Reply by Rammstein1224

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Posted on Any measuring tools with tenths of an inch?

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33 posts in 1322 days

#1 posted 03-14-2017 02:50 AM

The problem i see is that the trade size of wood is nice and nominal but in reality its usually shorter. Im sure theres some big long explanation for that but it sure make making things as perfect as possible hard. On top of that is i do all my projects in CAD. I cannot freeball it, just dont have that in me. So i draw everything “perfect” so its nice to be able to then transfer that to the wood to get as close as possible and then tolerances arent as big a factor due to the natural properties of wood.

e.g. 3/4” plywood is actually around .70 so .05 doesn’t sound like alot but multiply that by even 3 or 4 times and it adds up. How do traditional woodworkers compensate for that?

But that rule looks nice…

Woodworking is an ancient art – most all stock is fractional dimensions. You have precision implications when converting back and forth. 5/16” tolererences to 1/32” while 0.3125” suggests 0.0001” – impossible in wood 0.31” doesn t obviously map to 5/16” and implies .010” tol.

Incra makes incredible rules:

Fractions make it easy to halve and double in your head – a common event in woodworking.


- Madmark2

-- As an OCD engineer I live in a perfect world with a hobby of woodworking that is anything but perfect.

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