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DeWalt HSS-E Cobalt Metal Drill Bit - 5mm

DeWalt HSS-E Cobalt Metal Drill Bit - 5mm

The DT4906 Dewalt cobalt drill bit is 8% cobalt which maintains a sharper cutting edge and deliver...

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Product Information

Full details

This guide is for anyone using the DeWalt DT4906-QZ 5mm Cobalt Metal Drill Bit, designed for drilling into tough materials like stainless steel and cast iron. The key benefit is its durability and ability to maintain a sharp cutting edge, offering up to 4x longer life compared to standard bits. Keep in mind that optimal performance depends on using the correct speed and pressure for the material.

All features

Model Part NumberDT4906-QZ
BrandDeWalt

Extended Product Information

FAQs

What materials is this drill bit suitable for?

This drill bit is designed for use with bronze, cast iron, metal, stainless steel, and steel.

How long will this drill bit last?

The DT4906-QZ offers up to 4x longer life compared to standard DeWalt Black Oxide bits due to its cobalt construction and optimized design. Actual lifespan depends on usage.

Can I use this bit with a cordless drill?

Yes, this drill bit is compatible with both corded and cordless drills.

What is the benefit of the non-slip shank?

The non-slip shank with 3 milled clamping surfaces prevents the bit from slipping in the drill chuck, ensuring optimal power transmission.

What is the recommended drilling speed?

The recommended drilling speed varies depending on the material. Use lower speeds for harder materials and higher speeds for softer materials. Always consult the material manufacturer's recommendations.

How do I maintain the drill bit?

Use cutting oil or coolant, apply even pressure, and store the bit in a dry place. Inspect it regularly for wear.

What is the purpose of the cobalt in the drill bit?

The 8% cobalt content maintains a sharper cutting edge, increasing the bit's durability and lifespan.

What is the working length of the drill bit?

The working length of the drill bit is 5.2 cm.

Troubleshooting

Drill bit is not penetrating the material.

Check drill speed and pressure. Increase the speed slightly and apply more pressure if appropriate for the material. Ensure the drill bit is sharp. Consider using a pilot hole for hard materials.

Drill bit is breaking.

Reduce pressure. Check the drill speed and adjust as needed. Ensure the bit is properly aligned and not angled during drilling.

Holes are not clean or accurate.

Check the drill speed and feed rate. Make sure the bit is sharp and in good condition. Use a pilot hole. Ensure the workpiece is securely clamped.

Drill bit is overheating.

Reduce the drilling speed. Apply cutting oil or coolant to the bit and the work surface.

Pros and Cons

Pros

  • Exceptional Durability: Offers significantly longer life compared to standard drill bits.
  • Fast Drilling: Optimized design allows for quicker penetration and material removal.
  • Precision: Provides cleaner and more accurate holes, reducing the need for reaming.
  • Reduced Breakage: Strong core design enhances resistance to breakage during use.
  • Versatile Use: Suitable for a wide range of materials, including challenging metals.
  • Ease of Use: Non-slip shank ensures a secure grip in the drill chuck, improving control.

Cons

  • Higher initial cost compared to standard drill bits.
  • Requires proper usage (speed and pressure) for optimal performance.
  • May not be ideal for softer materials where the cobalt's hardness isn't necessary.
  • Limited to a 5mm diameter in this specific model, so might require other sizes.
  • Cobalt bits can be more brittle than other high-speed steel bits.

Setup, Compatibility & Care

Setup

  1. Insert the 5mm drill bit into a drill chuck, ensuring a firm grip using the non-slip shank.
  2. Select the appropriate speed setting on your drill based on the material (slower for harder materials).
  3. Ensure the workpiece is securely clamped to prevent movement during drilling.

Compatibility

  • Drill Types: Compatible with most standard drills (corded and cordless) that accept a 5mm bit.
  • Materials: Specifically designed for use with bronze, cast iron, metal, stainless steel, and steel.

Care

  • Cooling: Use cutting oil or coolant when drilling into hard metals to reduce heat and extend bit life.
  • Pressure: Apply steady, even pressure; avoid forcing the bit.
  • Storage: Store the drill bit in a dry place to prevent corrosion.
  • Inspection: Regularly inspect the bit for wear or damage. Replace it when the cutting edges become dull.

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