Drill bits are an integral part of any drill machine which is used to bore cylindrical holes in different materials like metal, wood, plastics, etc. The choice of a drill bit depends on your requirement. If you are looking at a few quick handy tools a set of steel twisted bits and a few masonry bits would be sufficient but if you are working on the floor then you would require bits which are larger and or designed for a specific purpose/material.
There are many types of drill bits designed for a specific purpose. For example the steel twist bits. The twist bits are useful while drilling metal sheets and can be used for wood, plastic and similar material. Most of the twist steel bits are made up of either High Speed Steel or Carbon Steel. Both drill bits serve a different purpose like the carbon steel drill bit is used for drilling wood and not metal. The steel twisted bits are also available coated with Titanium Nitride (TiN). These drill bits display a typical gold like color. This coating gives 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. Special care should be taken when using the smallest sizes since these bits are thin and brittle. Always hold the drill square to the work and apply only light pressure when drilling.
Sharpening the blades or drilling areas regularly keeps the bits in shape and hence is cost effective. You can use a drill sharpener, a grindstone jig or an oilstone to do this job. Moreover sharpening the twist drill bits the 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 many types 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
1.Twist drill
2.Gun drill
3.Center drill
4.Core drill
5.Left-hand bit
6.Countersink bit
7.Indexable drill
8.Spade Drill
9.Trepan
10.Ejector Drill
Wood Drills
?Lip and spur drill
?Spade bit
?Forstner bit
?Step bit
?Brace drill bit
?Auger bit
?Gimlet bit
?Hinge sinker bit
?Adjustable Wood Bit
Other Materials
?Diamond core bit
?Masonry drill
?Hole saw
?PCB through-hole drill
?Installer bit
Large bits
?Oil and Gas well drilling bits
Regards and bye for now.
Jayesh Bagde
www.cordless-drills.net
Drill Master Cordless Drill
For the fastest and most accurate drilling the drill press is what you should look for (though it is not portable still it serves a lot of purpose). Due to its versatility to complete numerous jobs the drill press has become an essential item on floor of any shop.
The working of a drill press is quite simple. A Drill Press uses a fixed drilling head positioned above moveable workbench. Throat capacity is important as it measures the size of the workable area. Drill Press throat capacity is the distance between the bit and the rear of the workbench. The size of a drill press is determined by the distance the drill bit is from the column, a 12" drill press would be capable of drilling a hole in the center of a 12" disk. Looking back at its history we find out that the Drill Press was originally designed as a metal-working tool, but is now commonly used to work with a variety of materials. One important part of the drill press is the keyed chuck, there are three holes around the chuck that the key fits into, to prevent a bit from slipping after tightening the bit move to the next hole and tighten again, then move to the third hole and tighten again. Accessories are available that allow the Drill Press to complete a wide array of day to day jobs. These include performing as sanding drums, rotary planners, hole saws and mortising equipment. The best part of the drill press is its torque which is incomparable with the portable counterpart. Another plus for the drill press is apart from its changing role as a sanding drum, it is absolutely designed for making holes. And you can count on it with closed eyes as it handles the job with precision with repeatable accuracy and control that's impossible to maintain with a portable tool.
The drill press has been modified to serve different purposes. The most common drill presses available in the market are Bench Top Drill Press (mount directly to a workbench or on their own stands. Their compact size makes bench-top models good choices for small shops), Floor Model Drill Press (usually have more powerful motors, more attachments/accessories and greater material handling capacities than bench-tops. The extra versatility makes floor models good choices for serious DIY and commercial shops), Radial Drill Press (have a movable spindle that can be adjusted to the work. This type of machine is convenient to use on large and heavy work or where many holes are to be drilled since the work does not have to be readjusted for each hole) and Portable Drill Press (yield the least power, but are convenient for small jobs and travel. For someone without a functioning wood shop, this tool can be necessary).
While operating on any mechanical tool like the drill press your first priority should be safety. Always abide these methods for complete safety while you work. Always wear eye protection while working on the floor. Run your drill press at correct cutting speeds. Use a vise or clamp for handling small material. Remove waste chips with a brush and never by hand. Slow down on the pressure applied as bit breaks through material. Never drill with too much pressure, if the bit is dull sharpen or replace it. If drill binds, shut off machine, turn chuck backwards by hand to free bit. When drilling deep holes withdraw drill to clear chips frequently. Remove drill chuck key immediately after using. Keep floor area around tool clear.
Anand has sinced written about articles on various topics from Movers, Travel and Leisure and Power Tools. Regards and bye for now.Jayesh Bagdewww.cordless-drills.net. Anand's top article generates over 27100 views. to your Favourites.