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diablo

09:50AM | 12/20/03
Member Since: 12/19/03
5 lifetime posts
Bvtools
Greetings!

I am a newbie to Woodworking. I am having a frustrating time using 4" deck screws with a power tool. When I try to use the screws on treated lumber, I keep stripping the heads of the screws. They are supposedly "ok" screws recommended by ***** - "Griprite" brand. I have tried changing the speed/torque on my power tool and no luck.

It is very frustrating and I have even tried different size philips screw heads with no luck. I even tried predrilling a hole for the screw - no luck! HELP!!!

I know I am doing something wrong. Any feedback, suggestions or advise will be greatly appreciated.

Thank you.

Altereagle

01:00PM | 12/20/03
Member Since: 12/27/02
543 lifetime posts
4" whoa.. that seems a little long for decking screws even with 1 1/2 decking.

You must be using ipe (iron wood) if you're finding that much of a prob, but anyway.. look for what's called a countersink bore it'll be a drill bit which will match the screws head & shank and also make sure it matches the gauge of the screw like a #12 gauge 2 1/2 stainless... which in hardwood needs a 1/8 pilot.
http://www.bitsnbores.com/html/screw_sizes.html

Alter Eagle Construction & Design

hammerman

06:09AM | 12/24/03
Member Since: 07/02/03
30 lifetime posts
After predrilling, try putting some liquid soap on the screw. This will make it tighten a little easier. Also, you may want to try one of those square head screws. You'll need to buy a special square bit for them, but you wont stip those.

just my 2 cents

hoganem

04:09AM | 12/26/03
Member Since: 02/13/03
90 lifetime posts
Since nobody mentioned it I will....

I have better luck on decks with square (Roberts) bits. They don't strip as easily as standard phillips. Replace the bits regularly, they are cheap, because the square bits do strip over time as well. Use plenty of downforce on your driver drill to keep the bit in the screw tight.

I have tried the combination of square and phillips, not sure who makes it, but it didn't work as good as standard square.

Also I used some special screws on one deck that was for composite decking, they were called SPAX screws and used a Torx bit. They worked great, but were expensive and the composite is soft anyway.

Piffin

01:45PM | 12/27/03
Member Since: 11/06/02
1281 lifetime posts
I use either the square drive screws or the Torx head ones from GRK Canada

diablo

05:33AM | 01/01/04
Member Since: 12/19/03
5 lifetime posts
Happy New Year Everyone!

Thank you for your Excellent suggestions.

Altereagle
----------

In regards to 4" screws, I was working with a stair stringer and needed to drive a 2 x 4" (width) into the stringer (9.5" width) and figured that a longer screw would be better. Did try the countersink bits without much luck. Looking back, perhaps, a lag screw would have been a wiser option. The link you sent has been educational. Because of the pixs, I can now see and relate to what is available for what.

Hammerman
---------

Liquid soap! Got to try this one. When we say square head, that is different from Torx which seems to have a "star" shaped head...? Correct? I take it that they are for exterior usage? Thank you.

Hoganman
--------

Is the square bit you are referring to similar to the one Hammerman is referring to? Is composite also what they call MDF? Thank you.

************
Here are other things I tried with the results:

1. Used electric 1/2" 800rpm power drill with manual chuck and side handle - same results with existing screws. Better results with more expensive Philips (Mustard colored exterior) screws though the ***** store did not carry 4" and had to use 3".

2. Used a boring bit (1/4") to create a "countersink" hole wide enough to let my extended screw holder attachment with the screw slide in and then applied sufficient downward force. Decent results thus far... cannot understand why it worked...but, desperation sometimes leads to "creative" solutions.

Thank you.


toolcen2

01:35PM | 01/01/04
Member Since: 09/10/03
67 lifetime posts
IN MOST CASES, IF YOU ARE USING A CORDLESS DRILL, THIS IS THE INCORRECT TOOL FOR DRIVING DECKING SCREWS. YOU NEED TO CHANGE TO A DECKING GUN WHICH TURNS FASTER RPMS. IF THIS IS A SMALL JOB, AND CAN"T INVEST, CHANGE THE SCREWS TO A #2 SQUARE HEAD,WHICH IS COMMONLY CALLED A ROBINSON SCREW. MAKE SURE THEY ARE A REGULAR DECK SCREW FOR THIS PURPOSE. I AGREE, I FEEL YOU ARE USING WAY MUCH SCREW FOR YOUR JOB
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