# Performing MSA on Straightness of a Cylinder

B

#### Black arrow

Hello,

I appreciate some supports here concerning making a MSA on straightness on a cylinder. In our production we measure straigtness on outer lateral surface and for each cylinder we only make one measuring. We use a CMM and a v-block as a fixture for the cylinder.

What is the best procedure when it becomes to make this MSA, should we mark on the cylinder where on the outer lateral surface the operator should measure the straightness or should we not mark the cylinder at all?

T

#### True Position

Re: Straightness on cylinder -MSA

Normally to measure the straightness of a cylinder on a CMM take a number of circles at different depths around the pin (or bore) then verify the straightness of the center points.

#### Stijloor

Staff member
Super Moderator
Re: Straightness on cylinder -MSA

Within the context of a cylinder, ASME Y14.5 makes a distinction between:
• Straightness of line elements
• Straightness of an axis (at RFS-MMC-LMC)

T

#### True Position

Re: Straightness on cylinder -MSA

Within the context of a cylinder, ASME Y14.5 makes a distinction between:
• Straightness of line elements
• Straightness of an axis (at RFS-MMC-LMC)
I have never seen that first option used in practice. If that was the case, you would need to check the straightness at multiple/each rotation.

#### Stijloor

Staff member
Super Moderator
Re: Straightness on cylinder -MSA

I have never seen that first option used in practice. If that was the case, you would need to check the straightness at multiple/each rotation.
The OP mentioned "straightness on a cylinder", hence my comment.

I'll ask the OP to attach a drawing/sketch...

#### Stijloor

Staff member
Super Moderator
Re: Question on performing MSA on Straightness of a cylinder

Hello,

I appreciate some supports here concerning making a MSA on straightness on a cylinder. In our production we measure straightness on outer lateral surface and for each cylinder we only make one measuring. We use a CMM and a v-block as a fixture for the cylinder.

What is the best procedure when it becomes to make this MSA, should we mark on the cylinder where on the outer lateral surface the operator should measure the straightness or should we not mark the cylinder at all?
It would help our CMM and MSA experts here if you could attach a drawing/sketch to avoid confusion.

B

#### Black arrow

Re: Question on performing MSA on Straightness of a cylinder

Hi again,

See the attached document.

Straightness of line segment.

#### Attachments

• 26.8 KB Views: 152

#### Golfman25

Trusted Information Resource
Hello,

I appreciate some supports here concerning making a MSA on straightness on a cylinder. In our production we measure straigtness on outer lateral surface and for each cylinder we only make one measuring. We use a CMM and a v-block as a fixture for the cylinder.

What is the best procedure when it becomes to make this MSA, should we mark on the cylinder where on the outer lateral surface the operator should measure the straightness or should we not mark the cylinder at all?
Try it both ways. If you can get good results without marking the cylinder go with that. If you can't, then mark the cylinder. In my experience we have to mark our parts because of too much part variation.

B

#### Black arrow

We have now made the MSA and we marked the cylinder where the operator should measure the parts. I will check the result tomorrow.

B

#### Black arrow

And feel free to make some comments on this.

Thanks!

#### Attachments

• 142.1 KB Views: 345
N Justifications for not performing MSA (Measurement System Analysis) Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 6
Performing a MSA as it relates to Calibration Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 1
J Performing a MSA on a new gauge using different parts Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 2
A Difficulties in performing MSA on Rockwell Hardness Tester Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 20
S Is official MSA training required person performing calibration? IATF 16949 - Automotive Quality Systems Standard 6
Performing a Delta Audit General Auditing Discussions 12
Does AS9100 require traceability to operators performing the work? AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 4
Root Cause Analysis when someone simply stops performing a task? ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 16
ISO 17025:2017 clause 7.6.2 - Performing calibration of its own equipment shall evaluate the measurement uncertainty ISO 17025 related Discussions 6
Question about implications of performing Firmware upgrade via MDDS - Medical Device Data Systems 21 CFR Part 820 - US FDA Quality System Regulations (QSR) 2
Sequence of performing risk assessment: User_FMEA (User Errors) vs Design Inputs FMEA and Control Plans 1
Performing product audits in a manufacturing facility Manufacturing and Related Processes 13
ISO 9001:2015 - How to apply 7.1.5 to an organization performing only design ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 6
Performing PQ on a Small (tabletop) Air Heat Treating Oven ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 4
B Thoughts on performing an ISO 9001:2015 Remote Internal Audit ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 8
H Performing a TUS on a Furnace used at One Temperature - AMS2750-E AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 27
EMR performing audits of EMS Miscellaneous Environmental Standards and EMS Related Discussions 13
C Performing an ISO 9001 based Supplier Audit - Multiple Supplier Facilities Supplier Quality Assurance and other Supplier Issues 4
D Performing a Gage R and R with No Specification Range Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 3
C Going Rate for Performing a Supplier Audit? Consultants and Consulting 1
Production Operators Performing GP12 (General Motors Containment) Customer and Company Specific Requirements 2
L How is the interaction physically happening while performing ANOVA GR&R? Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 1
E Exam for Personnel performing Calibration General Measurement Device and Calibration Topics 7
B Performing a Gage R&R Study with Minitab 13 Using Minitab Software 5
M Requirements for Laboratories performing ASTM Tests Various Other Specifications, Standards, and related Requirements 4
J 5.15 or 6 Sigma? What multiplier to use when performing a Gage R&R Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 2
A SOP for performing Annual Product Reviews for Medical Device and Pharma Pharmaceuticals (21 CFR Part 210, 21 CFR Part 211 and related Regulations) 3
D Severity or Occurrence? Performing an FMEA on Motorcycle Operation FMEA and Control Plans 9
K Performing PPAP Retroactively APQP and PPAP 8
H Proprietary Processes - How to Protect and still comply when performing an FAI? AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 5
J Performing Internal Calibrations - Dial gauges, micrometers, height gauges, calipers General Measurement Device and Calibration Topics 8
D External Parties performing Internal Audits? TS 16949 Clause 8.2.2 IATF 16949 - Automotive Quality Systems Standard 15
Budding Consultant: What to charge for performing a desktop study. Career and Occupation Discussions 10
Upcoming article - Within-part variation when performing an R&R Imported Legacy Blogs 6
D Performing Internal Audit of our Accounts System Internal Auditing 4
Performing Internal Audits as per Canada MDR GD 210 Internal Auditing 7
E Minimum data for performing an Anderson Darling Test Statistical Analysis Tools, Techniques and SPC 1
G Performing an Internal Audit on the Cost Estimating Process AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 7
Badly Performing Packaging Machines Manufacturing and Related Processes 1
D People Management - Managing an under performing subordinate Career and Occupation Discussions 15
Competence for performing compliance audits - 4.5.2 Miscellaneous Environmental Standards and EMS Related Discussions 6
C New to performing internal audits - Looking for audit questions Internal Auditing 5
P For business performing PRODUCT DEVELOPMENT ONLY, what is best QMS for certification? Quality Manager and Management Related Issues 2
A Justification for not performing overseas supplier audit General Auditing Discussions 6
A Performing Ring Gage Calibration General Measurement Device and Calibration Topics 5
E Hypothesis Test - Determining if a second wash is worth performing Statistical Analysis Tools, Techniques and SPC 7
S Performing Investigation of used returned expired devices 21 CFR Part 820 - US FDA Quality System Regulations (QSR) 4
C Guidance in Performing a 13485 Gap Analysis ISO 13485:2016 - Medical Device Quality Management Systems 8
Personnel performing specific assigned tasks shall be qualified - Interpretation IATF 16949 - Automotive Quality Systems Standard 6
F Clinical Audits to ISO 14155 - Performing audits of clinical affairs groups ISO 13485:2016 - Medical Device Quality Management Systems 4