection: Apply a thin coat of machine oil or rust preventative to the drill bit, especially if it will be stored for an extended period or in a humid environment. This prevents corrosion of the HSS-G material.
• Storage: Store the drill bit in its original packaging or a dedicated drill bit case to protect the cutting edges from damage and prevent contact with other tools that could cause dulling or chipping. Store in a dry place.
• Sharpening: If the drill bit becomes dull, it can be professionally sharpened or sharpened using appropriate drill bit sharpening tools. A dull drill bit will generate excessive heat, produce poor quality holes, and require more force to operate.

Troubleshooting

Refer to the following table for common issues and their potential solutions.

Specifications

Detailed technical specifications for the Exact 38244 Spiral Drill Bit.

Warranty and Support

For information regarding product warranty, returns, or technical support, please refer to the official Exact product documentation or contact your point of purchase. Specific warranty terms may vary by region and retailer.

For further assistance, you may visit the Exact brand page on Amazon.in.