Silverline 612120 Lip and Spur Drill Bits 3 mm Pack of 10

Product Information

A workpiece machined between centers can be safely removed from one process (perhaps turning in a lathe) and set up in a later process (perhaps a grinding operation) with a negligible loss in the co-axiality of features (usually total indicator reading (TIR) less than 0. They hold their hardness at much higher temperatures and are used to drill stainless steel and other hard materials. The last thing you want is excess friction and heat buildup, especially considering how nasty plastic fumes can be.

A fast spiral (high twist rate or "compact flute") drill bit is used in high feed rate applications under low spindle speeds, where removal of a large volume of chips is required. When the cutting edge is centered on the bit, the hole drilled will be small, and when the cutting edge is slid outwards, a larger hole is drilled. Well, our focus will be on the lip and spur drill units, and we hope that you learn something new by the end of this article. The main reason is these types of material will wear down your tip more quickly, rendering the bit much less effective against plastic.

First, you need to know how to open and shut the jaws, whereby you will hold the drill tightly in one hand via the main handle before turning both of them concurrently. Polycrystalline diamond (PCD) is among the hardest of all tool materials and is therefore extremely resistant to wear. You’ll also learn about drill bit angles and what size drill bit you need for various wall plugs and bolts. A specialist masonry drill bit is the best type of drill bit to use if you’re drilling into brick, block, concrete, natural or artificial stone.

The two fluted drill bit also has a tendency to grab on any protuberance (such as flash) which may occur in the product. This means these bits tend to bind in metal; given a workpiece of sufficient thinness, they have a tendency to punch through and leave the bit's cross-sectional geometry behind. The lip and spur bit is a useful tool that will drill holes into softer materials such as wood and plastic without ruining them.The pin and the lips of brad point drill bits should stay sharp because when they dull, exerting a little pressure on them breaks the tip. If you are satisfied with the first side, turn the drill bit 180 degrees and repeat the process on the other side. Steelex has proved to be a very tough brand as well as “clean cutting action” even in very hard species such as Hickory, Bloodwood, Padauk, Purple Heart and many more. The bits have an extremely fast cutting tool geometry: no point angle, combined with a large (considering the flat cutting edge) lip angle, causes the edges to take a very aggressive cut with relatively little point pressure.