Exсluѕіvе Precision Twist QC1290P High Speed Steel Extra Long Length Drill Bit, Uncoated (Bright) Finish, Round Shank, Parabolic Flute, 135 Degree Point Angle, 15/32"
Customer reviews Precision Twist QC1290P High Speed Steel Extra Long Length Drill Bit, Uncoated (Bright) Finish, Round Shank, Parabolic Flute, 135 Degree Point Angle, 15/32
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| Material | High Speed Steel |
| Cutting Diameter | 0.47 Inches |
| Finish Type | Uncoated |
| Shank Type | Round |
| Cutting Angle String | 135 Degrees |
- Parabolic flute design offers enhanced chip removal, coolant flow to the drill point and heat dissipation
- Extra-length drill bits have longer flutes and overall lengths than jobber drill bits, for deeper holes
- 135-degree radius spilt point, is self-centering, reduces walking, good for hard material, and reduces pressure on cutting edges
- Uncoated (bright), economical and useful with a wide range of drilling materials
- High-speed steel (HSS), for use on a wide variety of materials
From the manufacturer
 |  |  |  |  |  | |
|---|---|---|---|---|---|---|
| 0860 HSS Drill | 1290 HSS Drill | 1511 HSS Drill | 1813 HSS Drill | QC0860P HSS Parabolic Drill | QC1290P HSS Parabolic Drill | |
| Material | HSS | HSS | HSS | HSS | HSS | HSS |
| Coating | Uncoated (Bright) | Uncoated (Bright) | Uncoated (Bright) | Uncoated (Bright) | Uncoated (Bright) | Uncoated (Bright) |
| Point | 118 Degree | 118 Degree | 118 Degree | 118 Degree | 135 Degree | 135 Degree |
| Length | 8" Overall | 12" Overall | 15" Overall | 18" Overall | 8" Overall | 12" Overall |
| Length | 12XD | 12XD | 15XD | 15XD | 10XD | 10XD |
Product Description
The Precision Twist QC1290P extra-length drill bit is a wide land parabolic flute design, 135-degree radius split point, round shank drill bit made of HSS with an uncoated (bright) finish. It is suitable for drilling to a depth up to ten 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 with best performance in steel and cast iron.
The QC1290P series has a wide land parabolic flute design that enhances chip formation and evacuation of chips (also called swarf). Coolant has a better flow to the drill point for heat dissipation, and higher speeds and feeds for increased productivity. It is recommended with this design to use a constant heavy feed rate while drilling. This design has a reinforced web which provides increased drill strength and rigidity, and straighter closer tolerance holes. It has an uncoated (bright) finish which helps keep costs down, yet provides acceptable performance in most situations. The finish helpd increase chip flow in soft materials.
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 ANSI (fractional sizing) industry standards, which help ensure that drill bits around the world conform to the same specifications.
Dormer Pramet manufactures cutting tools under the following brands: Precision Twist Drill, Dormer, Union Butterfield and Pramet. The company has locations around the world, and provides tools adhering to ANSI, NAS, and DIN standards.
Product Specifications
Specification for this product family
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