How to Choose the Jobber Drill Bits
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Table Of Contents
- 1. What are Jobber Drill Bits?
- 2. Features of jobber drill bits
- 2.1. Length:
- 2.2. Material:
- 2.3. Point Angle:
- 2.4. Shank:
- 2.5. Flutes:
- 3. Types of Jobber Drill Bits
- 3.1. High-Speed Steel (HSS) Jobber Drill Bits:
- 3.2. Cobalt Jobber Drill Bits:
- 3.3. Titanium-Coated Jobber Drill Bits:
- 3.4. Carbide-Tipped Jobber Drill Bits:
- 3.5. Black Oxide-Coated Jobber Drill Bits:
- 3.6. Split Point Jobber Drill Bits:
- 3.7. Long Series Jobber Drill Bits:
- 3.8. Extra Length Jobber Drill Bits:
- 4. Benefits of Jobber Drill Bits
- 4.1. Versatility:
- 4.2. Standard Length:
- 4.3. Ease of Use:
- 4.4. Wide Range of Materials:
- 4.5. Affordability:
- 4.6. High-Speed Steel (HSS) Durability:
- 4.7. Various Coating Options:
- 4.8. Standard Point Angles:
- 4.9. Accessibility:
- 4.10. Split Point Design:
- 5. How to choose Jobber Drill Bits?
- 5.1. Material Compatibility:
- 5.2. Bit Material:
- 5.3. Coating Type:
- 5.4. Drill Bit Size:
- 5.5. Point Angle:
- 5.6. Flute Design:
- 5.7. Special Features:
- 5.8. Durability and Longevity:
- 5.9. Application:
- 5.10. Budget:
- 5.11. Brand Reputation:
- 6. In conclusion
What are Jobber Drill Bits?
Jobber drill bits are a type of twist drill bit commonly used in metalworking and general-purpose drilling applications. These bits are designed for drilling into various materials, including metal, wood, plastic, and other substrates. The term "jobber" refers to the standard length of these drill bits, which falls between short screw machine length and longer taper length drill bits.
Features of jobber drill bits
Here are some key features of jobber drill bits:
Length:
- Jobber drill bits typically have a length that is longer than short or stubby bits but shorter than taper bits. The standard length makes them versatile for a variety of applications.
Material:
- Jobber drill bits are made from various materials, including high-speed steel (HSS) and cobalt. High-speed steel is suitable for general-purpose drilling, while cobalt bits are more durable and can withstand higher temperatures, making them suitable for drilling hard materials like stainless steel.
Point Angle:
- The point angle of jobber drill bits is usually around 118 degrees, which is a common standard for general-purpose drilling in a variety of materials.
Shank:
- The shank of jobber drill bits is cylindrical and often has a reduced shank diameter for use in smaller drill chucks.
Flutes:
- Jobber drill bits typically have two or four flutes, which are the helical grooves along the length of the bit. Flutes help to remove chips and debris from the hole as the bit rotates.
Types of Jobber Drill Bits
The most common types include:
High-Speed Steel (HSS) Jobber Drill Bits:
- These are general-purpose drill bits suitable for drilling into materials like wood, plastic, and soft metals.
- They are made of high-speed steel, providing good durability and heat resistance.
Cobalt Jobber Drill Bits:
- Cobalt drill bits are made of a steel alloy that includes cobalt. This makes them more heat-resistant and harder than standard HSS bits.
- Cobalt bits are suitable for drilling hard materials such as stainless steel and cast iron.
Titanium-Coated Jobber Drill Bits:
- Titanium coating increases the hardness of the drill bit, reducing friction and heat during drilling.
- These bits are suitable for drilling into harder materials and provide extended tool life.
Carbide-Tipped Jobber Drill Bits:
- Carbide-tipped bits have a cutting edge made of carbide, a very hard and durable material.
- These bits are ideal for drilling into hard materials like concrete, masonry, and tiles.
Black Oxide-Coated Jobber Drill Bits:
- Black oxide coating provides increased corrosion resistance and reduced friction.
- These bits are commonly used for drilling into softer materials like wood and plastic.
Split Point Jobber Drill Bits:
- Split point bits have a self-centering design, which helps prevent the bit from wandering as it starts drilling.
- These are often used for precision drilling applications.
Long Series Jobber Drill Bits:
- Long series bits have an extended length compared to standard jobber bits.
- They are suitable for drilling deeper holes and reaching areas that are harder to access.
Extra Length Jobber Drill Bits:
- These bits have an overall longer length, providing extended reach for specific drilling requirements.
Benefits of Jobber Drill Bits
Versatility:
- Jobber drill bits are designed for general-purpose drilling, making them versatile for use in a wide range of materials, including wood, metal, plastic, and composites.
Standard Length:
- The standard length of jobber drill bits makes them suitable for many applications, striking a balance between shorter and longer bits. This makes them well-suited for general drilling tasks.
Ease of Use:
- Jobber drill bits are easy to use and are compatible with a variety of drill types and chucks. Their standard length allows for convenient handling and control during drilling.
Wide Range of Materials:
- They can drill into different materials, including soft and hard metals, wood, plastics, and more. This versatility makes them a go-to choice in various industries.
Affordability:
- Jobber drill bits are often more affordable compared to specialized drill bits designed for specific materials. This makes them a cost-effective option for many users.
High-Speed Steel (HSS) Durability:
- Many jobber drill bits are made from high-speed steel (HSS), providing good durability and resistance to wear. This makes them suitable for repetitive drilling tasks.
Various Coating Options:
- Jobber drill bits are available with different coatings, such as titanium, black oxide, and cobalt, which can enhance their performance by improving hardness, reducing friction, and increasing resistance to corrosion.
Standard Point Angles:
- The standard point angle of jobber drill bits is typically around 118 degrees, which is suitable for a broad range of materials. This design contributes to their versatility and ease of use.
Accessibility:
- Jobber drill bits are readily available in various sizes and types at hardware stores and online retailers, making them easily accessible for users.
Split Point Design:
- Some jobber drill bits come with a split point design, allowing for precise and self-centering drilling, reducing the likelihood of wandering during the initial stages of drilling.
How to choose Jobber Drill Bits?
When selecting jobber drill bits, you should take some minutes to check our guides:
Material Compatibility:
- Identify the type of material you'll be drilling into (e.g., wood, metal, plastic, concrete) and choose a jobber drill bit that is suitable for that material. Different materials may require specialized coatings or materials for optimal performance.
Bit Material:
- Jobber drill bits are commonly made from high-speed steel (HSS), but there are also variations with coatings like cobalt, titanium, or carbide tips. Choose the material that aligns with the hardness of the material you're drilling.
Coating Type:
- Consider coated jobber drill bits for enhanced performance. For example, titanium coating reduces friction and increases hardness, while black oxide provides corrosion resistance. Cobalt-coated bits are suitable for drilling hard metals.
Drill Bit Size:
- Select the appropriate drill bit size for your specific application. The size is usually specified by the diameter of the bit. Make sure the chosen size matches the requirements of the hole you need to drill.
Point Angle:
- The standard point angle for jobber drill bits is typically around 118 degrees. This angle is suitable for a wide range of materials. However, for specific materials, like metals or plastics, you might consider different point angles for optimized performance.
Flute Design:
- The number of flutes can affect chip evacuation and the quality of the hole. Choose between two or four flutes based on the material and the desired finish of the hole.
Special Features:
- Some jobber drill bits come with special features like split points for improved centering and reduced wandering during drilling. Consider these features based on the precision requirements of your application.
Durability and Longevity:
- Consider the durability of the drill bit, especially if you anticipate heavy or frequent use. Cobalt bits or carbide-tipped bits, for example, tend to be more durable than standard HSS bits.
Application:
- Tailor your choice to the specific application. For example, if you are drilling into hard metals, a cobalt or carbide-tipped bit might be more suitable. For general-purpose tasks, standard HSS bits may suffice.
Budget:
- Consider your budget constraints. While specialized bits may offer certain advantages, standard HSS bits are often more affordable and can perform well in many applications.
Brand Reputation:
- Consider the reputation of the brand. Established brands often have a track record of producing reliable and high-quality drill bits.
In conclusion
Jobber drill bits are widely used in workshops, construction sites, and manufacturing facilities for tasks such as drilling holes for screws, bolts, and other fasteners.
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Jobber Drill Bits are one of the most popular and versatile types of drill bits available. Their unique design features a tapered tip that allows them to be used on a variety of materials, from wood to metal. This makes them ideal for tasks such as drilling holes for screws and nails, as well as boring holes for pipes and conduits. What's more, the tapered design also makes them suitable for a range of applications, from drilling holes for screws to boring holes for pipes.
