Calibration tolerances needed - Calipers, digital indicators, feeler gages, etc

ozziegood

Registered Visitor
#1
Is there some master list out there that will tell me the tolerances of calipers, digital indicators, feeler gages, gage blocks, and gage pins?

Thakns, Marie :)
 
Elsmar Forum Sponsor

Jim Wynne

Staff member
Admin
#2
The manufacturers of those devices will provide specifications and tolerances, although those can be loosened in your applications if it makes good sense to do so.
 

Miner

Forum Moderator
Staff member
Admin
#3
ozziegood said:
Is there some master list out there that will tell me the tolerances of calipers, digital indicators, feeler gages, gage blocks, and gage pins?

Thakns, Marie :)
Do a web search on "gagemakers tolerance". This will give you the tolerances for plug and ring gages for each class (xxx, xx, x, y, z) of gage. Most of the sites also provide guidance on how to select the appropriate class based on the tolerance as well as how the tolerance is applied in the case of a GO or NO-GO gage.

Here is a tip to save external calibration expense: If you have a set of gage pins, class xx, but you really only need class y, specify calibration to class y. Most calibration services charge less for calibration to lower class gages. It also guards against replacing a gage that does not meet xx limits due to wear, but is functionally acceptable.

As pointed out above, the manufacturers are good sources as well as the GIDEP program sponsored by the government.
 
D

Dave Dunn

#4
A rule of thumb for calipers, mics and other instruments with a graduated readout (i.e. digital, vernier scales, etc.) is they should be accurate to ± 1 graduation of their scale. For example, a caliper whose smallest increment of reading is .0005" should be accurate to ±.0005"

As the others have mentioned, you can downgrade your instruments by calibrating to looser tolerances, but they should be noted with their calibrated accuracy. The caliper above could be calibrated to ±.001" if it's not used for measurements that require finer reading, but it should not be used thereafter for finer measurements unless recalibrated and proven capable of doing the measurement accurately.
 
#5
Dave Dunn said:
A rule of thumb for calipers, mics and other instruments with a graduated readout (i.e. digital, vernier scales, etc.) is they should be accurate to ± 1 graduation of their scale. For example, a caliper whose smallest increment of reading is .0005" should be accurate to ±.0005"
Your best bet would be to visist the mfg's web site for accuracy statements. The example above may not always be true since the last digit can toggle between .0005 to .0010. Here is an example for a Mitutoyo Digimatic Thickness Gage. The resolution is 0.00005, but the accuracy stated on Mitutoyo's site is ±.00012".
 
Thread starter Similar threads Forum Replies Date
C ZZ Pin Gage Tolerances and Calibration General Measurement Device and Calibration Topics 2
V Internal Scale and Balance Calibration Method Tolerances and Limits General Measurement Device and Calibration Topics 4
V Calibration Laboratory Environment and Instrument Tolerances General Measurement Device and Calibration Topics 15
J Pressure Gauge Tolerances after Calibration General Measurement Device and Calibration Topics 5
J Confused about Calibration Tolerances of Plug Gauge, Ring Gauge & Snap Gauge General Measurement Device and Calibration Topics 4
lanley liao Question regarding the calibration of monitoring and measure equipment. Oil and Gas Industry Standards and Regulations 0
N IATF Calibration Lean in Manufacturing and Service Industries 3
Q Do these certificates of calibration meet ISO 9001 requirements for traceability to NIST? ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 10
T Plug Gage Calibration Calibration and Metrology Software and Hardware 1
M Load Cell Calibration using a totalizer on a flow meter General Measurement Device and Calibration Topics 0
E Calibration Records needed ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 1
D Limited Range Calibration - 5000 lb Industrial floor scale General Measurement Device and Calibration Topics 3
D Calibration of Small Scales General Measurement Device and Calibration Topics 26
C How to Establish the Calibration & Measurement Capability (CMC)? ISO 17025 related Discussions 1
I IQOQ or just initial calibration required? General Measurement Device and Calibration Topics 3
B Calibration in real life ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 3
J Calibration cycle for monitoring & measuring tools used in medical device manufacturing General Measurement Device and Calibration Topics 5
A Is calibration of test weight required General Measurement Device and Calibration Topics 4
S Calibration Frequency for Slip Gauge Kit used for CMM Calibration? General Measurement Device and Calibration Topics 0
S Calibration/Verification of customer fixtures IATF 16949 - Automotive Quality Systems Standard 6
Ron Rompen Calibration by manufacturer ISO 17025 related Discussions 4
Q Calibration verification records 7.1.5.2.1 IATF 16949 - Automotive Quality Systems Standard 2
B AS9100D 7.1.5.2 Calibration or Verification Method using outside cal lab AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 1
W Next Calibration Due Date Calibration Frequency (Interval) 5
S Where do l get calibration standards to run a calibration lab? Other ISO and International Standards and European Regulations 2
A OEM On-Site Calibration issues during Covid19 ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 12
D Calibration tolerance question using Pipettes Medical Device and FDA Regulations and Standards News 1
M Calibration Certificate Result issued by an accredited external laboratory General Measurement Device and Calibration Topics 9
G Calibration of "Master Parts" Used as Gauges Calibration Frequency (Interval) 5
R Calibration lab environmental monitoring General Measurement Device and Calibration Topics 4
G Calibration of Rotronic probe but not digital readout? General Measurement Device and Calibration Topics 3
F Standard Calibration Procedures: Recommended Practice ISO 17025 related Discussions 0
T Temperature Requirements For In House Calibration - AS9100 AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 16
B Gage calibration frequency, ISO and IATF - What are the requirements Calibration Frequency (Interval) 3
Crimpshrine13 Laboratory Scope - Calibration vs. Test Methods - IATF 16949 IATF 16949 - Automotive Quality Systems Standard 3
Crimpshrine13 Calibration of pH Meter Probe Calibration and Metrology Software and Hardware 3
F ESD workbench "calibration" Manufacturing and Related Processes 2
C Correct Calibration Method for Dial Depth Gage General Measurement Device and Calibration Topics 6
F Nist traceable calibration certificates General Measurement Device and Calibration Topics 1
G Tool tracebility and First calibration requirements for aerospace (AS9100) organisation AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 5
D Calibration of Digital thermometer with surface probe General Measurement Device and Calibration Topics 1
T Calibration or Verification -> Cm and Cmk, etc. Definitions, Acronyms, Abbreviations and Interpretations Listed Alphabetically 3
G Is repeatability required for equipment calibration? General Measurement Device and Calibration Topics 10
was named killer AS 9100D - Calibration Instructions - Controlled documents? AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 6
B Photovoltaic Tester Calibration General Measurement Device and Calibration Topics 0
B Temperature loop: partial calibration General Measurement Device and Calibration Topics 10
G Glass scale calibration at 74 degrees F? General Measurement Device and Calibration Topics 4
A Digital Timer Calibration Requirements General Measurement Device and Calibration Topics 3
Ron Rompen Barcode Verifier Calibration and Use Calibration and Metrology Software and Hardware 5
S Is Optical Parallel Set required calibration? ISO 17025 related Discussions 1

Similar threads

Top Bottom