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Kreg jig screw length

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Forum topic by Southeast posted 03-08-2017 09:42 PM 617 views 0 times favorited 13 replies Add to Favorites Watch
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Southeast

7 posts in 284 days


03-08-2017 09:42 PM

Good morning, I apologize in advance for the simple question however I am brand-new to woodworking so please go easy on me.

I am curious with the Kreg jig, when joining 2 boards, when you screw in the screws at an angle how do you determine the length of the screw so it does not protrude from the other side of the word?

Thanks! Mike


13 replies so far

View Bobmedic's profile

Bobmedic

375 posts in 2642 days


#1 posted 03-08-2017 09:51 PM

View JRsgarage's profile

JRsgarage

228 posts in 349 days


#2 posted 03-08-2017 10:23 PM

nice chart to use as reference, but always test out on a few pieces of scrap

-- Two is One, One is None

View Southeast's profile

Southeast

7 posts in 284 days


#3 posted 03-08-2017 10:52 PM

Thank you!

View tomsteve's profile

tomsteve

667 posts in 1059 days


#4 posted 03-09-2017 03:37 PM

as JR said, always best to test on scrap first.
and important not to overtighten the screws- just want em to pull the 2 pieces together.

View MT_Stringer's profile

MT_Stringer

3116 posts in 3071 days


#5 posted 03-09-2017 04:03 PM

@Bobmedic – I like that calculator. Sometimes I veer off the beaten path, and when I do, I just wing it with my best guess at screw length and settings on the jig and drill bit…and practice on a test piece.

-- Handcrafted by Mike Henderson - Channelview, Texas

View Bobmedic's profile

Bobmedic

375 posts in 2642 days


#6 posted 03-09-2017 04:14 PM



@Bobmedic – I like that calculator. Sometimes I veer off the beaten path, and when I do, I just wing it with my best guess at screw length and settings on the jig and drill bit…and practice on a test piece.

- MT_Stringer


I don’t use the calculator. I usually always work with the same dimensions so I have them memorized. That calculator was made by a guy on the Kreg Jig forum and I thought I’d pass it along. In fact, I rarely use pocket holes anymore in my work. I use them for Jigs and stuff or on hidden pieces that don’t matter. I primarily use dominos for most all my joinery. Before getting the Domino though, I used them a lot.

View Southeast's profile

Southeast

7 posts in 284 days


#7 posted 03-09-2017 04:36 PM

Thank you, not sure what domino joinery is but I will definitely check it out

View dday's profile

dday

129 posts in 1269 days


#8 posted 03-09-2017 05:11 PM



as JR said, always best to test on scrap first.
and important not to overtighten the screws- just want em to pull the 2 pieces together.

- tomsteve

this.
I’ve done this a couple of times.. and it’s aggravating.

View MT_Stringer's profile

MT_Stringer

3116 posts in 3071 days


#9 posted 03-09-2017 09:45 PM

Here is another thought. Glue can be used but not always necessary. Sometimes I use it when making face frames and sometimes I don’t. After all, the frame will be attached to the carcass with glue so it really doesn’t matter. Still comes out strong.

I screwed up once while making a frame for a cabinet with multiple drawers. Dang if I didn’t put one of the rails in the wrong spot. Thankfully, I wasn’t using glue that day so it was easy to remove the screws and re-position the rail. WHEW! Save me from having to make another frame.

-- Handcrafted by Mike Henderson - Channelview, Texas

View corelz125's profile

corelz125

314 posts in 816 days


#10 posted 03-09-2017 11:49 PM

View Ripper70's profile

Ripper70

619 posts in 748 days


#11 posted 03-10-2017 12:06 AM

Another thing to consider is that plywood is not actually true to it’s dimensional size. For instance, 3/4” plywood is actually closer to 11/16” thick. You can compensate for this by slightly adjusting the stop collar on the drill bit to shorten it so the screw doesn’t protrude through the other piece.

-- "You know, I'm such a great driver, it's incomprehensible that they took my license away." --Vince Ricardo

View robscastle's profile

robscastle

4544 posts in 2044 days


#12 posted 03-10-2017 12:50 AM

The calculator works, or at the very least it refelects what I have done.

I just finished attaching a table top using pocket holes with the jig and after a test run used 2.5” screws

BTW Mike dont forget to complete your home page, add your home details and a personalised picture , just so I dont think you are a gypsy.

-- Regards Robert

View Southeast's profile

Southeast

7 posts in 284 days


#13 posted 03-10-2017 02:21 AM

I will..I did not realize that was part of it. Thank you for all of the feedback…it was very helpful

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