The Elsmar Cove Forum Conversion Help!! Print with this dimension .2917+/-.0005 :1
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#1
8th April 2009, 12:46 PM
 CMfgT Involved in Discussions   Registration Date: Sep 2007 Posts: 95 Thanks Given to Others: 14 Thanked 2 Times in 2 Posts Karma Power: 32 Karma: 14
Conversion Help!! Print with this dimension .2917+/-.0005 :1

Ok, it has been a long time since math class. We just got a new print with this dimension .2917+/-.0005 :1 -this feature is deals with an included angle.

What the heck does this mean again? I know it changes for every inch. I just don't know anything else.

Thanks

#2
8th April 2009, 12:55 PM
 Jennifer Kirley Forum Moderator   Registration Date: Jan 2004 Location: Maine, USA Posts: 5,206 Thanks Given to Others: 2,982 Thanked 2,835 Times in 1,626 Posts Karma Power: 612 Karma: 27173
Re: Conversion Help!!

Are you saying a tolerance for an included angle is expressed in ten-thousandths of an inch in a ratio?
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#3
8th April 2009, 12:58 PM
 CMfgT Involved in Discussions   Registration Date: Sep 2007 Posts: 95 Thanks Given to Others: 14 Thanked 2 Times in 2 Posts Karma Power: 32 Karma: 14
Re: Conversion Help!!

No, if i remember right the ratio applies to every inch in length. if the length doubles, so does the tolerance. The angle is only .652" long.
#4
8th April 2009, 01:18 PM
 Jim Wynne Cross Forum Moderator   Registration Date: Jan 2005 Location: Southeast Wisconsin Posts: 13,332 Thanks Given to Others: 1,779 Thanked 5,352 Times in 3,430 Posts Blog Entries: 2 Karma Power: 1445 Karma: 39204
Re: Conversion Help!!

Quote:
 In Reply to Parent Post by CMfgT No, if i remember right the ratio applies to every inch in length. if the length doubles, so does the tolerance. The angle is only .652" long.
It's .017" per degree per inch (if I understand what you're looking for). I don't recall offhand anything past the third decimal place.
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#5
8th April 2009, 01:19 PM
 CMfgT Involved in Discussions   Registration Date: Sep 2007 Posts: 95 Thanks Given to Others: 14 Thanked 2 Times in 2 Posts Karma Power: 32 Karma: 14
Re: Conversion Help!!

So what does .2917 +/- .0005 : 1 mean??

Thanks for the info
#6
8th April 2009, 01:36 PM
 Jim Wynne Cross Forum Moderator   Registration Date: Jan 2005 Location: Southeast Wisconsin Posts: 13,332 Thanks Given to Others: 1,779 Thanked 5,352 Times in 3,430 Posts Blog Entries: 2 Karma Power: 1445 Karma: 39204
Re: Conversion Help!!

Quote:
 In Reply to Parent Post by CMfgT So what does .2917 +/- .0005 : 1 mean?? Thanks for the info
I wouldn't hazard a guess without seeing the drawing.
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#7
8th April 2009, 03:52 PM
 Project Man Involved in Discussions   Registration Date: Feb 2009 Location: California Age: 41 Posts: 30 Thanks Given to Others: 11 Thanked 5 Times in 3 Posts Karma Power: 21 Karma: 35
Re: Conversion Help!! Print with this dimension .2917+/-.0005 :1

Quote:
 In Reply to Parent Post by CMfgT Ok, it has been a long time since math class. We just got a new print with this dimension .2917+/-.0005 :1 -this feature is deals with an included angle. What the heck does this mean again? I know it changes for every inch. I just don't know anything else. Thanks
Without seeing the print, here is my first take: Angles can be expressed as minutes and seconds. I believe the :1 is refering to either minutes or seconds of a degree. They may be trying to express the tolerance as +/- ten minutes/seconds of a degree. It seems as though they are expressing the dimension as an arc and not linear.
#8
8th April 2009, 03:58 PM
 Stijloor Cross Forum Moderator   Registration Date: May 2003 Location: Charlotte, North Carolina. Posts: 13,418 Thanks Given to Others: 2,947 Thanked 4,268 Times in 3,025 Posts Karma Power: 1429 Karma: 23887
Re: Conversion Help!! Print with this dimension .2917+/-.0005 :1

Quote:
 In Reply to Parent Post by CMfgT Ok, it has been a long time since math class. We just got a new print with this dimension .2917+/-.0005 :1 -this feature is deals with an included angle. What the heck does this mean again? I know it changes for every inch. I just don't know anything else. Thanks
I agree with my Fellow Covers...Without a drawing it is a wild guess....

A partial drawing will suffice as long as we can see the feature that this applies to and the dimension. If this is a customer drawing...call them and ask.

Stijloor.

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