drilling into mdf!

[jco1385 5,000+ posts]

pressure of clamps > pressure of screw. or at least =

 

[bjfish11 5,000+ posts]

pressure of clamps > pressure of screw. or at least =

no one was comparing clamps and screws //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[jco1385 5,000+ posts]

//content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

i had it clamped up pert nice

 

[.::DuD3::. 10+ year member]

Thats what she said //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

I was just about to say that //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

 

[kovemaster559 5,000+ posts]

you dont need screws. use glue and clamp.maybe brads if you feel you should

 

[JL Audio 5,000+ posts]

Try some spax.. their self countersinking screws, i've seen someone on here use them in a build but I never could find any myself.

 

[CRXBMPN 5,000+ posts]

i use coarse thread 1 5/8" screws, the fine threads would strip the wood even when the clutch on my Ryobi drill was set to 3. Liquid Nails for the bond.

 

[stuckinok 5,000+ posts]

I dont care what anyone says I have found in my own box building that I need screws. Not alot but 1 every six inches. I dont have all day to sit there and let one side dry until I move on to the next. I would like for someone to show me proof that a box without screws is better them a properly built box with screws and I mean real proof not he say she say BS.

 

[jco1385 5,000+ posts]

I dont care what anyone says I have found in my own box building that I need screws. Not alot but 1 every six inches. I dont have all day to sit there and let one side dry until I move on to the next. I would like for someone to show me proof that a box without screws is better them a properly built box with screws and I mean real proof not he say she say BS.

no one ever said any was better than any other...//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

 

[SPY 5,000+ posts]

1-1/4" coarse thread drywall screws and a 3/32 countersink bit.

coarse thread seems to put pressure on the joints better than fine thread IMO...

 

[Ed Lester 10+ year member]

at just over 160dB on the dash and 175 in the box, I was measuring over 800 lbs of pressure on my back wall.

I used some of the strongest glues available and they will never hold without screws. Glue, screws, and some fiberglass still pulled apart once in a while.

So I developed techniquies in construction to hold it stronger.

In my experience. Screws hold the box together and the glue merely seals and reinforces.

 

[edzy 10+ year member]

Ive always used glue and finish nailer. Never had problems. However, in Eds Case, a box designed to hit 160, yes, you will need as much bond as possible. lastly, most ppl who are here looking for box advice are not 160 ppl. Just looking for a decent box.

And to the op, are you countersinking the heads? Ive always used 1/8 inch bit and course 1/58 drywall screws, before I got the nailer. Also, dont put screws less then 2" from any end.

 

[Vermithrax 10+ year member]

Another theory is regardless of the fastener type or clamps involved, too much clamping pressure merely squeezes the majority of the glue out of the joint rendering the glue joint weak, therefore the fasteners would be needed to hold the joint together.

I've done screws, brads and clamps only. The screw method is the most costly and moderate time-wise, brads are the fastest and in the middle cost-wise, clamping is the cheapest but takes the longest, but if you have enough clamps you can assemble the whole box and let it dry as a unit, given it isn't an extremely complicated design.

 

[IgnoreMe 5,000+ posts]

i find good luck with either 1/8th" bits, but i have split it with that.

generally most people find best luck with 5/32th bits.