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Drill Bits

Drill Bits

Drill bits, the most important part of any drill machine is used to bore cylindrical holes in different materials like metal, wood, plastics, etc. As per your requirement you can make the choice of drill bits If you are looking for a few quick useful tools a set of steel twisted bits and a few masonry bits would be enough but if you are working on the floor then you would require bits which are larger and or designed for a specific purpose/material.

We come across many types of drill bits designed for a specific purpose. One such drill bits is the steel twist bits. The twist bits can be used for wood, plastic and similar material and are also useful while drilling metal sheets. The twist steel bits are mostly made up of either High Speed Steel or Carbon Steel. Both the drill bits serve a different purpose like the carbon Steel Drill Bit is used for drilling wood and not metal. The steel twisted bits coated with Titanium Nitride (TiN) are also available. These drill bits exhibits a typical gold like color. This coating provides the drill bit more hardness and also a self-lubricating property. This bit should only be used for drilling metal and not any other material. As these bits are thin and brittle Special care should be taken when using the smallest. Always hold the drill square to the work and apply only light pressure when drilling.

You can use a drill sharpener, a grindstone jig or an oilstone to do this for sharpening the blades. Sharpening the blades or drilling areas regularly keeps the bits in shape and hence is cost effective. But while sharpening the twist drill bits Special care should be taken as titanium nitride coating can be destroyed. By forming a correct angle at the tip while drilling you can extend the life of the of your drill bit.

There are a variety of drill bits for different purposes. Some of them we can enlist here to give you a broad idea. The types of drill bits are:

Metal Drills

Ejector Drill

Core Drill

Left-hand bit

Countersink bit

Indexable drill

Spade Drill

Trepan

Twist drill

Gun drill

Center drill

Wood Drills

Lip and spur drill

Spade bit

Brace drill bit

Auger bit

Gimlet bit

Step bit

Forstner bit

Hinge sinker bit

Adjustable Wood Bit

Other Materials

Diamond core bit

Masonry drill

Hole saw

PCB through-hole drill

Installer bit

About the Author

Looking for more information on Drill Bits check out www.drill-bits.biz your guide to Drill Bits.

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Does a 'Travel-time' map exist on the web?

There are many websites around that provide a best route and the approximate duration of your journey by car between 2 locations but I'm looking for a site that would draw a perimiter around your journey starting point representing the distance of travel possible within a set period of time. Does any such website exist?

A bit like this, but this is for rail travel: http://www.mysociety.org/2006/travel-time-maps/index.php#nationalrail

This may help.
Have a browse to see what you think :-

http://www.cartographica.com/article.php?story=20060530123616688

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