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Join Date: May 2012
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Taper Callout On Print

05/07/2012 5:13 PM

I have a taper callout on a print that I am not sure how to interpret. Basically it shows a numerical value with a line underneath it, and below that is a nominal value with a bilateral tolerance.

Any help?

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#1

Re: Taper callout on print

05/07/2012 5:20 PM

NO, not without more information. Does it look like this? Are any of the numbers followed by one of these:°,",'? This is copied from Wiki.

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#2
In reply to #1

Re: Taper callout on print

05/07/2012 5:43 PM

have an email? I can't seem to post pic

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#4
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Re: Taper callout on print

05/07/2012 5:48 PM

Just hover the cursor over my screen name and click. That screen will give you a mail option.

I'll try to post what you send for everyone else to see, too, if that's OK.

Also, what's the controlling specification for dimensioning and tolerancing the drawing?

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#3

Re: Taper callout on print

05/07/2012 5:43 PM

How is the drawing dimensioned? ASME Y14.5-2009? Or other?

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#5
In reply to #3

Re: Taper callout on print

05/07/2012 5:49 PM

jis

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#6

Re: Taper callout on print

05/07/2012 5:57 PM
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#12
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Re: Taper callout on print

05/07/2012 9:03 PM
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#7

Re: Taper callout on print

05/07/2012 6:12 PM
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#8
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Re: Taper callout on print

05/07/2012 6:47 PM

I don't have a clue.

[PDF] JIS Japanese Industrial Standards
Maybe Machinery's Handbook.

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#9
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Re: Taper callout on print

05/07/2012 6:53 PM

Thank you just the same :)

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#10
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Re: Taper callout on print

05/07/2012 7:07 PM

Patience Grasshopper,

If there's one thing that abounds here, it's opinions. Many will be along. You'll have to separate the wheat from the chaff, or declare crop failure.

Where is Wingman1985 when we need him???

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#11
In reply to #7

Re: Taper callout on print

05/07/2012 8:08 PM

My guess (and it's just a guess) would be that portion which is 8mm in length can have a taper varing between 1 mm per 17mm run and 1mm per 23mm of run.

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#13
In reply to #11

Re: Taper callout on print

05/07/2012 10:14 PM

GA. (You beat me to it.)

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#14
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Re: Taper callout on print

05/07/2012 11:29 PM

Old guy's rule !! GA

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#15
In reply to #11

Re: Taper callout on print

05/08/2012 5:15 AM

Those were my initial thoughts. My confusion lies with the 17 and 23 mm run. In terms. of run, is that referring to the o d.? Would comparator or calipers be the way to go?. How would you measure?

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#16
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Re: Taper callout on print

05/08/2012 9:13 AM

You would calculate the two angles: (1) use 17 for the hypotenuse and 1 for the short leg and (2) use 23 for the hypotenuse and 1 for the short angle. Your tolerance would be between these two angles which would be easily measured on the comparator.

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#19
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Re: Taper callout on print

05/08/2012 11:31 PM

IF Ronseto is right, the RUN (17-23) would be the long leg, not the hypotenuse

Rise/Run is the tangent of the angle; you are calculating the sine of the angle.

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#22
In reply to #19

Re: Taper callout on print

05/09/2012 1:32 PM

You are correct. My bad.

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#20
In reply to #15

Re: Taper callout on print

05/09/2012 12:07 PM

Run refers to distance horizontally re the drawing. Rise refers to distance vertically.

So the angle must be between 2.49 degrees and 3.37 degrees. Measuring would depend upon the equipment available, and whether or not the piece is mounted on something that would permit automated measurement.

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#21
In reply to #20

Re: Taper callout on print

05/09/2012 12:27 PM

I suppose if you were sampling production, you could use a pair of angle gauges that you'd pass the piece through. The part should contact the small end on one gauge and the large end on the other.

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#18
In reply to #7

Re: Taper callout on print

05/08/2012 10:43 PM

It seem to be a plug to close a hole in a motor block , as the hole is cilyndric it will fit tigth , also it is need to release from the forming tool .

Sure its brass or mild steel to be tin coated.

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#17

Re: Taper Callout On Print

05/08/2012 4:49 PM

KAM, The taper spec states that the part requires a taper angle of 1/20 starting at the o.d where the 1.6 surface finish spec is shown (I see x0.38 - x0.26 but can't make out the rest). The tolerance limits of that angle are 1/17 and 1/23 as mentioned. You can check the od (x0.38 -x0.26) with calipers or micrometer because that diameter is tightly controlled not to mention it also has a tight roundness tolerance. Although important, the taper is secondary. I suppose a comparator would work but it's 2012 and CMM is more accurate since you can check o.d, taper, and roundness at the same time.

Ron got it right but just to stir the pot...he said "...can have a taper". The taper spec is not a tolerance for the shape of the part. The taper spec is the requirement.

Ron you still got a GA from me. Like I said, I'm just disturbing the poo!

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devitg (1); dgibson (2); dkwarner (1); K_Fry (2); KAM6361 (5); lyn (5); ronseto (1); SolarEagle (2); TerraMan (1); Tornado (1); WJMFIRE (1)

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