I am trying to determine my bow rail diameter. I have a 2006 grady 208. I believe it is a 1 inch diameter bow rail but does anyone know for sure?
Grady 208 Bow Rail Diameter?
- Thread starter Mark DV
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Wrap a string around it make a match mark. Stretch out the string and measure accurately between marks. Divide that number by Pi. But since you probably already know that Pi is 3.14, if you measure 3.14 (or awful darn close), then you don't have to divide. Could also use a set of Vernier calipers... but you probably wouldn't be asking if you had them! 
This is the fun way to do it. Reading Seasick's post is not fun.
This is the fun way to do it. Reading Seasick's post is not fun.
wires38
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If you pass a Harbor Freight on the way, grab a few of these. Measures ID,OD, and depth. Or spend a few more bucks on a digital model.
www.harborfreight.com
6 In. Utility Caliper
Amazing deals on this 6In Utility Caliper at Harbor Freight. Quality tools & low prices.
www.harborfreight.com
MarineBob
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Heck, that's cheaper than a box of cereal......If you pass a Harbor Freight on the way, grab a few of these. Measures ID,OD, and depth. Or spend a few more bucks on a digital model.
6 In. Utility Caliper
Amazing deals on this 6In Utility Caliper at Harbor Freight. Quality tools & low prices.
enfish
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But then you have to spend the next 2 hours trying to figure out how to read that vernier scale...
MarineBob
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Look at the picture, I don't think its a vernier scale, just line up the 0 and you get an inch reading. If it were a vernier, I'd say it would be pretty much only good to use as a ruler.But then you have to spend the next 2 hours trying to figure out how to read that vernier scale...
MarineBob
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I got one of the digital calipers on sale several years ago, something less than 10 bucks. I don't use it a lot but its pretty good for the money. I am not sure I'd set up critical bearing clearances with it, but for home shop use, its a steal. And I am on the original button cell battery.
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enfish
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I was just making a joke because trying to determine 1.0 inches from 0.875 or 1.125 won't require reading the vernier, but that Harbor Freight caliper is exactly a vernier scale
Hookup1
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This isn't a SpaceX project. Wrap a piece of paper around it and mark it!
D = Circumference / pi . If you're going to do it every day buy a tool.
D = Circumference / pi . If you're going to do it every day buy a tool.
MarineBob
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The pic looks like two linear/arithmetic scales. One English/American and the bottom metricI was just making a joke because trying to determine 1.0 inches from 0.875 or 1.125 won't require reading the vernier, but that Harbor Freight caliper is exactly a vernier scale
enfish
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I don’t know what to tell you. That type of caliper is literally called a vernier caliper, whether it’s SAE, metric, or both.
No more bad engineering jokes from me. I’ve gotten lazy over the years because 95% of the time I use digital calipers at work. The other 5% of the time is my own personal dial caliper. Vernier calipers are a PITA to figure out exact measurements and it takes me too long, hence the joke…
MarineBob
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I stand corrected. I looked at a blow up of the ad pic. I guess its reads .801 or there abouts. I am thinking I was recalling slide rules. Digital calipers are a lot simpler
MarineBob
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Man, I only used the word "Vernier" as a general reference for the OP since he probably isn't familiar with this stuff and if I just said "caliper", he might think I was referring to a braking system. I didn't realize it would cause such a stir!