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The design and shape of cordless power tools makes then fit into areas where corded power tools will not. In many cases, this leads to a sacrifice of turning strength from the motor. Dewalt power tools makes larger voltage cordless power tools to deliver more power for your job. Dewalt cordless power tools are the ones most often selected by professionals. Their dependability and ability to perform heavier work than most of the other lines of cordless tools is the reason for this. When doing repetitive work like hanging sheet rock, drill bits for driving the screws holding the sheet rock in place, tend to wear out and need replacement often. The quick-change heads of Dewalt power tools make this an easy task to accomplish with minimum slowing of the work being performed. Dewalt power tools offers a nice line of cordless screwdrivers and variable speed drills. The power ratings range from 7.2-volt motors up to 24-volt motors delivering the type of power you need. A variable speed drill is used to make a variety of different size holes from very tiny ones used to enable nails and screws to be driven without splitting the wood to large ones used for installing door knob assemblies. When using a variable speed drill, start your drilling slowly to allow the bit time enough to get firmly seated in the hole. This will lessen the chance of the bit jumping when higher speeds are applied which might cause you to drill something you did not want to have drilled. Dewalt power tools offer a full range of both corded and cordless tools. Their durability and easy ability to change accessories makes them highly desired for professionals. Dewalt power tools deliver in work conditions where other power tools fail. The only drawback I can see to this magnificent line of cordless tools is their weight. Having larger voltages to deliver more power means larger battery packs and larger motors as well. If you have to use one of these heavy cordless power tools all day, you will feel like you have done an intensive workout. Because this is a superior product, you can expect to pay a superior price for it as well. While you will see sales for the combo packs available in store ads, you may notice that these are the lighter weight tools. They will perform the work desired in most situation, but for the really heavy duty applications the heavy duty power tools will command a heavy duty price tag. Cleaning & Finishing Metal Castings In The Hobby Workshop Colin Croucher Every metal casting you produce will require some kind of finishing operation before it becomes a useful, serviceable casting. Finishing of castings can be a laborious job if carried out entirely by hand, luckily for the home metal craftsman or woman (yes. there are a few women who are involved with metal casting) there are a number of very handy tools which can be used to great effect to remove flashings, fins, sprues, risers & dags, which remain after the casting operation. The number one tool in the workshop is a reliable 4 angle grinder, they can be fitted with a coarse-grained resinoid grinding wheel which are known to remove aluminium, bronze or brass metal at a rapid rate with out clogging up. The 4 angle grinder will also eccept an abrasive metal cut-off wheel, which is used to cut off the sprues and risers from bronze or aluminium castings. The big 9 angle grinders can also be used to cut & grind any large size castings. Angle grinders big & small can also be fitted with the abrasive flap type wheel which are a multi layered grit wheel. Flap wheel finishing will give a very smooth lustrous finish on any type of metal, good quality flap wheels can be expensive to buy,they remove metal quickly and will last quite a long time, so they are worth the money. Another machine metal finishing worth the expense, is the beltlinishing tool, of which there are several different brands available. They are supplied with belts ranging from coarse to fine, a handy feature of the machine is the ability to carry out a quick belt change. Finishing and preparation of a number of castings can be done in a very short time using this type of machine, the linishing machine is attached to a one horsepower bench grinder, and once you install and use one; you will wonder how you ever did without it. They are expensive to buy, but as you do more & more castings, you will need a faster & better finishing system for your castings. A very handy linishing belt is the scotch brite belt, this belt will give a beautiful finish on any type of metal, cast or other wise. Now, we are not advocating for you to rush out tomorrow to spend a sqillion on new tools, as quite a bit of excellent finishing can be achieved with normal hand tools.There is not much sense in spending a large amount of money if you don't have a great need.But you'll know when it's time to buy some good power tools, ifyou don't already own some. And of course, once you finish with all of the initial grindingand cleaning, you may want to give the item a high polish.A calico cloth buffing wheel mounted on your bench grinder,and some special buffing compound will put a mirror finish onyour unique casting creation. And don't forget to also buy and wear a pair of eye safety goggles, or wear a full face shield, plus a pair of thick leather gloves to protect your hands & fingers. Resinoid and abrasive cut off wheels throw a huge amount of hot particles of sharp splinter shaped metal...which could inflict VERY serious injury to your eyes and skin. Metal craft hobbies can provide a lot of enjoyment but you need to be careful at the same time. Col Croucher. http://www.ezinearticles.com/?Cleaning-and-Finishing-Metal-Castings-In-The-Hobby-Workshop&id=85752 | ||||||||||||||||||||
