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View r33tc0w's profile

Wall Mounted Fold-up Woodworking Bench

by r33tc0w
posted 02-21-2017 04:53 AM


22 replies so far

View papadan's profile

papadan

3584 posts in 3451 days


#1 posted 02-21-2017 06:16 AM

I’m not going to get into the design ideas with you, but can tell you that your bench will be used on 4 legs not 2 and the wall. You do not need a big heavy duty hinge for it. HD sells some piano hinges that will work just fine, or use a pair of 3” door hinges. As for gas shocks, you wont need them either. The bench will be supported by the wall when raised or lowered and will not be too heavy to handle.

View Mike_D_S's profile

Mike_D_S

482 posts in 2297 days


#2 posted 02-21-2017 01:09 PM

A couple of ideas/comments:

Lowering the bench: I agree that you should be concerned about the bench weight when raising, lowering. Since you have the dual goal of minimal storage space but also strength, the bench is expected to weight quite a bit. You don’t want to be trying to hold it up and walking backwards to lower it without some type of assistance or safety measure.

Option 1. A full size truck hood is fairly heavy and gas shocks for that application would probably help give a little support when lowering. They’re cheap enough to try.

Option 2: Install an tie down ring on the edge of the bench and on the wall, then use a small rope block and tackle to raise and lower the bench. Has the advantage that you never have to actually stand underneath the bench during raise/lower. Use a quick connect on the bench end and just let it hang against the wall when not in use. Add a mountain climbing safety catch (the kind you squeeze to let rope out) and you now have a easily controllable solution which is intrinsically safe. If you let go of the release for some reason, it’ll just lock and the bench will stay where it is.

Leg assembly:
Even though it’s tied to the wall, I think you’d want to consider racking. The folding legs essentially have zero racking resistance, so you might want to consider adding a diagonal brace(s) from the top of one leg set to the other or insuring the hinge mechanism is sturdy. You don’t want to work the wall mount loose over time.

I like the idea (you can check out my work table with folding tool stations in my blog), you just have a few special concerns to get a functional bench. I’ll be interested to see how it turns out.

Mike

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

View dhazelton's profile

dhazelton

2786 posts in 2379 days


#3 posted 02-21-2017 02:08 PM

Your design looks like you plan on a VERY heavy unit. I would think just lifting it into place and pulling it down safely may be an issue.

View r33tc0w's profile

r33tc0w

164 posts in 566 days


#4 posted 02-21-2017 03:04 PM

Mike, thanks for the suggestions – I considered the rope method and figured i’d have to use this in addition to the gas springs anyways.

papadan, good call on the door hinges (i’ve got a bunch of these laying around I can use). My intentions are to fashion this bench for a larger space in the future.

-- Matthew 13:53-58

View Notw's profile

Notw

661 posts in 1836 days


#5 posted 02-21-2017 04:00 PM

Here is a flip up workbench I did a while back, there is a 2×4 that runs along the wall that actually supports the weight of the back side of the bench, the hinges only come into play when raising and lowering the bench. I can tell you that this design will support well over 200lbs with no issue and all i used was standard gate hinges.

Click for details

View bondogaposis's profile

bondogaposis

4895 posts in 2434 days


#6 posted 02-21-2017 05:38 PM

That could be a death trap with out some serious thought into raising and lowering it and latching it to the wall when not in use. For one the forward edge of the bench will be over 90” from the floor when raised, not a real convenient for reaching a latch unless you are tall. Definitely you need some type of heavy duty positive fail proof latch to hold the thing up. What kind of measurement is 30 37/64”? I would round that a bit if it was my project.

-- Bondo Gaposis

View Smitty_Cabinetshop's profile

Smitty_Cabinetshop

15443 posts in 2701 days


#7 posted 02-21-2017 05:57 PM

It was just over the weekend, Bondo, that I found myself cutting a 2×4 to the precise length of 30 37/64”. Was it intentional? Uhm, sure, I guess so.

:-)

-- Don't anthropomorphize your handplanes. They hate it when you do that. -- OldTools Archive --

View Woodknack's profile

Woodknack

12227 posts in 2462 days


#8 posted 02-21-2017 07:41 PM

Someone in the last six months built exactly this and I want to say used gas shocks. Sorry can’t remember who. The gas shocks for tonneau covers are inexpensive and probably about right. Treadmills also use shocks for counter balance.

If you plan on working with hand tools I wouldn’t depend on hinges alone, the back and forth will pull the screws out eventually.

-- Rick M, http://thewoodknack.blogspot.com/

View r33tc0w's profile

r33tc0w

164 posts in 566 days


#9 posted 02-21-2017 07:59 PM

lol the 30(37/64)” was sketchup (can never seem to nail down the right dimensions) – 30” is about the height I was considering. There is also a garage door track and stuff already mounted to the wall that I have to design around which is why this thing sits narrow end to the wall. Also fully aware of a death trap scenario. I started to design a track system that would drop the wall side of the table down to the floor and then fold up but that design also had stability issues so instead of that I ended up tearing out a built-in cabinet that I no longer needed to make room. I’m essentially making a drawbridge, wonder if I could program some sound effects as it lowers and raises XD

I think I might try to figure out some sort of locking mechanism like a deadbolt or pin I can engage while the table is down.

What about the leg pieces that stick into the table? Should I do a dove-tail like cut on it or will it be fine squared off?

-- Matthew 13:53-58

View dhazelton's profile

dhazelton

2786 posts in 2379 days


#10 posted 02-21-2017 11:22 PM

You could add a couple of pulleys at the ceiling, add rope and weights (sort of the way old windows used sash weights to ease opening) to help with opening and closing. Unhook the ropes when it’s down so they aren’t in the way.

View r33tc0w's profile

r33tc0w

164 posts in 566 days


#11 posted 03-01-2017 11:12 PM

My FIL is suggesting I look in to Extira (http://www.extira.com) for the bench top – any one have any experience with this product?

-- Matthew 13:53-58

View r33tc0w's profile

r33tc0w

164 posts in 566 days


#12 posted 03-10-2017 04:06 AM

Need some further guidance on these leg joints. I’ve revised the bench-to-leg arms to beef up the joint but now I’m at a roadblock. What sort of hardware do I need for the pivot points and is there a removable contraption I can craft to lock the 2×4 legs to the benchtop arms to minimize/eliminate racking? I started going down a 2×1 route that could be slide in and out of a slot just underneath the pivots but I’m not sure this is the best solution. Thoughts?

-- Matthew 13:53-58

View Lazyman's profile

Lazyman

2286 posts in 1470 days


#13 posted 03-10-2017 04:23 AM

Probably not as beefy as your design but can see another idea for folding legs and wall mounting on the cover of Shopnotes issue #72

-- Nathan, TX -- Hire the lazy man. He may not do as much work but that's because he will find a better way.

View r33tc0w's profile

r33tc0w

164 posts in 566 days


#14 posted 03-14-2017 08:45 PM

Iteration #4
I eliminated the back legs and instead made a support drop all the way to the wall. Figured this was easier, especially since I’m already attached across the width of the bench.

I’m thinking I’ll have to create a knuckle of some sort that attaches the 2 joint locks on either side of each leg and I’ll have to wedge it in place once it’s in lock position. I figured this would give me enough practice – my imagination can get me in trouble sometimes…

-- Matthew 13:53-58

View Woodknack's profile

Woodknack

12227 posts in 2462 days


#15 posted 03-15-2017 12:17 AM

This reminds me of a swing top table I was designing where every solution presented a new problem. So I scrapped the idea and went with a hinge. I think the hang up here is the leg connection. Your folding design will be so bulky that you might as well have a fixed bench.

-- Rick M, http://thewoodknack.blogspot.com/

View Lazyman's profile

Lazyman

2286 posts in 1470 days


#16 posted 03-15-2017 09:58 PM

I agree with Rick. Since the bench is attached to the wall at the other end, it cannot really wobble or sway so is the sliding lock really necessary? Since it looks like the bench will be pretty heavy, it may be pretty awkward trying to get them to line up properly with one hand while also lowering the bench. Don’t forget that the top will move in an arch so it might not even be possible for it to slide together/apart since the joint has to move in a straight line. It is an interesting design idea, though.

The easiest and maybe just as effective approach might be to just use basic strap hinges to attach the legs to the underside of the table so that the weight of the bench ends up sitting on the top[of the legs once it is down.

-- Nathan, TX -- Hire the lazy man. He may not do as much work but that's because he will find a better way.

View r33tc0w's profile

r33tc0w

164 posts in 566 days


#17 posted 03-16-2017 12:53 AM

That’s what my boss said, and followed it with a “good luck”

-- Matthew 13:53-58

View r33tc0w's profile

r33tc0w

164 posts in 566 days


#18 posted 04-07-2017 04:25 AM

3.0….
I have a Yost m7ww vice (https://www.amazon.com/Yost-Rapid-Acting-Wood-Working/dp/B015Z8OTRG) but I’m trying to find a place for it in this setup. Would it work on the tail of the bench like in the photo below or should I offset it to the left side and half the size of the wood jaw?

It seems heavy duty, but I know this was probably designed to have the jaw no more than half the size – how else could I effectively install this to where it’s functional.. on a 2×6 bench top (using 2×4s where necessary). I’m all about aesthetics too, i’ve seen some Frankensteins out there so I want to make sure this flows…

-- Matthew 13:53-58

View r33tc0w's profile

r33tc0w

164 posts in 566 days


#19 posted 04-09-2017 01:00 AM

Any ad-vise?

-- Matthew 13:53-58

View Lazyman's profile

Lazyman

2286 posts in 1470 days


#20 posted 04-10-2017 01:22 PM

That type of vise should be mounted like you showed in post #14 above with the top of of the vise even with the top of the bench. Unless you recess it so that the inside face is flush with the end, there is not much benefit to mounting that long outside face on it. For a wide front vise, you would be better off with a vise style like this:

https://smile.amazon.com/Shop-D4026-Cabinet-Makers-Vise/dp/B005W16LVE/

That style is better designed to attach a wide face to and utilizes the entire end of the bench for the inside face (and it will look better too :-). Personally I would mount a front vise on the end and maybe put the Yost woodworkers vise you have on the side of the bench.

-- Nathan, TX -- Hire the lazy man. He may not do as much work but that's because he will find a better way.

View ChefHDAN's profile

ChefHDAN

1097 posts in 2932 days


#21 posted 04-10-2017 03:42 PM

Let me float another stinker across the parlor… problem with fold up benches is that you’ve got to clear EVERYTHING off of them to fold them up. It seems like the solution, (though I’ve never seen one as hefty as your planning), but it winds up that the bench never gets stowed because it’s too much work to get all the stuff cleaned up or put somewhere else. Maybe scale the bench to fit your space available, and look at a torsion box type of assembly table for bigger projects that you can knock down. I use a door & two B&D workmates for bigger builds when I need it.

-- I've decided 1 mistake is really 2 opportunities to learn.. learn how to fix it... and learn how to not repeat it

View Just_Iain's profile

Just_Iain

291 posts in 499 days


#22 posted 05-09-2017 10:45 PM

I’d vote for a wall hinge along the length of the bench so as to only have 2 legs. Much simpler and you only have to lift up to eye level. Add swing section (made of metal or wood) on the wall to hold the bench top up against the wall and out of the way.

-- For those about to die, remember your bicycle helmet!

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