I recently built my first workbench and I've been running into a frustrating problem where my drill bits just aren't long enough for the pilot holes I need. For any screws longer than 3 inches, it feels like the only option is to buy some 12-inch extension drill bits online, which aren't always the best quality. Just the other day, while drilling pilot holes for 3" wood screws, my DeWalt bit broke because I had it clamped too close to the chuck due to its short length compared to the screws. So, I'm wondering why drill bits tend to be so short. Shouldn't pilot holes match the length of the screws? Also, where can I find a set of longer drill bits that aren't going to empty my wallet? I also think I should look into brad point bits. I admit the broken bit was probably user error, but are there better quality bits than DeWalt that are still affordable? Thanks!
3 Answers
You actually don’t need to drill a pilot hole the entire length of your screws. Just enough depth so the wood doesn’t split or crack when you drive in the screw. For lag bolts, you want to think about using spade bits since they work great for deeper holes. Also, if you need longer drill bits, check out McMaster Carr for some good options.
Basically, you only need your pilot hole to be the thickness of the wood minus the screw length. So, if you’re using 2x4s (which are actually about 1.5 inches thick), you'd only need to drill about 1.5 inches deep for a 3-inch screw. Just remember, if you're drilling into two pieces of wood, they often don’t need a deep pilot hole at all, unless you're dealing with hardwood furniture.
Oh, I think I see! So just a shallow hole is usually fine? That's super helpful.
The need for pilot holes really depends on the type of wood you’re using. For softwoods like 2x4s, you don’t have to be super precise with your pilot holes. However, for hardwoods, pilot holes help prevent cracking. As for drill bits, I recommend getting longer bits for larger projects, and you can easily find affordable options at local hardware stores or online.
Thanks! I’ll check my local store and see what they have.
Got it! Thanks for the tip.