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Jobber Drills
technical specification
The Jobber Drill are manufactured in different style to tackle a number of different applications.
This drill bit has a long length compared to its diameter. Normally the length of this drill is between 8-12 or 9-14 times the diameter of the drill, depending on the drill specifications.
Jobber drills are the most widely used type of drill in industry for drilling cylindrical holes.
Generally they come with two spiral flutes, straight (or parallel) shanks and an overall length which varies with diameter.
There are a number of variations in tool geometry, material specifications and coatings which help to optimize performance and tool life in specific applications. High speed steel drills are appropriate to most materials including steel, non-ferrous metals, plastic and wood. Carbide drills may be necessary for extremely hard materials, high temperature alloys etc. For best results always use recommended speeds, feeds and lubricants.