Ring Gauges P.D Formula using "Ball Rounded Teeth"

D

Darik

#1
hello I googled my way up here and this place looks like a good place to stay :bigwave:

I'm from a small QA lab. we havin a dificult calibrating ring gauges we got all worked out but one thing. we use a round ball like teeth for the measurment but we have no clue how much to add to the p.d using this ball like teeth.

so basiclly im lookin for a "C" formula for ring gauges using ball rounded teeth.

:thanx:
 
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Wes Bucey

Quite Involved in Discussions
#2
I'm having difficulty recalling an instrument with "ball-like teeth" for measuring/calibrating a ring gage. Is it an internal caliper device or a CMM where the probe that contacts the thread is a rounded surface which rests on the flank of the thread in the same manner as a three -wire gage rests on the flanks of an external thread? (see attached jpg)

If so, I would imagine the process is similar to using the three-wire gage on an external thread.
 

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K

kixxy

#3
Do you mean the Ring gauges teeth are round ? Like a knuckle Thread ?


i would insert an image but unable to until i have posted 2 more times :p
 

Wes Bucey

Quite Involved in Discussions
#4
Do you mean the Ring gauges teeth are round ? Like a knuckle Thread ?


i would insert an image but unable to until i have posted 2 more times :p
Ring gages don't have teeth, they have threads or they are smooth. It is obvious the original poster is talking about a ring thread gage for measuring a standard straight thread, not a tapered thread. Further, his measuring instrument has a rounded tip on each of two [or three] legs which ride on the flanks of the internal thread on the ring gage. (He could also have a modified CMM with only one sensor ball which measures across the diameter of the thread, but I have a difficult time imagining how the true ID is measured across a diameter and not a secant.)
 
Last edited:

Jim Wynne

Staff member
Admin
#5
hello I googled my way up here and this place looks like a good place to stay :bigwave:

I'm from a small QA lab. we havin a dificult calibrating ring gauges we got all worked out but one thing. we use a round ball like teeth for the measurment but we have no clue how much to add to the p.d using this ball like teeth.

so basiclly im lookin for a "C" formula for ring gauges using ball rounded teeth.

:thanx:
Why not use setting plugs (or "master" plugs as they're sometimes called)? They're the generally accepted tool for calibrating/adjusting thread rings.
 
K

kixxy

#6
Sorry i did mean to type Thread. unsure why i said teeth. And when CMMs eght involved in convos i'm out :p just learning them myself
 
D

Darik

#7
we dont have all the masters for all rings. basiclly thats what we do in 2A and some metric but even if we had a bigger master collection one can never get all of them.
 
D

Darik

#8
The best way to discribe what i talk about is by picture. which i need to figure out how. for now all i can do is to try to describe it better.

i am talkin about int. ring gage checks usin this "anchor" with balled edge on both size [which looks like teeth]. i take this anchor and put it on the sip machine goin one way to another. that "anchor" is a part of a set wich i pick from. regardin the picture u send i am lookin for Mw of that unknown insturment.
 
D

Darik

#9
it's been a while since im still thumbelling about it. i could send the link if i get 10 posts... to the pic we use measurments with. can any one can help find data about probes regarding measurments of thread ring gages? :bigwave:
 
R

Randy Lefferts

#10
it's been a while since im still thumbelling about it. i could send the link if i get 10 posts... to the pic we use measurments with. can any one can help find data about probes regarding measurments of thread ring gages? :bigwave:
Can you put the picture on picture hosting site and then provide the link to the picture here? If you are unsure/unable, email the picture to randyllefferts (at) hotmail dot com and I will put it up here.
 
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