I am just trying to make a square with these 2x4's. I want them to be perfectly flat on the surface when I screw them together with no wobble. Every time I screw them together, the clamping force of the screws makes the boards go out of alignment and then the whole thing wobbles on the countertop. I have tried clamping the two sides together, and I get a good fit on all the boards and they seem perfect, but still when I screw them in, they change positions. I am also making sure my holes are 90 degrees to the plane using a drill guide. Idk what else to do and it's driving me nuts
you could glue them together and after its set drive the screw
>>2969839Drill pilot holes. Are you sure your countertop is flat?
>>2969839if your cuts are not totally straight it will give it some wobble, also you are using shitty pine with a wide grain, so your screws will move slightly and slide into the softer springwood rings without pilot holes.best thing is to clamp everything into position then drill & screw, you have clamps, shame they look like shit ones. that might be your problem.
>>2969858I've drilled pilot holes and clearance holes. the countertop is flat, or at least I can get the frame to be flat on it. It just gets out of alignment when I fully tighten the screws.>>2969859>clamp everything into position then drill & screw, you have clamps, shame they look like shit ones. that might be your problem.yeah I just tested them and the clamps don't hold tightly at all. I will replace them with better ones and see if that does the trick
>>2969856This. Just use glue, and no clamps while laying on a flat surface. After glue has dried, drill pilot holes and screw it down.I use this technique all the time.
>>2969839Pre drill holesHave better grip strength than the screw
>>2969839Pine will never behave that way, the wood itself is warped, the cuts aren't ever straight unless you have a really good saw that you've squared up yourself, the density isn't even so when the screw digs in it will shift. Just give it feet and call it a day.
>>2969861Great you can delete this shit thread now that you realized your problem is your Chinese grade clamos. Please don't ever post another
>>2969839Joint one face and one sideThen run the opposite face through your thicknesserThen trim the other roundover with your table saw.Then you'll have 4 flat straight boards.
>>2969839>2x4's>perfectly flatPick one (1)
>>2969839That's a recatangle.
>>2969888your country better have borders as stong as you gate keep clamp or youre gonna look silly.
