GD&T - Use of Restrained State/Non-rigid

optomist1

A Sea of Statistics
Trusted Information Resource
#1
Hi To All,

I don't have a problem per se, however, for those GD&T practioners, I am curious as to proper application of the Restraint Notes in industry. Where and when Y14.5M is called out/applied + restraint on non-rigid parts, is this requirement strictly adhered to? When a restraint note(s) is used are they accompanied by the necessary direction, amounts/magnitutdes and sequence of restraint, etc?

Thanks,

Marty
 
Elsmar Forum Sponsor

Stijloor

Staff member
Super Moderator
#2
Hi To All,

I don't have a problem per se, however, for those GD&T practitioners, I am curious as to proper application of the Restraint Notes in industry. Where and when Y14.5M is called out/applied + restraint on non-rigid parts, is this requirement strictly adhered to? When a restraint note(s) is used are they accompanied by the necessary direction, amounts/magnitudes and sequence of restraint, etc?

Thanks,

Marty
Marty,

It depends greatly on the (1) quality (clarity) of the engineering drawing, and (2) the GD&T competence of folks on the receiving end.

A solid dFMEA and pFMEA process should identify and assess the risks associated with manufacturing and inspecting "flimsy" parts.

I am curious to hear from other GD&T Practitioners. :agree1:

Stijloor.
 
H

Hodgepodge

#3
...is this requirement strictly adhered to?
Yes, the requirement is strictly adhered to.
...When a restraint note(s) is used are they accompanied by the necessary direction, amounts/magnitutdes and sequence of restraint, etc?
Yes and no. Depending on the assembly requirements, specific instructions detailing how to restrain or how much restraint will be in a B/P note to ensure repeatability in the restraining process. However, in my industry, quite often the nomenclature will just be similar to, "All dimensions apply when Datums -A- & -B- are restrained within the specified limits of size."
 

optomist1

A Sea of Statistics
Trusted Information Resource
#4
Hi Hodgepodge,

so if I understand you correctly, although restraints are required the methods & means are left up to the drawing user/inspector. Are the drawings per Y14.5M??

Thanks...
Marty
 
T

True Position

#5
If it is not specified, a part should be checked in free state. If a part needs particular clamping, it should be specified on the drawing. I've seen drawings that specify the torque to be applied to particular bolt patterns, usually on sheet metal parts.
 
H

Hodgepodge

#6
Hi Hodgepodge,

so if I understand you correctly, although restraints are required the methods & means are left up to the drawing user/inspector. Are the drawings per Y14.5M??

Thanks...
Marty
You are correct. Here is a direct quote from a print that is designated, “Interpret dimensions and tolerances IAW ANSI Y14.5M - 1994.” (This isn’t the latest version of Y14.5 but you can see what I mean.):

“All dimensions apply when Datums C and A, and surfaces B and H are held flat.”

That is all it says. No description of method.
 
H

Hodgepodge

#7
If it is not specified, a part should be checked in free state. If a part needs particular clamping, it should be specified on the drawing. I've seen drawings that specify the torque to be applied to particular bolt patterns, usually on sheet metal parts.
I have seen this as well, however, I have also seen it not specified.
 

optomist1

A Sea of Statistics
Trusted Information Resource
#8
Thanks to all for your input.....and as a side note I feel so, so, dwarfed by all you "Karma Kings".....thanks again.

Marty :tg:
 
Thread starter Similar threads Forum Replies Date
D Drawing (print) does not specify restrained or free state Inspection, Prints (Drawings), Testing, Sampling and Related Topics 2
optomist1 Maximum Shift Tolerance Restrained Part - Calculation of Datum Shifts Inspection, Prints (Drawings), Testing, Sampling and Related Topics 7
W States that require service provider to have state license Medical Device and FDA Regulations and Standards News 0
K Do I need a "State of the art" plan? CE Marking (Conformité Européene) / CB Scheme 1
M Can a PLD Registered in only one state sell prescription drugs to one in another state Pharmaceuticals (21 CFR Part 210, 21 CFR Part 211 and related Regulations) 0
M Referenced Standards and/or "State of the Art"? IEC 60601 - Medical Electrical Equipment Safety Standards Series 4
M Informational EU – October 2019 update – State-of-play of joint assessments of Notified Bodies in the medical device sector Medical Device and FDA Regulations and Standards News 2
William55401 How Often Does FDA State Consultant Recommended in a Pharma WL? US Food and Drug Administration (FDA) 1
A EU MDR Annex I section 11.3 - Medical Devices labelled as having a specific microbial state EU Medical Device Regulations 7
T Legalizing ISO 13485 certification with an US state department of health ISO 13485:2016 - Medical Device Quality Management Systems 5
T Customer audit demands - that I state in my QM who can shut down production AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 14
M Informational EU – State-of-play of joint assessments of Notified Bodies in the medical device sector – June 2019 Medical Device and FDA Regulations and Standards News 0
M Does ISO 13485 or MDR require you to state the origins of customer requirements or user needs? Design and Development of Products and Processes 2
M Informational EU – Update on state-of-play of joint assessments of Notified Bodies in the medical device sector Medical Device and FDA Regulations and Standards News 1
M Medical Device News State-of-play of joint assessments of Notified Bodies in the medical device sector EU Medical Device Regulations 0
N ISO 14644-1 Clean Room Occupancy State Validation Requirements Manufacturing and Related Processes 3
M Keeping up with "State-of-the-Art" & updated Standards EU Medical Device Regulations 11
R Measuring LiON Battery State of charge - Transporting batteries by Air RoHS, REACH, ELV, IMDS and Restricted Substances 1
D Verification that Manufacturing Equipment has maintained a Validated State Design and Development of Products and Processes 11
Randy New Texas State Trooper Coffee Break and Water Cooler Discussions 6
Gman2 The current state of our Calibration System General Measurement Device and Calibration Topics 28
C How to state that Calibration Services & Equipment are Traceable to NIST General Measurement Device and Calibration Topics 5
K Average height of adults by sex by state Other Medical Device and Orthopedic Related Topics 10
A ISO 17025 sections state "Shall have a Policy and Procedure" ISO 17025 related Discussions 2
K Medical Application Classification in Controlled/Uncontrolled by Mobile App State. 21 CFR Part 820 - US FDA Quality System Regulations (QSR) 6
Ajit Basrur Telangana will be India?s 29th State Coffee Break and Water Cooler Discussions 3
V The ASQ Global State of Quality Book, Video, Blog and Web Site Reviews and Recommendations 2
S SFDA (China's state Food and Drug Administration) changed to CFDA China Medical Device Regulations 6
D State Past Due on its own Meter Inspection ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 6
V Quality/Manufacturing/Six Sigma Jobs - Tri State (NJ,NY,CT) Career and Occupation Discussions 1
Sam Lazzara February 2013 Medical Device "State-of-the-Art" updates Other Medical Device Related Standards 6
A Can Internal Audit Observations be kept confidential from State FDA inspections ? 21 CFR Part 820 - US FDA Quality System Regulations (QSR) 11
L MD State License Requirements for Medical Device Distribution Other US Medical Device Regulations 2
B Safe Disposal of No Clean Soldering Flux in NY State Manufacturing and Related Processes 6
S Labeling & Packaging Procedure required by the state of California ISO 13485:2016 - Medical Device Quality Management Systems 4
E Every US state has Medical Device Regulations beside FDA Regulations Other US Medical Device Regulations 11
Mikey324 How to Check for Legal (OSHA Federal & State) Updates Occupational Health & Safety Management Standards 5
Stijloor Consultant/Auditor needed in New York State Food Safety - ISO 22000, HACCP (21 CFR 120) 1
B CI (Continuous Improvement) Tools and Techniques - What is the state of the art? Lean in Manufacturing and Service Industries 4
K Microbiological State of a Reagent Kit - Enquiry Regarding ISO 18113 Other Medical Device Related Standards 1
somashekar Medical Device Manufacturing License from FDA and State of Location Required? Other US Medical Device Regulations 10
J0anne Prescription Only vs. Over The Counter Pharmaceuticals because of State Laws 21 CFR Part 820 - US FDA Quality System Regulations (QSR) 5
R Class III Medical Device in Netherlands - Member State Country Notifications? ISO 13485:2016 - Medical Device Quality Management Systems 4
G Arizona State University BB Certification course: Seeking opinion on value for cost Professional Certifications and Degrees 8
O Mystery of China SFDA (State Food and Drug Administration) and CCC ISO 13485:2016 - Medical Device Quality Management Systems 26
P ETO Sterilisation of Single Use Part supplied in Non-Sterile State EU Medical Device Regulations 12
Marc Federal and State Taxes for 2009 due 15 April 2010 (US obviously) Coffee Break and Water Cooler Discussions 16
D Requirement of "State Of The Art" in MDD (Medical Device Directive) EU Medical Device Regulations 42
I Where does it state Supplier Corrective Action is required? Supplier Quality Assurance and other Supplier Issues 5
T Polite way to state Continuous Improvement is not a form? ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 8

Similar threads

Top Bottom