Funnel Head Screws

[BWS]

Really disappointed that I watched that, but now I know a #6 screw doesn’t hold as well as a #8. Sarcasm. 1-1/2” is too short for 3/4” stock in my opinion. Also, he didn’t use the clutch did he? Just let off the trigger when he felt like it? He stripped out the washer head Spax is one reason it didn’t hold as well as the GRK. Was the larger diameter GRK just as short? Rrrr.

I use 1 1/2" screws to limit the chance of bulging the plywood, happy to test again with 2". The Festool install driver is not an impact, it auto-stops when it reaches the torque that you define with the control wheel. In the process of making the video I did the test over a dozen times, the Spax never held as good at the GRK. With that said the Spax is still a good screw and self taps better than the GRK. All the screws were the same length, 1.5".

 

[BWS]

I just clicked on the Insta button to see his videos. The finish he's getting on the walnut for his cabinet is sensational!

Thank you, I am making an in depth video on how to get incredible results when finishing walnut.

 

[Packard]

Our go to assembly screws are;

pocket hole, face frame assembley and attachment to box, We use a Castle machine for the pockets

Spax MDF, hardwood screws, box assembly, the CNC drills the panel holes, we do not drill the member the screws are going in to.

Conformats, box assembly, the CNC drills the panel holes the member holes are drilled at the bench.

Install GRK.

I’d like to try the funnel heads to see if they pull the pieces together better due to the head shape.

Euro boxes are about 2% of our sales, the rest are faceframe.

Tom

I agree with the above.

To add structure to a joint, my vote goes to the Confirmats, which function to draw the panels together and also as a structural dowel.

Other screws are good for drawing a joint together, especially for gluing.

I use pocket hole screws for face frame joinery. I have tried biscuits, dowels, pocket hole screws and even saddle joints. The pocket hole screws are the best for joining corners of face frames in my opinion.

Confirmats require s special drill bit. Does the funnel head screw require one too? It looks like it should.

 

[Michael Kellough]

“Confirmats require s special drill bit. Does the funnel head screw require one too? It looks like it should.”

Not in ordinary plywood. Very impressive how the collar under the head carves a counter sink for the head. Not a full conical shaped counter sink but it removes enough wood for the full diameter head to compress the remaining wood resulting in a very clean flush fit without mushrooming, as seen in the close-up examples in Sedge’s video.