If for any reason you are not thoroughly delighted with the EZ Match Bit & Screw Guide, I’ll gladly refund your purchase. It’s a simple, easy-to-use tool for quickly matching a drill bit to a wood screw – without having to know the size of either. I think you’ll find the EZ Match Bit & Screw Guide to be a great tool for avoiding the most common problems people have when drilling pilot holes and driving screws.īut I’ll let you decide that for yourself. Some believe that drilling tiny pilot holes allows the. 5/16 head times two equals 10, minus two equals 8. Gauge (Head diameter in sixteenths of an inch X 2 ) 2. The formula below can be used to calculate an estimate of the screw head sizes and the gauge. That’s why I created the EZ Match Bit & Screw Guide. The drill bit should be almost the same size as the screws center core, not the thread or spiral part. The imperial diameter (in 16th of an inch) of the screw head is twice the gauge (imperial). As much as I try to keep things organized…over time, my screws and bits become hopelessly jumbled. You might also end up stripping the head of the screw if you’re using a power driver.Ī drill bit chart can help…by showing you what size bit to use with a particular size screw…but this assumes you know the sizes of all the screws and bits you keep in your shop. If a pilot hole is too small, a screw can crack the board…or put up so much resistance that it’s impossible to twist in. If a pilot hole is too large, a screw can lose its grip…and spin freely in the hole. If you want to stick the screw tight in the hole then the drill bit size has to be equal to the screw shafts width minus the threads. Of course the real trick is making sure the pilot hole you drill is the right size for the screw you want to use. Drill a hole too large, and your screw, bolt, or pipe thread will be. There are two basic steps to the process drilling the hole with the correct drill bit size and then threading or tapping the hole. Standards organizations define sets of sizes that are. Creating a threaded hole is one of the most common machine shop tasks. Metric drill bit sizes define the diameter of the bit in terms of standard metric lengths. The case that holds them in an indexed order (by size), via a graduated series of holes, is called a drill index. I know it’s tempting drive wood screws without a pilot hole, but this lazy approach to woodworking can cause more problems than it’s worth. Metric drill set, 1.06.0 mm by 0.1 mm, jobber length.
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