What are the main types of drill bits for metal, and when should I use each?

High-speed steel (HSS) bits are a common choice for general-purpose drilling in metal, wood, and plastic, offering a good balance of cost and performance. Cobalt drill bits are more heat-resistant, making them suitable for harder metals like stainless steel. For very hard materials or production drilling, carbide-tipped bits provide excellent durability and cutting speed. When selecting, consider the material hardness and desired hole precision.

What's the difference between jobber length and other drill bit lengths?

Jobber length drill bits, like the Hanson HSS series, are a standard, general-purpose length. They offer a good compromise between reach and rigidity. Shorter bits, such as screw machine length, are more rigid and reduce the risk of breakage, while longer bits, like extension or aircraft length, allow you to drill deeper holes. Choose the length based on the depth and accessibility of the hole you need to drill.

What are masonry drill bits and how do they differ from standard drill bits?

Masonry drill bits, such as the Vermont American Double Flute Masonry Bit, are designed for drilling into brick, concrete, stone, and other masonry materials. They typically feature a carbide tip that is much harder than standard steel bits, allowing them to withstand the abrasive nature of masonry. Also, they often have a double flute design to remove debris more efficiently. Standard drill bits are not suitable for masonry as they will quickly dull or break.

What is a step drill bit (Unibit) used for?

A step drill bit, sometimes called a Unibit, is designed to drill multiple hole sizes with a single bit. They are ideal for drilling clean, round holes in thin materials like sheet metal, plastic, and wood. The stepped design allows you to gradually increase the hole size, reducing the risk of snagging or damaging the material. Always use cutting oil when drilling metal with a step drill bit to prolong its life and improve the quality of the hole.

How do I choose the right size drill bit for tapping threads?

Selecting the correct drill bit size for tapping threads is crucial for creating strong, accurate threads. The drill bit size depends on the tap size and thread pitch. Use a tap drill chart to determine the correct drill bit size for your specific tap. It's generally better to err on the side of a slightly larger drill bit to avoid breaking the tap, especially when working with harder materials.

What is the significance of the point angle on a drill bit?

The point angle of a drill bit affects its performance and suitability for different materials. A 118-degree point angle, common on general-purpose HSS bits, is suitable for drilling steel, wood, and plastic. A sharper angle, like 135 degrees, is better for drilling harder materials like stainless steel and helps prevent the bit from wandering. Always verify the point angle is appropriate for the material you are drilling.

What can cause a drill bit to break, and how can I prevent it?

Drill bits can break due to a variety of factors, including using the wrong type of bit for the material, applying excessive pressure, overheating, or wobbling due to an improperly secured workpiece. To prevent breakage, use the correct type of drill bit for the material, apply steady and moderate pressure, use cutting fluid to reduce heat, and ensure the workpiece is securely clamped. Also, inspect your bits regularly for wear or damage.

What safety precautions should I take when using drill bits?

Always wear appropriate personal protective equipment (PPE) when using drill bits, including safety glasses to protect your eyes from flying debris. Secure the workpiece firmly to prevent it from spinning or moving. Avoid wearing loose clothing or jewelry that could get caught in the drill. If drilling metal, be aware that the bit and workpiece can become hot, so use caution and wear gloves if necessary. Always consult the tool and accessory's safety guidelines.

Search

Manufacturers [more]

Hanson | 80172 | NO 72 DRILL

Name: NO 72 DRILL
Brand: Hanson
SKU: 154138
Price: 2.87 USD
Availability: LimitedAvailability
Rating: 3 (1 reviews)

larger image

Specifications

Manufacturer: Hanson
Model Number: {manufacturers_part_number}
Product Name: No. 72 Drill Bit
Weight: 0.01 lbs (approximately 4.5 grams)

Key Features

Precision Drilling: Engineered to the specific No. 72 size, this drill bit creates extremely fine and accurate holes for specialized tasks.
Lightweight Construction: Weighing only 0.01 lbs, it ensures optimal control and minimizes user fatigue during intricate and delicate work.
Reliable Performance: Manufactured by Hanson, a trusted name in cutting tools, providing dependable operation and consistent results.

Applications

Electronics Work: Ideal for creating small pilot holes or precise openings in printed circuit boards (PCBs) and miniature electronic components.
Craft and Jewelry Making: Perfect for intricate projects requiring tiny, accurate holes, such as stringing beads, detailing ornaments, or fine wire work.
Model Building: Suitable for adding fine details, assembling small parts, and creating precise connections in scale models.
Micro-Drilling Tasks: Designed for any application demanding very small, accurate holes in various materials.

Benefits

Exceptional Accuracy: Achieve consistent, precise hole sizes, which prevents errors and material waste in critical, delicate projects.
Enhanced Control: The ultra-lightweight design (0.01 lbs) significantly improves handling, allowing for superior precision and intricate detailing.
Increased Efficiency: Its specific dimensions and quality construction facilitate clean and effective material removal, reducing the need for rework.
Dependable Results: Rely on the consistent quality of a Hanson product, ensuring fewer tool failures and predictable outcomes for all your precision tasks.

Other products
Hanson Homepage
Model: 154138
Shipping Weight: 0.01lbs
Manufacturers Part #: 80172
Manufactured by: Hanson
Also Known As: HAN80172, AHN-80172, HN80172

Usually In Stock
Usually ships in 24-48 hours
Manufacturer Direct

$2.87

Earn 1% Back On Every Purchase (Rewards Program)

We are Here To Help (Contact Us)

Write Review

This product was added to our catalog on Friday 12 September, 2014.

Search

Manufacturers [more]

Categories

Hanson | 80172 | NO 72 DRILL

Specifications

Key Features

Applications

Benefits

$2.87

Customer Service

Popular Manufacturers

Popular Categories