The Best Way to Calibrate Radius Gages

Elsmar Forum Sponsor

Hershal

Metrologist-Auditor
Staff member
Super Moderator
#2
Re: radius gages

I don't know myself, but there should be some others here who can give practical help.
 

BradM

Staff member
Admin
#3
Re: radius gages

Hello Kat! Hello Hershal!

Welcome to the Cove! We're glad you dropped by.:bigwave:

Depending on the accuracy requirements on your instrument, it can get pretty tricky. Generally, you can place a calibrated ball with a known diameter on the measuring surface. What kind of instrument is it and what kind of accuracy is required?

Are you also measuring some kind of surface characteristics, or just radius?
 

Jim Wynne

Staff member
Admin
#4
Re: radius gages

Hello Kat! Hello Hershal!

Welcome to the Cove! We're glad you dropped by.:bigwave:

Depending on the accuracy requirements on your instrument, it can get pretty tricky. Generally, you can place a calibrated ball with a known diameter on the measuring surface. What kind of instrument is it and what kind of accuracy is required?

Are you also measuring some kind of surface characteristics, or just radius?
He's most likely referring to these things. If so, all you need to do is check them for damage periodically. They're cheaper to replace than to calibrate.
 
A

andygr

#5
There are two approches I could sugest.
Use an optical comparitor or even a CMM to check them since they both have higher accuracy that the gauge.
With out either of these you could send them out for calibration ( must have a traceable baseline) and then using blueing lightly coat the radius surface and put in your calibration procedure for these that you will perform a visual inspection to verify the lack of wear as evidance by the blueing still being there and if the blueing is worn away you could then send it out (but might be cheaper to just replace it).
:2cents:
 

Stijloor

Staff member
Super Moderator
#6
Re: radius gages

He's most likely referring to these things. If so, all you need to do is check them for damage periodically. They're cheaper to replace than to calibrate.
I agree with Jim. This type of stuff is easier and cheaper to replace than to "calibrate." Similar to tape measures. Use them for a predetermined time period, purchase new, discard old.

Stijloor.
 
D

David DeLong

#7
Re: radius gages

I agree with Jim. This type of stuff is easier and cheaper to replace than to "calibrate." Similar to tape measures. Use them for a predetermined time period, purchase new, discard old.

Stijloor.
I also agree with Jim on this one. The radius gauges should be reviewed yearly for missing gauges or damage. That is it. If pieces are missing or a bit chewed up, then purchase a new radius gauges.

I don't agree with your thought on tape measures though. One could have a vernier caliper set at 1 inch, 6 inches and maybe another one set at 12 inches. The verniers have had their calibration confirmed using gauge blocks.

One would check the linearity of the tape measure using the veriers as the standard but make sure that they read the tape and not the vernier as I have seen some people try to do.

Also, on a tape, one should check whether the scales are legible and the ends are not loose or damaged.
 
U

Umang Vidyarthi

#8
Can someone tell me the best way to calibrate radius gages?
Hi Kat,

Welcome to cove.The easiest and cheapest way to calibrate radius gages (may or may not be the best)is to use a 'Profile Projector'.The same is also used for checking truency of thread profile. :cool:

CMM,in my opinion is not applicable,in absence of the third dimension. :notme:

Hope this helps.

Umang
 

Jim Wynne

Staff member
Admin
#9
Hi Kat,

Welcome to cove.The easiest and cheapest way to calibrate radius gages (may or may not be the best)is to use a 'Profile Projector'.The same is also used for checking truency of thread profile. :cool:

CMM,in my opinion is not applicable,in absence of the third dimension. :notme:

Hope this helps.

Umang
A "profile projector," or optical comparator, is indeed one possible method. I'm not sure about your comment about using a CMM, though. Just because CMMs are capable of measurement in three dimensions doesn't mean they aren't effective in two-dimensional measurement.
 
U

Umang Vidyarthi

#10
A "profile projector," or optical comparator, is indeed one possible method. I'm not sure about your comment about using a CMM, though. Just because CMMs are capable of measurement in three dimensions doesn't mean they aren't effective in two-dimensional measurement.
Well Jim,I am not aware,wheather CMM can be used in 2D also.I would definitely like to know the method of using CMM for 'Radius gage',and/or any other 2D profile.

Umang :bigwave:
 
Thread starter Similar threads Forum Replies Date
S What is the best way to calibrate a Go NoGo Gauge Calibration General Measurement Device and Calibration Topics 2
A Gauges on pressure tank - What is the best way to calibrate a psi gauge internally? General Measurement Device and Calibration Topics 6
P DFMEA - Machinery Design Best Practices FMEA and Control Plans 0
G Best way to calc uncert for measuring microscope without duplicating repeatability? Measurement Uncertainty (MU) 2
William55401 Distributed By Product - Best Practices for Configuration Management and Purchasing Controls ISO 13485:2016 - Medical Device Quality Management Systems 0
P Best european location to set up for a virtual medical device manufacturer? EU Medical Device Regulations 4
optomist1 Best Optical Comparators General Measurement Device and Calibration Topics 9
qualprod Best practice to ensure inputting of data in production Lean in Manufacturing and Service Industries 19
M Best profilometer for the money General Measurement Device and Calibration Topics 22
P Best Global Option to become an OBL/PLM/Virtual medical device brand in 2020 Other Medical Device Regulations World-Wide 2
earl62 What is the best way to control special characteristics in Control plan? Is it Mandatory to have SPC for IATF 16949? IATF 16949 - Automotive Quality Systems Standard 12
J ISO 13485 System 'soft start' - How to best reflect this in initial audits, management review minutes and other records? ISO 13485:2016 - Medical Device Quality Management Systems 3
S What is the best method to bond urethane foam to urethane foam? Manufacturing and Related Processes 4
Watchcat Best Regulatory Oversight for Off-Shore Device Manufacturing? Other Medical Device Regulations World-Wide 1
E Best way to keep up with pharmaceutical quality knowledge and current affairs Service Industry Specific Topics 1
K Best Measurement Systems Demos in California? General Measurement Device and Calibration Topics 1
qualprod Best approach to get a real value as average? Statistical Analysis Tools, Techniques and SPC 6
CPhelan Best metrics for monitoring low volume (<1000) parts per vendors Supply Chain Security Management Systems 1
DuncanGibbons Best practice for identifying "items" of parts for DFMEA analysis AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 2
I What kind of wine best complements the Friday that you close out your external audit findings? Opinions are welcome. Coffee Break and Water Cooler Discussions 12
I Non-Conformance vs OFI -- your best descriptions ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 61
A What are Practical data center best practices IEC 27001 - Information Security Management Systems (ISMS) 1
G Best Practices for IT auditing - Is a session-id necessary for a complete audit trail? IEC 27001 - Information Security Management Systems (ISMS) 0
S Best software for customer support/complaints? Customer Complaints 0
R Bill of Materials for a complex product - Industry best practice ISO 13485:2016 - Medical Device Quality Management Systems 2
G Oversized Threads - What sized stab pin would be best to quickly check for oversized thread holes General Measurement Device and Calibration Topics 5
D What is the best software used for the pharma compliance management? Pharmaceuticals (21 CFR Part 210, 21 CFR Part 211 and related Regulations) 0
M Informational MHRA launches consultation on how to best engage patients and the public Medical Device and FDA Regulations and Standards News 0
optomist1 Mobility Field Manufacturing Best - Worst Practices Manufacturing and Related Processes 5
qualprod Best criteria to measure Corrective Action effectiveness - Poor Maintenance ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 10
N Best practices for capturing audit objective evidence in a practical manner? Internal Auditing 3
S How to Learn all aspects of ISO 27001:2013 | The best way to grab the knowledge on 27001:2013 (Step by Step) IEC 27001 - Information Security Management Systems (ISMS) 7
I Best visual description for SOPs? ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 18
Z Best Practices - small volume medical device tube cutting (0.020" to 0.080" OD)? Manufacturing and Related Processes 3
M Over-labelling - Any requirements or best-practices? Other Medical Device Regulations World-Wide 0
M Informational DITTA White Paper on Cybersecurity: Best Practices in the Medical Technology Manufacturing Environment Medical Device and FDA Regulations and Standards News 0
M Informational BSI – MDR Documentation Submissions Best Practices Guidelines Medical Device and FDA Regulations and Standards News 0
K Which clause would best fit this Nonconformance? (Supplier Related) Internal Auditing 2
P How to have employees buy-in of quality procedures. Best practices? ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 8
S Expiry date vs. Best Before Date - Reagents ISO 13485:2016 - Medical Device Quality Management Systems 9
C Will anyone please share training material for ISO:13485:2016 for best practices Training - Internal, External, Online and Distance Learning 0
E Best GD&T training - Your suggestions and recommendations please Training - Internal, External, Online and Distance Learning 3
M Best Practice for setting tolerances on a Drawing Inspection, Prints (Drawings), Testing, Sampling and Related Topics 8
M PCBA Drawing Best Practices IPC Class 3 ISO 13485:2016 - Medical Device Quality Management Systems 1
Ron Rompen Best Practices in CMM Correlation Studies General Measurement Device and Calibration Topics 3
B Best place is to purchase IEC 60417 labels that will pass markings test IEC 60601 - Medical Electrical Equipment Safety Standards Series 1
P Best approach to tackle difficult certifications Career and Occupation Discussions 2
E Best Ways to Close a Project APQP and PPAP 3
S Opinions on the "Best" CMM for High Accuracy Machining General Measurement Device and Calibration Topics 9
C What is the best ISO 22000 template pack to purchase? Food Safety - ISO 22000, HACCP (21 CFR 120) 2

Similar threads

Top Bottom