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How would you join this using pocket screws

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Forum topic by NeophyteGrant posted 02-05-2019 07:46 PM 770 views 0 times favorited 15 replies Add to Favorites Watch
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NeophyteGrant

121 posts in 1067 days


02-05-2019 07:46 PM

Topic tags/keywords: kreg pocket-hole 2x4 butt-joint joinery clamps clamping squares

I’m putting together a carcass for a cart, using milled 2×4s. Then I plan to just skin it with some brad-nailed on hardboard and call it a day. I wanted to make the frames and stringers using pocket-screws. I’m no stranger to some of the shifting that can happen with face frames, but what about doing these stringers, perpendicular to the frame.

How do you guys clamp these? Every way I do it with clamping squares seems inefficient and prone to movement when I’m driving the screw. It frustrates me when something so simple eats up time.


15 replies so far

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SMP

1443 posts in 464 days


#1 posted 02-05-2019 07:52 PM

I have one of these https://www.kregtool.com/store/c46/corner-clamps/p461/90-corner-clamp/
After using it , I would never try that joint again without it. The clamp is a bit buggy though, I keep the screws a bit loose and hold it tight until I lock it. But after getting the hang of it, its well worth it if you have to do this often.

View Davevand's profile

Davevand

134 posts in 1394 days


#2 posted 02-05-2019 07:56 PM

I would attach it just as you have it pictured. I use a clamp on the board behind the vertical piece so it will not creep back as I drive the screws

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diverlloyd

3707 posts in 2415 days


#3 posted 02-05-2019 08:04 PM

I have some angle iron the I clamp to the backside.

View bondogaposis's profile

bondogaposis

5569 posts in 2909 days


#4 posted 02-05-2019 08:08 PM

I’d use the Kreg right angle clamp.

-- Bondo Gaposis

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BuffaloBrewer

73 posts in 1377 days


#5 posted 02-05-2019 08:12 PM

When I need to do something like that I’ll clamp a piece of scrap with a few clamps on the left side of the joint and butt the vertical board against it. Much like the angle iron diverlloyd uses.

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NeophyteGrant

121 posts in 1067 days


#6 posted 02-05-2019 08:24 PM

Thanks guys. I think I need to refine my finesse—I’ve tried the angle iron (using one or two clamping squares) or board butted against the back. What’s stymied me is the want for the vertical piece to want to pivot or slide to either side. Once I misfire, it’ll try to back up into the same misaligned hole, which is always fun. I might need to space the squares to they cover the entire 3 1/4 inche back face and reduce that pivoting.

That 90 degree angle clamp looks like a beaut—going to look into it.

View AlaskaGuy's profile (online now)

AlaskaGuy

5420 posts in 2867 days


#7 posted 02-05-2019 09:33 PM



I would attach it just as you have it pictured. I use a clamp on the board behind the vertical piece so it will not creep back as I drive the screws

- Davevand

+ simple effective cheap handy

-- Alaskan's for Global warming!

View Zonker's profile

Zonker

108 posts in 409 days


#8 posted 02-05-2019 09:53 PM

I have actually used a speed square and Quik Grip clamps to do what you describe. In fact I took a cheap plastitic one I had lying around and modified it to work better. I removed the webbing along the fence end and then removed the sawtooth pencil guides along the blade end. Then I made up a block to saddle over where I removed the pencil guides and glued it on. All told I invested about fifteen minutes in it. I will be the first to admit it has quite the redneck look, but it works for me.

-- Larry A. - I've made a small fortune with my woodworking. The trouble is, I started with a large fortune.

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ArtMann

1445 posts in 1374 days


#9 posted 02-05-2019 10:06 PM

I would shoot a couple of 16 gauge by 2-1/2 inch finishing nails to prevent slippage before driving the screws.

View jtdon's profile

jtdon

28 posts in 1065 days


#10 posted 02-05-2019 10:21 PM

I clamp a block, position the vertical board and use it to drill 2 pilot holes with a thin drill bit. When you drive your screws the board will stay lined up.

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runswithscissors

3081 posts in 2583 days


#11 posted 02-05-2019 11:12 PM

This application is where an old fashioned hand screw works well. Like the ones you used in the school shop class. Can be clamped at any angle, and hold solidly. They would even provide some vertical stability.

-- I admit to being an adrenaline junky; fortunately, I'm very easily frightened

View NeophyteGrant's profile

NeophyteGrant

121 posts in 1067 days


#12 posted 02-08-2019 11:17 PM

Thanks again all. I am going to redo the stringers and use a block and pre-drill like you said, JTdon, so any grab on the screws doesn’t throw it off square. The block will reference the front face, then the below setup with clamping squares for 90 degrees and so it doesn’t back up on me while drilling the pilots. My other thought was to use clamping squares to position and hold the stringers, then clamp it between the two face frames with parallel clamps to lock it down. Will see which approach is quicker.

View Mike_D_S's profile

Mike_D_S

596 posts in 2773 days


#13 posted 02-09-2019 04:25 AM

So I don’t have a better idea for clamping than the ones you got above, but I do have a tip for getting the screws to drive without shifting the wood.

With softer woods and some hardwoods, when I insert the screw into the pocket, I run the drill in reverse for a bit pressing down a little. This will tend to create a small pilot hole without the aggressive heads driving the screw in.

Then I’ll flip the drill to forwards and drive the screws. A lot of the time, this will help with the small motion that sometimes get introduced when you drive the pocket screws in.

Mike

-- No honey, that's not new, I've had that forever......

View Robert's profile

Robert

3569 posts in 2039 days


#14 posted 02-09-2019 03:42 PM

For a cart, like you’ll be wheeling it around the shop?

Why pocket screws? Why not just screw straight in with 3” construction screws?

Which do you think will be stronger?

-- Everything is a prototype thats why its one of a kind!!

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WoodenDreams

830 posts in 469 days


#15 posted 02-09-2019 11:53 PM

+1 with rwe2156

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