Tapcon® is a brand name of high quality concrete screws. The name was derived from its own definition - an anchor that "TAPs its own threads/grooves into CONcrete." The Tapcon® was patented in 1976 by ITW Buildex as the first masonry screw. Tapcon® concrete screws are self-tapping screws that are used to anchor a fixture into solid concrete, brick or block. This screw has alternating raised and lowered threads with diamond cut notches (sometimes referred to as Hi-Lo® threads). This Advanced Threadform Technology(TM) offers superior pull-out resistance and stability. These Hi-Lo® threads also allow for fast and complete dust removal, which permits the Tapcon® to consistently tap its own high quality threads. Concrete screws that are not Tapcon® brand work in a similar manner but are undeniably different from the original Tapcon®. No other screw performs as well as original Tapcons.
Tapcons can be used in solid concrete as well as in brick and block base material. Tapcon® concrete screws can be used in a variety of applications ranging from light duty to medium duty. Some common applications for Tapcons are attaching furring strips, wood headers or plywood to concrete; mounting a flat TV above a brick fireplace; fastening conduit straps and electrical boxes to a brick or block wall; installing sub-flooring to masonry floor...there is a seemingly endless list of uses for this versatile screw!
Dewalt 1 2 Drill
Tapcons are made from carbon steel with a special coating called Climaseal®. Climaseal® coating is applied in multiple stages using a dip-spin technology and provides extra corrosion resistance. All generic concrete screws are also blue in color, however the only similarity to the Climaseal® coating is the color. It is the Climaseal® coating that allows Tapcons to be used in ACQ treated lumber.
Tapcons are also available in 410 stainless steel with a Climashield(TM) coating. The Climashield(TM) coating is applied in a three coat, dip-spin process that further enhances this product's corrosion resistance.
Tapcons are available in two head styles: Slotted Hex Washer Head and Phillips Countersunk Flat Head.
Installation of a Tapcon® concrete screw is a simple process. Follow the steps below to install these concrete screws.
1. Using a hammer drill and a correctly sized carbide tipped masonry bit, drill a pilot hole 1/4" deeper than the screw will be embedded.
** Important note: Hole tolerance is critical when installing Tapcons. The 3/16" diameter Tapcon® requires a 5/32" bit, and the 1/4" diameter Tapcon® uses a 3/16" bit.
2. Next, clear the hole of all debris and insert the Tapcon® concrete screw through the hole in the fixture and into the hole in the base material.
3. With a standard drill, slowly drive the Tapcon® screw into the hole in the base material.
** Important note: Hex Head Tapcons require a 5/16" nut setter. The Phillips flat head Tapcon® requires a #2 bit tip for the 3/16" diameter screws and a #3 bit tip for the 1/4" diameter screws.
Even with its small size and ease of use, Tapcon® concrete screws still offer considerable holding values. It is important to remember that the holding power of any anchor is always dependent upon the quality and strength of the base material, depth of embedment and proper hole size. When comparing technical data for different manufacturers, it is important to determine what values are being given - ultimate load ratings or working load ratings. Either term is acceptable, but it is important that when comparing products equivalent values are used.
The holding values in the charts above are ultimate holding values for the list of embedments shown. A safety factor of 4:1 (or 25%) is generally accepted as a safe working load. For example, if the ultimate shear value for a 1/4" diameter Tapcon® with a 1-1/2" embedment in 4000 psi concrete is 1380 lb., then the safe working load for that screw is 345 lbs. It is also important to remember that this value is the holding value for one Tapcon® screw. If eight concrete screws will be used to fasten a fixture, the combined shear value would be 2,760 lbs. (345 lbs. X 8 screws).
Even though Tapcons are small in size and are easy to install, these concrete screws are still resourceful fasteners. They are available in both standard Climaseal® coated and stainless steel and are offered in two head styles in a variety of lengths to meet a wide range of requirements.
Special Price!!! DEWALT DW235G 7.8amp 1/2-Inch VSR Drill
Oct 18, 2011 07:30:59
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DEWALT DW235G 7.8amp 1/2-Inch VSR Drill Feature
- Helical-cut steel, heat-treated steel gears for long life and durability
- Metal gear housing for jobsite durability and increased reliability
- Two-finger, rubber trigger for increased comfort
- 360 degree side handle for greater control and versatility
- Included with drill: chuck key with holder and 360-degree side handle
DEWALT DW235G 7.8amp 1/2-Inch VSR Drill Overview
Versatile and easy to handle, the DEWALT DW235G 1/2-Inch VSR Drill delivers the power you need for all your home-improvement projects. Enjoy the drill's variable-speed control, convenient reversing switch, comfortable pistol grip, and auxiliary handle, so you can work smarter.
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 The VSR Drill has a powerful 7.8 amp motor, making it ideal for a wide range of tasks. View larger. |
 Dense copper windings help generate powerful motor rotation. View larger. |
With its powerful 7.8 amp motor, The DEWALT 1/2-Inch VSR Drill is capable of delivering speeds of 0 to 850 rpm. This translates to quick, versatile drilling and driving. At the heart of the DW235G's long-lasting performance is a set of heat-treated, helical-cut steel gears that provide extended tool life and exceptional durability.
Designed for Versatility and Durability
As versatile as it is powerful, the DW235G functions well for both steel and wood applications. When working with a spade bit in wood, the drill offers a 1-1/2-inch capacity, and with an auger bit in wood, it can handle a 1-1/8-inch bit. The drill can handle a 2-1/8-inch self-feed bit and a 3-1/2-inch hole saw in wood. It can also handle a 1/2-inch twist bit or a 2-inch hole saw in steel.
The DW235G's keyed 1/2-inch chuck grips the bit securely to prevent slippage, and metal gear housing provides added durability.
Built with Comfortable, Accurate Handling in Mind
Comfortable handling goes a long way toward ensuring accurate results. The DW235G is built with an ergonomic grip, and its two-finger rubber trigger makes power control easy. A 360-degree side handle gives you hand-position options for improved user comfort and better overall command of the drill. And it weighs an easy-to-manage 4.9 pounds, decreasing user fatigue after extended use.
The DWD235G 1/2-inch VSR Drill comes with a DEWALT warranty package that includes a three-year limited warranty, a one-year free service contract, and a 90-day money-back guarantee.
What's in the Box
DWD235G 1/2-Inch VSR Drill, 360-degree side handle, and chuck key with holder.
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