Thread: chair leveling machine, where can i find this??

Why do you need it?
Put the chair on the flat floor, standing on the 3 legs that do touch the floor.
Then put a pencil flat on the floor and draw a line around EACH leg. (side of pencil flat on floor).
Cut each leg where you marked it and it will stand flat.

If you want a similar machine (presumably for high volume production), it looks like you could build a fairly simple table and mount a disc sander beneath it.

_fly_, you probably don't want to cut more than 1 leg.

Find a flat floor, get someone very heavy to sit on the chair.
Cheers,
Jim

John, I have seen such device in books and magazines. They are all home-made and are nothing more than a belt sander attached to a flat surface. I have not seen any commercially made ones.

Originally Posted by Wongo

_fly_, you probably don't want to cut more than 1 leg.

Maybe, But a pencil lead would only be 2.5 - 3mm off the floor and it does mean all legs are right if you do do it. You can go on forever if you try to trim 1 leg, then when it fails another leg etc. Easier to take 3mm off (max) each leg to get it to stand flat.

Lets hope not but I can see the legs getting shorter and shorter by cutting three legs

How does the pictured "chair leveller" know that the chair is going to finish level ?
It looks like a leg shortener to me. There's nothing shown in the image to guarantee the chair seat is level. I understand it probably is unnoticeable in reality but still....

I can't offer a perfect solution but it strikes me that all four legs might be different lengths and you might need to shorten one, two or three legs.

If you're going to do sets, presumably you want seat heights to match, so anything you build yourself needs to consider that too.

Originally Posted by _fly_

Maybe, But a pencil lead would only be 2.5 - 3mm off the floor and it does mean all legs are right if you do do it. You can go on forever if you try to trim 1 leg, then when it fails another leg etc. Easier to take 3mm off (max) each leg to get it to stand flat.

You method needs to cut all 4 legs. Why would you want to do that?

Cutting by hand is difficult to do accurately. It is why people made a jig. With a chair leveling jig, you place one of the long legs on the sander. The sander shortens the leg until the 2 adjacent (short) legs touch the flat surface. Or you can take smaller amount on the 2 longer legs.

If you insist then at least do this.

For what it's worth, I have levelled chair legs using a length of coarse sandpaper. Place the sandpaper face-up on the level surface, underneath the longest leg. Holding the leg firmly down, pull the sandpaper from under the leg and repeat, making sure you do not pull upwards (otherwise the bottom of the leg gets rounded). You need to check as you go as the other legs may require similar adjustment. This method renders close control of the process and a pretty stable result.

Although if you're doing things on a commercial scale you may find this method a bit trying...

Originally Posted by Karl1

For what it's worth, I have levelled chair legs using a length of coarse sandpaper. Place the sandpaper face-up on the level surface, underneath the longest leg. Holding the leg firmly down, pull the sandpaper from under the leg and repeat, making sure you do not pull upwards (otherwise the bottom of the leg gets rounded). You need to check as you go as the other legs may require similar adjustment. This method renders close control of the process and a pretty stable result.

Although if you're doing things on a commercial scale you may find this method a bit trying...

Like this...

Hopefully, I can get a leg up on this one.

Useless stat #29843: Only 27% of people have 1 leg longer than the other. The other 71% have 1 leg shorter than the other. Which group are you in?