This item may be available in a different size, colour, scent, version or platform. Click below to be directed to product options:
Extra-length, for deeper holes
118-degree conventional point angles, for general drilling applications
Round shanks, for use on a variety of tool-holding systems
Uncoated (bright), economical and useful with a wide range of drilling materials
High-speed steel (HSS), for use on a wide variety of materials
The Precision Twist 1290 jobber drill bit is a conventional point, general-purpose, round shank drill bit made of HSS with an uncoated finish. It is suitable for drilling to a depth up to 12 times the diameter of the drill. Good for portable or machine drilling. The shank diameter is the same as the drill size. It was designed for drilling holes into a wide variety of metals and synthetic materials.
The 1290 series has a type N flute form, with a regular helix angle of 21 to 34 degrees, have best performance drilling into steel or cast iron.The uncoated finish helps keep costs down, yet provides acceptable performance in most situations. The finish helps increase chip flow in soft materials. Spiral flutes act as a passageway for chip extraction from the hole and for coolant to enter the hole. Right-hand twist brings chips up and away from the cutting edge. The extra length allows for more freedom in being able to drill a wider variety of circumstances.
Drilling, or hole making, is the most common metalworking operation in the world. Twist drill bits are the most common type of drill bit used. Twist drill bits are commonly used to drill holes with hand-operated drills, standalone drill presses, or lathes. The flutes of the drill bit act a passageway for chip extraction from the hole and for coolant to enter the hole. These drill bits have a right-hand twist that brings chips up and away from the cutting edge. They are made to DIN 338 industry standards, which ensure that drill bits around the world conform to the same specifications.
Precision manufactures machine tools under the following brands: Precision Twist, Precision Dormer, and Union Butterfield. They have locations around the world, and provide tools adhering to ANSI, NAS, and DIN standards.
Precision Twist Drill
Most Helpful Customer Reviews
I was making a bookshelf from some nicely figured Country Maple. While friction fitting the shelves, one of them fell on the floor and actually split half way down the board. I was very vexed, as this shelf was one of the nicest in the project in terms of figure. I considered gluing it, but was concerned it would not work well. Instead, I decided to glue and dowel the shelf using six-inch dowels. I was concerned the bit might wander or make a sloppy hole, given its length, but it worked perfectly and the shelf was able to be salvaged. I drilled three holes about six inches deep and repaired the damaged board.
Did the job. Drilled out a broken tube in the dip stick hole of 350 Chevy block while in the car. Extra length made a nightmare an easy job.
I bought this for routing some extra long holes in a one piece bass and guitars and it serves its function completely well. Do not hesitate in getting this drill bit.
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