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Posted: 8/3/2009 12:34:18 PM EDT
[#1]
By Nominal diamter are you talking about with or without the threads?
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Posted: 8/3/2009 12:36:34 PM EDT
[#2]
Quoted: By Nominal diamter are you talking about with or without the threads? With Such as a #10x1.5 |
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Posted: 8/3/2009 12:38:55 PM EDT
[#3]
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Posted: 8/3/2009 12:39:25 PM EDT
[#4]
What do you want to know, Major diameter, minor diameter, tap drill size?
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Posted: 8/3/2009 12:40:16 PM EDT
[#5]
Quoted: What do you want to know, Major diameter, minor diameter, tap drill size? I can look all that up in a Machinery Handbook, I want to know the formula used to calculate the nominal diameter. I cannot find the formula in my book. |
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Posted: 8/3/2009 12:40:58 PM EDT
[#6]
ETA I read wrong.
You want to know how to calculate the major diameter for a given thread so that you can turn it out of a piece of bar stock correct? |
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Posted: 8/3/2009 12:43:05 PM EDT
[#7]
Quoted: ETA I read wrong. You want to know how to calculate the major diameter for a given thread so that you can turn it out of a piece of bar stock correct? I typed it wrong, should be a #10 not an M10.  I want to know the formula that calulates nominal diameter when you only know the # of the scew, I know such a formula exsists, just cannot find it in my Machinerys Handbook. |
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Posted: 8/3/2009 12:44:57 PM EDT
[#8]
10 mm screw, 10 divided by 25.4=.3937 Major diameter is .3937
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Posted: 8/3/2009 12:45:40 PM EDT
[#9]
(Number X .013")+0.060"
Therefore (10 x 13) + .060 = .190" |
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Posted: 8/3/2009 12:46:49 PM EDT
[#10]
Quoted: (Number X .013")+0.060" That is it. I did not write it down in my notes when the instructor talked about it, since he said it was in the Machinerys Handbook. Thanks!  |
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Posted: 8/3/2009 12:47:12 PM EDT
[#11]
Quoted: Quoted: ETA I read wrong. You want to know how to calculate the major diameter for a given thread so that you can turn it out of a piece of bar stock correct? I typed it wrong, should be a #10 not an M10. I want to know the formula that calulates nominal diameter when you only know the # of the scew, I know such a formula exsists, just cannot find it in my Machinerys Handbook. I know of no such formula. Whenever I've needed to know, I just measured a screw or looked it up in my book. Hah, neat. Quoted: (Number X .013")+0.060" Therefore (10 x 13) + .060 = .190" |
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Posted: 8/3/2009 12:47:54 PM EDT
[#12]
Quoted: Now go cut me some metric threads on an American Lathe! Quoted: (Number X .013")+0.060" That is it. I did not write it down in my notes when the instructor talked about it, since he said it was in the Machinerys Handbook. Thanks!  |
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Posted: 8/3/2009 12:49:03 PM EDT
[#13]
By looking at that chart the number grows by 1/ 64 with each increment.
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Posted: 8/3/2009 12:50:48 PM EDT
[#14]
Quoted: Quoted: Now go cut me some metric threads on an American Lathe! Quoted: (Number X .013")+0.060" That is it. I did not write it down in my notes when the instructor talked about it, since he said it was in the Machinerys Handbook. Thanks! You mean you cannot do that?   |
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Posted: 8/3/2009 1:05:22 PM EDT
[#15]
Quoted: Not without changin gears in my old South BendQuoted: Quoted: Now go cut me some metric threads on an American Lathe! Quoted: (Number X .013")+0.060" That is it. I did not write it down in my notes when the instructor talked about it, since he said it was in the Machinerys Handbook. Thanks! You mean you cannot do that? |
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Posted: 8/3/2009 1:10:25 PM EDT
[#16]
Quoted: This sucks for 00 and 000 screws! (Number X .013")+0.060" Therefore (10 x 13) + .060 = .190" (For UMS, it's like this: d = 0.060" - (# x 0.013"), where # is the number of zeroes.) |
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Posted: 8/3/2009 1:13:23 PM EDT
[#17]
i am required to go by the dimensions contained in bac5004-2.
Edited to clarify: Boeing Proprietary info, PERMANENT STRAIGHT SHANK FASTENER INSTALLATION BAC5004-2 BOEING PROCESS SPECIFICATION |
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Posted: 8/3/2009 1:58:51 PM EDT
[#18]
Quoted:
Quoted:
Now go cut me some metric threads on an American Lathe! Quoted:
(Number X .013")+0.060" That is it. I did not write it down in my notes when the instructor talked about it, since he said it was in the Machinerys Handbook. Thanks!
Didn't know that was difficult? IIRC, you only have to change one gear to go from a standard thread only lathe to a metric thread. |
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Posted: 8/3/2009 5:54:03 PM EDT
[#19]
Quoted: It's not. But it's more work than a 1/4-20. Quoted: Quoted: Now go cut me some metric threads on an American Lathe! Quoted: (Number X .013")+0.060" That is it. I did not write it down in my notes when the instructor talked about it, since he said it was in the Machinerys Handbook. Thanks! Didn't know that was difficult? IIRC, you only have to change one gear to go from a standard thread only lathe to a metric thread. |
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