There are many varieties of countersinks which one could enjoy from the myriad of choices available in the market. The single piece option is available in 2 forms:
a) A fluted version with a short shank
b) The elongated cylinder version with a conical tip
The cross-hole countersink is a single piece version without flutes. It uses a hole bored through an angled cone instead of cutting edges. When the bit spins, there is a trailing edge to make the cut from the hole. This projects a very smooth cut in removing the material quickly. This tool is excellent in ejecting chips as it is drilling.
Choice for Process
A typical fluted countersink has four cutting edges found on the cone whereas the more common single piece option has an odd number; that is, one or five.
Fluted countersinks are readily available in the marketplace in various sizes to cut conical holes that are meant to fit in screws of different head dimensions. The process is quite simple for any DIY enthusiast to operate with some care. The pilot hole must be drilled first to fit the screw before countersinking the hole for a seat flush on the work surface using a flathead screw.
The most effective approach on using a countersink is to apply the one with a body diameter which is matching to the screw head. The wrong choice in size and shape may bring about undesired results that cause the project to go awry. The screw head must fit in properly with a tight seating without being swallowed in by an oversized hole or left awkward on the surface.
Cone-shaped countersinks could create 6 specific chamfer angles; namely, 60°, 82°, 90°, 100°, 110° and 120°. These are specifically designed to match the preferred screw head angle.
Quality countersinks are manufactured to satisfy the ISO standard to be applied in any application across the globe for any industry or domestic environment. Screws of ISO Standard are well recognized in North America with a preference for the Unified Thread Standard of 82°. However, it is possible for a consumer to want a 90° countersink as the 8° difference helps the screw head bottom makes a quicker contact on the surface material without the sides or top supported.
Conclusion
Common sense dictates the matching of screw to the preferred type of countersinks for the best job to be executed successfully.
Carbide Connection is a leading Countersink Supplier and also has a selection of HSS, 6 Flute D/E Chatterless Countersinks, and much more. Order online at carbideconnection.com
