Dimensions for raw lumber

[CCOS]

I'm trying to decide on how much extra wood I need add to my board when millig so I have enough to plane away.

So if I need to end up with a 1" board what thickness do you cut it in fra the stock? and do you just ad the same amount if it was a 3" og 4" board you need after it is planned?

 

Jesper

[se7enthdevil]

1/4" should be enough if the boards are stacked correctly so they stay flat.

[Woodworks]

Think 1/4" over would be to little unless very stable wood. The boards are going to shrink in thickness during drying and then there is any cupping and warping to plane out. If you're looking at wide boards planing out cupping can end up with an alarming amount of wood being removed.

 

Many other variables to consider

 

The cut of the board ie through and through of quarter sawn

Width you want the finished boards

How perfect you need both faces

How stable the species is

 

If I needed a perfect 1" finished I would buy 1 1/2" boards and except a fair amount of waste unless I found some exceptional 1 1/4" stock. Somewhere between the two would probably be fine.

[Big J]

I'd always say allow at least 10mm, depending on timber species. If you are cutting timber to sell, always cut thicker than you sell it at (so that your customer feels they are always getting a bit more, and so that your 1.5" stock is never less than 1.5").

 

So for instance, cut 1" at 27mm, 1.25" at 34mm, 1.5" at 40mm (or even 42mm), 2" at 54mm and so on.

[Logrod]

If you're just cutting for yourself then it also depends how you're planning on planing the timber later. I tend to rip mine into 26cm widths since that's what I can plane on my planer thicknesser if I had a wider planer then I'd find I was losing more thickness from cupping