Profile of a Line of a radius of 25mm basic dimension - Question

DWPOZE

Registered Visitor
#1
We have a part that has profile of a line of a radius of 25mm basic dimension with a profile tolerance of 1mm. I understand that the radius must be 25mm +/- .05mm. If I measure the part and 25.03. Would the result .03 or would I double that to .06. Thanks for your help. I don't understand why you would double it.
 
Elsmar Forum Sponsor

Colin

Quite Involved in Discussions
#2
Re: Profile of a Line Question

If I understand your question correctly, you are measuring a radius so no, you don't double it, just take the dimension for what it is. Of course if you were measuring the radius as part of a circle you would need to double it.
 

Stijloor

Staff member
Super Moderator
#3
We have a part that has profile of a line of a radius of 25mm basic dimension with a profile tolerance of 1mm. I understand that the radius must be 25mm +/- .05mm. If I measure the part and 25.03. Would the result .03 or would I double that to .06. Thanks for your help. I don't understand why you would double it.
1 mm or 0.1 mm? Let's assume 0.1 mm. The profile tolerance zone is a 0.1 zone within which all elements of the profile must lie. The default allocation of the profile tolerance zone per ASME Y14.5 is "equally disposed about true profile." That means 0.05 up and 0.05 down from true profile. Not necessarily +/- as you call it. If the deviation from true profile is measured 25.03, then the measurement is correct.

Hope this helps.
 

DWPOZE

Registered Visitor
#4
We deal with a lot of sheet metal parts that have a basic radius dimension and a profile tolerance. So on the part I mentioned above is out .03 would I report the profile as .03 or would I double it? Thanks
 
D

David DeLong

#5
Profile is 0.1 mm (range) or 0.05 mm from basic profile. Since you measured and found it to be 25.03 which is 0.03 from the basic dimension, one would have to report 0.06. So, tolerance is 0.1 and actual is 0.06.

Remember, you divided the tolerance range by 2 and then measured. Now that you have measured it and found it 0.03 off true profile, you have to multiply it by 2 to get back to the tolerance.
 

Paul F. Jackson

Quite Involved in Discussions
#6
David is correct.
If you are going to compare the deviation from true profile directly to the profile tolerance then you must reflect the amount of tolerance equally disposed about the true profile (in this case) needed to contain the deviation.

R 25.0 [profile|0.1|...] is 0.06 (+0.03)
Paul
 

Stijloor

Staff member
Super Moderator
#7
We have a part that has profile of a line of a radius of 25mm basic dimension with a profile tolerance of 1mm. I understand that the radius must be 25mm +/- .05mm. If I measure the part and 25.03. Would the result .03 or would I double that to .06. Thanks for your help. I don't understand why you would double it.
Can you share an actual drawing of the part? Or at least part of it?
 
Thread starter Similar threads Forum Replies Date
I Lifetime Support Calculation - Thermal Operating Profile Reliability Analysis - Predictions, Testing and Standards 7
M How to verify profile gages provided by customer General Measurement Device and Calibration Topics 5
E Department Plan for QA and HSE (profile, plans, structure, goals, etc.) Misc. Quality Assurance and Business Systems Related Topics 2
G Gear Profile & Lead Report Manufacturing and Related Processes 1
P Romer Arm - Profile of a Surface Changing General Measurement Device and Calibration Topics 4
R Reporting Profile of a surface with U modifier Inspection, Prints (Drawings), Testing, Sampling and Related Topics 4
B Profile of a Surface Callout on this Drawing General Measurement Device and Calibration Topics 4
O Can a Profile of a Surface have a Diameter Symbol? Inspection, Prints (Drawings), Testing, Sampling and Related Topics 3
R Temperature Profile for Transport Simulation (Sterile Eye Drops) Other Medical Device Related Standards 1
P Profile Tolerance and CPK Manufacturing and Related Processes 3
K Can a Surface of a profile be applied to a feature of size? GD&T questions Inspection, Prints (Drawings), Testing, Sampling and Related Topics 1
quality1 Form IPC 1720A Assembly Qualification Profile still required? Various Other Specifications, Standards, and related Requirements 1
J Profile of Surface with Basics and Angle Inspection, Prints (Drawings), Testing, Sampling and Related Topics 10
B Requirement to have Customer Signature Profile on File Document Control Systems, Procedures, Forms and Templates 4
T CMM Inspection of Profile Tolerance Inspection, Prints (Drawings), Testing, Sampling and Related Topics 15
M Measuring a circle's profile Inspection, Prints (Drawings), Testing, Sampling and Related Topics 2
C Complex Surface Profile as a datum Inspection, Prints (Drawings), Testing, Sampling and Related Topics 8
M Surface Profile and True Position Question Inspection, Prints (Drawings), Testing, Sampling and Related Topics 5
R Capability for CMM Scanned Profiles on a feature with a Bilateral Profile Tolerance Capability, Accuracy and Stability - Processes, Machines, etc. 26
C Inspecting a Profile Tolerance for a Die Cut Gasket Inspection, Prints (Drawings), Testing, Sampling and Related Topics 2
K Profile of a Surface Tolerance - Part with a 195 mm radius on it Inspection, Prints (Drawings), Testing, Sampling and Related Topics 9
S Surface Profile of a Hole - The meaning of the tolerance in the provided drawing Inspection, Prints (Drawings), Testing, Sampling and Related Topics 1
AnaMariaVR2 A Profile of the Pharmaceutical Manufacturing Industry: Russia Pharmaceuticals (21 CFR Part 210, 21 CFR Part 211 and related Regulations) 1
B Surface Profile Callouts - How the profiles are being dimensioned Inspection, Prints (Drawings), Testing, Sampling and Related Topics 5
C I need to verify the surface profile of a part - Sine plates General Measurement Device and Calibration Topics 4
optomist1 Contour vs. Profile - Is there a connection between "Contour" & "Profile"? Inspection, Prints (Drawings), Testing, Sampling and Related Topics 12
optomist1 Composite Profile Tolerancing Clarification Inspection, Prints (Drawings), Testing, Sampling and Related Topics 21
optomist1 ASME GD&T Certification Test - Converting Coordinate Tolerances to Profile Tolerances Inspection, Prints (Drawings), Testing, Sampling and Related Topics 8
optomist1 Profile of a Surface - Applying Profile of a Surface Geometric Control Symbols Inspection, Prints (Drawings), Testing, Sampling and Related Topics 6
A Customer Profiles - Creating a Customer 'Profile' for our Top 10 Customers Document Control Systems, Procedures, Forms and Templates 2
B Measuring the Profile of a Surface Inspection, Prints (Drawings), Testing, Sampling and Related Topics 19
C Reporting Profile of a Surface Results on an Internal Cylindrical Feature Inspection, Prints (Drawings), Testing, Sampling and Related Topics 5
J Reputable Third Party Inspection (Metrology Lab) In USA? Cam Profile Measurement General Measurement Device and Calibration Topics 5
P ISO 20072 Requirements - Example or template of a DFP (device functionality profile) Other Medical Device Related Standards 2
O How to report Profile of a Sphere crossed by a Hole Inspection, Prints (Drawings), Testing, Sampling and Related Topics 31
A Capability Studies for Profile (GD&T Callout) Capability, Accuracy and Stability - Processes, Machines, etc. 6
M Changing Job Profile - Logistics Engineer to Buyer Career and Occupation Discussions 3
S Benchmarking PVC Profile Extrusion Metrics Benchmarking 2
G How to calculate profile of a surface? Inspection, Prints (Drawings), Testing, Sampling and Related Topics 1
CycleMike Profile of datum planes - Profile callout back to datum A (itself) Inspection, Prints (Drawings), Testing, Sampling and Related Topics 4
J Angularity or Composite profile - Angularity callout on a recent print Inspection, Prints (Drawings), Testing, Sampling and Related Topics 4
S Oven Qualification - Thermal profile during the OQ of a vacuum oven General Measurement Device and Calibration Topics 6
A Checking Profile Tolerance on CMM's Inspection, Prints (Drawings), Testing, Sampling and Related Topics 7
B New Print Profile Symbol? Misc. Quality Assurance and Business Systems Related Topics 6
P Design an experiment to optimize the PCB solder reflow profile Design and Development of Products and Processes 4
K Calculation for Similarity and Differences in dissolution profile (F1&F2 Values) Pharmaceuticals (21 CFR Part 210, 21 CFR Part 211 and related Regulations) 4
C Definition GD&T Clarification - Callout for Profile of a Surface Reference to the Datum Definitions, Acronyms, Abbreviations and Interpretations Listed Alphabetically 34
D Hole Surface Profile Tolerance Discussion Inspection, Prints (Drawings), Testing, Sampling and Related Topics 12
Sidney Vianna Management System Maturity Profile Misc. Quality Assurance and Business Systems Related Topics 1
U Company Profile Template wanted Document Control Systems, Procedures, Forms and Templates 4

Similar threads

Top Bottom