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Adjustable Height Workbench

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Forum topic by MrRon posted 04-03-2013 11:13 PM 2148 views 2 times favorited 11 replies Add to Favorites Watch
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MrRon

2980 posts in 1991 days


04-03-2013 11:13 PM

Here is a sketch of the adjustable height workbench. This version uses two scissor jacks which simplifies the elevating feature. The trailer jacks I wanted to use are too long, restricting the range of adjustment. This bench also has retractable casters, allowing the legs to sit firmly on the floor. By lowering the bench all the way down, the casters are exposed for moving. It will be a month or so before I have it finished. If it works as I hope it will, I will provide drawings. Height range will be 30-3/4” to 43”.


11 replies so far

View RogerInColorado's profile

RogerInColorado

306 posts in 702 days


#1 posted 04-03-2013 11:28 PM

Looks cool. I look forward to seeing it.

View Clint Searl's profile

Clint Searl

1479 posts in 1109 days


#2 posted 04-03-2013 11:52 PM

It’s a clever design, but what’s the purpose?

-- Clint Searl....Ya can no more do what ya don't know how than ya can git back from where ya ain't been

View BTimmons's profile

BTimmons

2178 posts in 1233 days


#3 posted 04-03-2013 11:55 PM

Very interesting.

-- Brian Timmons - http://www.BigTWoodworks.com

View john66214's profile

john66214

2 posts in 627 days


#4 posted 04-04-2013 12:13 AM

I have a question about a assembly/work bench I’m designing. Nothing fancy.
I want to have locking swivel casters under the four corners but my concern is about bench weight and span between the casters. I think the casters are rated for 250 pounds apiece.
The lumber for the project will be minimum four full sheets of 3/4 plywood and the bench top is one sheet of 1 3/8 inch thick by 4 feet by 8 feet MDF. I imagine I need to computer search the weight of the wood. I’m ready to reduce the overall if need be. Any help or ideas is appreciated.

View SebringDon's profile

SebringDon

95 posts in 688 days


#5 posted 04-04-2013 12:18 AM

I don’t have a table quite that fancy, but I can tell you why it’s a great idea. I have a pair of Stanley adjustable saw horses (30-37 inches) I use with a two-bys and a half-sheet of 3/4” ply as a second work table, and the height varies when I set it up depending on what I’ll be doing. I like it low if I’m using my circular saw crosscut jig, medium height for general work like drilling, planing and sanding, up high for applying finish to unassembled components, and either all the way up or all the way down if I’m assembling a project, depending on the size of the project. It’s a great help to an old tired back.

I’d love to have a table that allowed me to adjust the height on the fly. Great idea!

-- Don

View Holbs's profile

Holbs

594 posts in 777 days


#6 posted 04-04-2013 12:32 AM

keeping posting your progress, Ron. I also am curious to see how this turns out. As this could be applied to other tool tables around the shop. From what I have seen much on the internet about raising platforms/tables, is that at 1/2way point and max raised point, there will be noticeable wobble. From your picture, it looks like you will have 2 slits per column for clamping down at required height, which should knock out the wobble issue. But then, you would have to walk around and tighten all those knobs upon raising and then lowering.

I was thinking of having multiple torsion box flip topped “lids” lined up in a row for router table, mitre saw, jointer…etc. To have all the beds lined up to the opposing torsion box lids. I hurt my brain thinking of the mechanics and physics involve, and gave up for the time being. I am going to research using a parrelelogram structure to raise and lower each machine (tho only 6-12”).

View MrRon's profile

MrRon

2980 posts in 1991 days


#7 posted 04-04-2013 08:26 PM

“you would have to walk around and tighten all those knobs upon raising and then lowering.”

My design uses only 2 locking knobs, located on one end only along with the drive for the jacks. The casters retract automatically upon raising the bench, so the bench rests on solid flooring.

“It’s a clever design, but what’s the purpose?”

The purpose of the bench is to allow it to be raised/lowered to suit individual’s working height preference, especially applicable to people with bad backs.

View kdc68's profile

kdc68

2071 posts in 1025 days


#8 posted 04-04-2013 09:33 PM

Your workbench plan incorporating the ability to raise/lower your work piece to a comfortable height is a great idea and well thought out…

-- Measure "at least" twice and cut once

View MrRon's profile

MrRon

2980 posts in 1991 days


#9 posted 04-05-2013 07:15 PM

I have started a blog titled; “Adjustable Height Workbench”. Please go to this blog to follow my progress. Thank you.

View brtech's profile

brtech

712 posts in 1671 days


#10 posted 04-05-2013 07:47 PM

You have seen this, right?
http://www.jack-bench.com/

Same idea

View MrRon's profile

MrRon

2980 posts in 1991 days


#11 posted 04-05-2013 09:34 PM

brtech, Yes. I wasn’t aware of the Jackbench until after I posted my own version of an adjustable bench. Although similar in operation, my bench, I feel is more ergonomic. The controls on my bench are (1) elevating control and (2) locking devices all accessible from one end. Casters on mine retract automatically as the top is elevated. I don’t include any vises or a top as shows as I leave it up to the user to provide to his own preference.

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