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Forum topic by LucasWoods posted 01-25-2015 07:58 PM 680 views 0 times favorited 7 replies Add to Favorites Watch
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LucasWoods

219 posts in 796 days


01-25-2015 07:58 PM

I am gluing up my workbench today and need some help. Demensions are 30X60 and it is made up of 15 2×4’s standing on end.

My first question is how tight should my clamps be I have 7 36 inch jorgensens bar clamps. Should I keep tightening till I can’t see any light through the cracks?

Also how much glue will I be needing? Or should I look for a certain amount of glue to be compressed out when tightening and stop at a certain point?

-- Colorado Springs, CO


7 replies so far

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AlaskaGuy

2406 posts in 1772 days


#1 posted 01-25-2015 08:03 PM

What did you do as far as stock preparation goes. There shouldn’t be any cracks. For glue ups you should joint your stock so it fits together without cracks.

-- Alaskan's for Global warming!

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LucasWoods

219 posts in 796 days


#2 posted 01-25-2015 08:08 PM

This is just like a temp workbench for awhile so no preparations just bought the 2×4’s from the lumber yard then cut to length

-- Colorado Springs, CO

View bondogaposis's profile

bondogaposis

4027 posts in 1814 days


#3 posted 01-25-2015 08:20 PM

Do you mean standing on edge? Jorgensen makes several types of bar clamps, the pony’s are pretty light duty for clamping a bench top. The I-bar clamps are much better and can deliver a lot more pressure. I would apply as much pressure as you physically can whichever clamps you have. For gluing a benchtop I would get a gallon of glue. You won’t need it all but it is better than running out. I also would not try to glue all 15 pieces at once. That would be a nightmare. Start out by gluing 3 to see how it goes, then maybe graduate to 4 or 5. Glue 3- 5 at a time then glue the sections together to get the full width.

You realize that 15 2×4’s will not give you a 30” wide bench, it will be 22 1/2”.

-- Bondo Gaposis

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AlaskaGuy

2406 posts in 1772 days


#4 posted 01-25-2015 08:21 PM

These clamps?

Tighten them up until the bars start bowing , stop there and live with the results. I don’t think you’ll be able the draw all the crack together.

-- Alaskan's for Global warming!

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LucasWoods

219 posts in 796 days


#5 posted 01-25-2015 09:00 PM

Yes those clamps are the clamps I have. I am just curious how I know if I and putting too much pressure and how much glue should I put?

-- Colorado Springs, CO

View crank49's profile

crank49

3981 posts in 2434 days


#6 posted 01-25-2015 09:35 PM

+1 on the 15 2×4s equal 22 1/2” wide instead of 30”.

A very important point, and one I haven’t seen mentioned here, is to be absolutely sure the boards are all square and level and not in a twist when you glue them. You need to do a dry fitup to check this. Once the glue is in there you will just barely have enough time to put it all together and get it clamped before it won’t move anymore.

Doing this in two or three steps is better. But, with no preparation of the surfaces you might wind up with a couple of 12” wide sections that don’t mate and clamps will not be able to draw together.

Go to www.woodgears.ca and watch how Mathias glues stuff. Good instructions there.

-- Michael: Hillary has a long list of accomplishments, though most DAs would refer to them as felonies.

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daddywoofdawg

1010 posts in 1038 days


#7 posted 01-26-2015 02:57 AM

glue sqeeze out is what your looking for.place a piece of wood beteewn the clamp and the wood your gluing or you’ll get dents where the clamps were.also say 3 clamps under and 2-4 above or whatever number you need point is clamp from top and bottom, and if you try to do a good job it can be a fine bench forever.nothing wrong with a glued up 2×4 bench top.

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