Torx drives have different numbers based upon the different distances between two opposing points. The Torx drive is sometimes referred to as a star drive due to the resemblance it has with its 6-point star shape. Torx drives are designed to function at higher torques than other screwdriver types and also have a longer lifespan. Phillips screwdrivers can be used on many different cruciform screws. Phillips drives have become a very popular drive when it comes to precision work, that’s why it is used in electronics and laptops. The Phillips screwdriver has become the standard in many different countries. Robertson drives have corresponding color codes to make each size easy to identify. Like the Phillips screwdrivers, Robertson drives also make use of a numbering system. The Robertson drive is commonly referred to as a square drive and is very popular in both electrical and construction fields. Measurements for the sizes of hex keys are done across the flat parts of the hex. These hex keys are sometimes referred to as Allen wrenches and these screwdrivers usually come in an L-shaped key with no handle. These screwdrivers are the easiest to recognize because of its wedge-shaped end. Flat Head Screwdriver SizesĪ flat head screwdriver is also sometimes referred to as a slotted screwdriver. To tap a 3/16 Tapcon, use a 5/32 bit, 1/4 Tapcon, 3/8 Tapcon, 1/2 Tapcon, and 3/4 Tapcon, use 3/16 diameter bits, To tap 3/8. The Tapcon diameter determines the bit diameter. But how do you know when you have all the necessary sizes?īelow you will find the 5 most common screw head shapes with the various sizes available. All Tapcon screw bits must fulfill ANSI B212.15-1994 specifications, have a carbide tip, and be used in a hammer drill set to hammer and rotation. Getting a set that has the sizes you need most can often be more important than buying a “full set” that lacks one or two vital sizes. Have you ever looked at a screwdriver setand thought “There are more sizes than I’ll ever need” only to read reviews and find out they’re incomplete? It is thus better to buy the sizes that you need most rather than to buy a full set that you later find is incomplete. (If the fit seems tight, try passing one side of the lag across a bar of soap prior to installing it.A full screwdriver set might seem like it has far more sizes than you will ever need, but then there comes a day where you realize that your screwdriver set is missing a size that you desperately need. I usually use a ratchet and socket to get a little exercise. If you’re following directions or a woodworking plan, it may tell you what size drill bit to use. I draw the line at three, but a good powerful driver might be handy for actually installing the lag once the hole is ready. This is, of course, most efficiently accomplished with three different drills when multiple holes are needed to avoid the years wasted changing the drill bits back and forth. The diameter of this third hole matches the shank only and not the threads, allowing the threads to cut their way into the wood. This third depth is usually 1/4" to 1/2" shorter than the threaded portion of the lag bolt shank, depending on the size you are dealing with. The third time down the hole is with a twist drill bit again marked with tape at a point to match the threaded portion of the lag up to and NOT INCLUDING the tapered point. Next I'll drill a hole sized to match the unthreaded shank portion of the lag bolt, wrapping the twist drill bit with masking tape at the proper depth after measuring the unthreaded shank length of the lag. Usually using a spade bit, I drill the first hole by the hairy eyeball method estimating the thickness of the lag bolt hex head plus the washer. I find I usually recess the head into the lumber that I'm assembling, so I size the first drill bit to the washer I'm using under the head of the lag bolt. Lots of us are doing construction along with the finer crafts. Another 2 cents worth = Lag bolts are usually for larger scale projects, but are a great fastener if used properly. Yep! I do the eyeball to shank method and find it just fine.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |