The general definition of the term “jobber” is “a person or company that buys from manufacturers and sells to retailers”, most commonly used in the 1850-1950 period. At that time, manufacturers were mostly producing general purpose “for the trade” drill bits, not using specialized machining applications to make specific lengths or designs like today. These drills, were of medium length and suitable for a wide variety of jobs, coining the term “jobber-length”, reflecting the same concept of terms like “general purpose” and “multipurpose”. Today, jobber drill refers to the length of the drill itself.
What is a Jobber Drill?
Today Jobber Drills are manufactured in a number of different style to tackle a number of different applications. Jobber Drills still remain the most commonly found type of drill bit. A jobber drill bit has a long length compared to its diameter. The length of the flute is between 8-12 or 9-14 times the diameter of the drill, depending on the drill specifications. For example, a 1/2″ diameter jobber drill will be able to drill a 4-1/2″ deep hole because it is 9 times the diameter in length. Jobber drills are measured using a number of different systems:
Fractional Sizes
Letter Sizes
Wire Gauge Sizes
Metric Sizes
The size and measurement system you choose will depend on the application for which the drill will be used.
Champion Cutting Tool Corp. developed the Brute Platinum product line to outperform costly cobalt drill bits. Brute Platinum drills are designed to penetrate faster and have more flexibility, leading to less breakage and a longer tool life. The Brute Platinum product line is the leader in heavy duty metal cutting.
Outperforming the Competition
Brute Platinum drills are engineered for high performance in the toughest materials and environments. Developed from a combination of high quality raw materials, specific geometries and surface treatments; Brute Platinum Drills provide the user with a consistent, predictable and repeatable high performance drilling experience. All Brute drills feature Champion’s exclusive NOMO (Nitride on Margins Only) surface treatment. The combination of all these aspects make Brute Platinum Drills the ultimate workhorse for any metal drilling application.
Proven to penetrate faster than cobalt drills, the XL5 Jobber Drills feature a precision ground 135° split point that eliminates the need for a pilot hole. The split point also prevents “walking” and has the ability to bite right into #300 & #400 series stainless steel.
Users state lower fatigue levels, less force is required to drill
Less breakage due to unique “toughness: hardness” ratio
Ability to flex when cobalt drills chip or snap
Straight Shank
Heavy Duty
High Speed Steel with Black & Bright Finish & NOMO® Surface Treatment
When using a tap it is important to start with the correct hole size. Check out the handy Tap/Drill chart for general guidelines for selecting the right size twist drill.
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