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Unread 05-16-2008, 09:01 PM
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Where to find a Decimal Equivalent Chart wall poster?

I need some help tracking down a good Decimal Equivalent Chart wall poster; the kind that many machine shops have.

While I've already have memorized most of the course-thread tap and close-fit tolerances for #4 through 1/4-20, it would be nice to have a good wall poster with all the tap, close-fit, free-fit information on it, as well as the decimal/letter/number drill size equivalents.

Bonus points if it has separate hole diameter information for tapping softer materials at 75% and harder materials at 50% thread, as well as information like the minor and major diameter information for common screw sizes. Even more bonus points if it also has the above for imperial and metric, although if you find a good secondary poster with just metric information that's fine.

While I love Machinery's Handbook, just having a quick wall reference could save a lot of time.
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Unread 05-16-2008, 09:43 PM
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Re: Where to find a Decimal Equivalent Chart wall poster?

Print this out: http://www.littlemachineshop.com/Ref...DrillSizes.pdf and laminate it and hang it somewhere handy.

There are other useful references on this page: http://www.littlemachineshop.com/Ref.../reference.php

You can also buy charts at McMaster. Check items 3233T11, 3233T15, 3233T12, 3233T16.
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Unread 05-16-2008, 10:12 PM
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Re: Where to find a Decimal Equivalent Chart wall poster?

300225238357 on ebay is a big one, by Starrett, they have 5 available. probably available elsewhere too.
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Unread 05-16-2008, 11:25 PM
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Re: Where to find a Decimal Equivalent Chart wall poster?

We use this one as well. It is quite handy. We have it taped up for quick reference.

We have a couple of those Starrett pocket reference charts also that we bring along to competition.

We got some really nice laminated charts with all the tap/clearance info on one side and decimal equivalents for metric, number, letter, and fractional drills on the other side. I keep one taped to the front of our mill and it's one of my most used tools. A local tooling supply company gives them out all the time. You may want to check with some around you.

I've never actually opened it up and folded it out, but KBC tools includes a large fold out drill/decimal equivalent chart in the middle of their catalogs. You can get as many as you'd like for free from their website.
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Unread 05-16-2008, 11:43 PM
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Re: Where to find a Decimal Equivalent Chart wall poster?

Fastenal also has some nice little (~4"x6") card size decimal/drill/tap charts that they give away for free. They are right on the checkout counter at our local store. We usually stick one in the various boxes of drill bits. Fastenal also has a nice wall chart of different types of nuts, bolts, screws, etc. showing all the different head types and grades, etc. that is pretty handy to have hanging in the shop as well. I think they are also free. I looked around on the Fastenal website to see if they have them available as a PDF but I didn't see them. I did find this pretty handy PDF reference guide though: http://www.fastenal.com/content/docu...renceGuide.pdf
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