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How to find half of 11/16 the easy way.

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Forum topic by RussellAP posted 04-09-2012 11:48 PM 6675 views 0 times favorited 13 replies Add to Favorites Watch
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RussellAP

2963 posts in 1005 days


04-09-2012 11:48 PM

How many times have you had to find the halfway point between some odd numbers?
Here is an easy way to measure the distance between those odd measurements.

Put your tape at one end of the board and simply angle the other end till you get to an easily divisible number. Then mark the half way point, or quarters, or whatever.

Here is an example of a board measuring 2 3/4. Some of you know what half of this is, but you don’t have to know, just slide the end of the tape till the other edge is on three inches.

Like this.

Then mark the 1 1/2 which is now halfway. This works on just about anything you want to divide in two, three, four…..

Olef pointed out that the tape I’m using wouldn’t give the ‘exact’ half way point, but if I didn’t have a camera in my hand I’d have started the tape on the one inch mark, or used a ruler which I usually do when I measure. I don’t like tape measures, the rivets can loosen up and make every measurement you use slightly off. I prefer a metal ruler.

-- A positive attitude will take you much further than positive thinking ever will.


13 replies so far

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oluf

257 posts in 1758 days


#1 posted 04-10-2012 12:15 AM

The way you are holding the tape measure in the picture will not give you the half way poin./ The tab on the end of the tape measure is not as wide as the tape. Which side of the tape are you going to read the 1 1/2 inches on?

-- Nils, So. Central MI. Wood is honest.Take the effort to understand what it has to tell you before you try to change it.

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rhett

699 posts in 2386 days


#2 posted 04-10-2012 12:25 AM

Just double the denominator.

-- It's only wood.

View rasp's profile

rasp

75 posts in 977 days


#3 posted 04-10-2012 12:25 AM

picked up this trick in college, from an elderly fellow that grew up in England, earned his apprenticeship building boats. so many tricks to learn.

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RussellAP

2963 posts in 1005 days


#4 posted 04-10-2012 12:34 AM

oluf, I was not in my shop when I did this. I rarely use tape measures, I prefer a ruler, so yes, it won’t be exactly half with this tape unless you hold the tape on the left side of the line. But you get the point. I would hold the tape at the one inch mark if I didn’t have a camera in one hand, lol.

-- A positive attitude will take you much further than positive thinking ever will.

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sandhill

2128 posts in 2643 days


#5 posted 04-10-2012 01:03 AM

Very slick, I will have to remember this. Thanks

View ducky911's profile

ducky911

231 posts in 1508 days


#6 posted 04-10-2012 01:05 AM

Thanks. Very good trick. Ijust learned that the other day. You can use it to find mult. Spacings also like 3 or four equal spaces..good for dovetail layout. Pretty cool trick.

When getting down in fractions i don’t like below 16th. I bought a digital thickness gage and it reads 11/64..?? Whats that?..is that alittle more than 2/16ths….to much info….we are dealing with wood here.

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TopamaxSurvivor

15003 posts in 2395 days


#7 posted 04-10-2012 04:11 AM

Roy and Norm had to demonstrate that about 15 times before I finally remembered it ;-))

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View wee3's profile

wee3

76 posts in 991 days


#8 posted 04-10-2012 04:34 AM

Yea,thats a good tip,use it alot with steel rule@tape.

-- BiLL @wee3

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Martyroc

2708 posts in 1025 days


#9 posted 04-11-2012 02:15 AM

Nice tip, thanks for the reminder I used that tip years ago and somehow forgot all about it.

-- Martin ....always count the number of fingers you have before, and after using the saw.

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TechRedneck

746 posts in 1576 days


#10 posted 04-11-2012 02:23 AM

I just keep a 12” metal center riule in my apron. Use it all the time

-- Mike.... West Virginia. "Man is a tool using animal. Without tools he is nothing, with tools he is all.". T Carlyle

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TechRedneck

746 posts in 1576 days


#11 posted 04-11-2012 02:25 AM

I just keep a 12” metal center ruler in my apron. Use it all the time

-- Mike.... West Virginia. "Man is a tool using animal. Without tools he is nothing, with tools he is all.". T Carlyle

View Richard's profile

Richard

1039 posts in 1409 days


#12 posted 04-11-2012 02:43 AM

ducky911 , 11/64s is time to run it thru the planer one more time for just a skosh bit. and a skosh is a real Tech term. :) I would have to get out my calculator and mess with it for a while to come up with the right answer for that.

View helluvawreck's profile

helluvawreck

15983 posts in 1586 days


#13 posted 04-11-2012 04:10 PM

The tab on the end of the tape is not necessarily accurate anyways. Just use the 1 inch mark and the 4 inch mark and use the middle mark (2-1/2 in.). Better yet use a good 6 inch machinist ruler instead.

helluvawreck
https://woodworkingexpo.wordpress.com

-- If a man does not keep pace with his companions, perhaps it is because he hears a different drummer. Let him step to the music which he hears, however measured or far away. Henry David Thoreau

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