LORD Corporation TS-026 STANDARD MEASURING METHODS
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Released Apr-27-2020 Owner: Adis Halilovic TS-026 Sponsoring Authority: Scott Suprynowicz Pg. 1 of 73 Rev. C DCO-004726 LORD Corporation TS-026 STANDARD MEASURING METHODS THE INFORMATION CONTAINED HEREIN IS PROPRIETARY AND CONFIDENTIAL TO LORD CORPORATION AND SHALL NOT BE REPRODUCED OR DISCLOSED IN WHOLE OR IN PART OR USED FOR ANY DESIGN OR MANUFACTURE EXCEPT WHEN SUCH USER HOLDS DIRECT AUTHORIZATION FROM LORD CORPORATION. THIS INFORMATION IS ALSO SUBJECT TO THE JURISDICTION OF THE UNITED STATES EXPORT ADMINISTRATION REGULATIONS (EAR). DIVERSION CONTRARY TO U.S. LAW IS PROHIBITED. Released Apr-27-2020 Owner: Adis Halilovic TS-026 Sponsoring Authority: Scott Suprynowicz Pg. 2 of 73 Rev. C DCO-004726 INDEX Section Description Page 1.0 Scope ...................................................................................................... 4 2.0 Applicable Documents .......................................................................... 4 2.1 Military Specifications/Standards ............................................................. 4 2.2 Industry Documents ................................................................................. 4 2.3 LORD Documents .................................................................................... 5 3.0 Definitions .............................................................................................. 5 4.0 Measurement Guidelines ......................................................................... 7 4.1 Measurement Accuracy and Precision ..................................................... 7 4.2 Measurement Errors ................................................................................ 7 4.3 Environmental Control (Temperature) ...................................................... 8 4.4 General Rules .......................................................................................... 9 4.5 Free-State Variation ............................................................................... 10 4.6 Average Diameter Measurement ........................................................... 10 4.7 Average Wall Thickness ......................................................................... 10 4.8 Restrained Features .............................................................................. 10 4.9 Part Alignment and Orientation for Inspection ........................................ 10 4.10 Plated and Coated Parts ........................................................................ 11 4.11 Thread Inspection .................................................................................. 11 4.12 Coordinate Measuring Machines (CMM) ............................................... 12 4.13 Surface Finish (Roughness) .................................................................. 12 4.14 Recommended Conventions .................................................................. 13 4.15 Measurement Conversion Factors ......................................................... 13 4.16 Visual Inspection .................................................................................... 13 4.17 Inspection Equipment Calibration and Control ....................................... 13 5.0 Measurement Methods ........................................................................ 13 5.1 External Diameters ................................................................................ 14 5.2 Internal Diameters and Holes ................................................................. 15 5.3 Standard Features ................................................................................. 16 5.4 Special Configurations ........................................................................... 19 5.5 Thread Inspection .................................................................................. 20 5.5.1 Thread Matrix ................................................................................... 20 5.5.2 System 21 Thread Inspection ........................................................... 21 5.5.3 System 22 Thread Inspection ........................................................... 22 5.5.4 Specialty Thread Inspection ............................................................. 23 5.6 Spline Inspection.................................................................................... 24 THE INFORMATION CONTAINED HEREIN IS PROPRIETARY AND CONFIDENTIAL TO LORD CORPORATION AND SHALL NOT BE REPRODUCED OR DISCLOSED IN WHOLE OR IN PART OR USED FOR ANY DESIGN OR MANUFACTURE EXCEPT WHEN SUCH USER HOLDS DIRECT AUTHORIZATION FROM LORD CORPORATION. THIS INFORMATION IS ALSO SUBJECT TO THE JURISDICTION OF THE UNITED STATES EXPORT ADMINISTRATION REGULATIONS (EAR). DIVERSION CONTRARY TO U.S. LAW IS PROHIBITED. Released Apr-27-2020 Owner: Adis Halilovic TS-026 Sponsoring Authority: Scott Suprynowicz Pg. 3 of 73 Rev. C DCO-004726 INDEX Section Description Page 5.7 Form Features ....................................................................................... 25 5.7.1 Flatness ........................................................................................... 25 5.7.2 Straightness – Cylindrical Parts ........................................................ 27 5.7.3 Straightness – Flat Surface .............................................................. 29 5.7.4 Circularity - Cylinder ......................................................................... 31 5.7.5 Circularity - Cone ............................................................................. 33 5.7.6 Circularity - Sphere .......................................................................... 35 5.7.7 Cylindricity ........................................................................................ 37 5.8 Profile Control ........................................................................................ 39 5.8.1 Profile of a Line/Surface ................................................................... 40 5.9 Orientation Features .............................................................................. 42 5.9.1 Perpendicularity - Surface to a Datum Plane or Axis ........................ 42 5.9.2 Perpendicularity - Cylindrical Feature to a Datum Plane ................... 44 5.9.3 Angularity ......................................................................................... 46 5.9.4 Parallelism - Surface to a Datum Plane ............................................ 48 5.9.5 Parallelism - Axis of Hole to a Datum Plane ..................................... 50 5.10 Runout ................................................................................................... 52 5.10.1 Circular Runout ................................................................................ 52 5.10.2 Total Runout .................................................................................... 54 5.11 Location Features .................................................................................. 57 5.11.1 Position between Holes and Hole Pattern to Datum ......................... 57 5.11.2 Position of Coaxial Features at MMC ............................................... 59 5.11.3 Position of Noncylindrical Features .................................................. 61 5.11.4 Position at Least Material Condition ................................................. 63 5.11.5 Concentricity .................................................................................... 65 5.11.6 Symmetry ......................................................................................... 67 5.12 Surface Finish (Roughness) ................................................................... 69 Tables Table 1 Cosine Error Correction Factors ......................................................... 8 Table 2 English to Metric Conversion Factors ............................................... 13 Appendices Appendix A Best Practices .................................................................................. 71 THE INFORMATION CONTAINED HEREIN IS PROPRIETARY AND CONFIDENTIAL TO LORD CORPORATION AND SHALL NOT BE REPRODUCED OR DISCLOSED IN WHOLE OR IN PART OR USED FOR ANY DESIGN OR MANUFACTURE EXCEPT WHEN SUCH USER HOLDS DIRECT AUTHORIZATION FROM LORD CORPORATION. THIS INFORMATION IS ALSO SUBJECT TO THE JURISDICTION OF THE UNITED STATES EXPORT ADMINISTRATION REGULATIONS (EAR). DIVERSION CONTRARY TO U.S. LAW IS PROHIBITED. Released Apr-27-2020 Owner: Adis Halilovic TS-026 Sponsoring Authority: Scott Suprynowicz Pg. 4 of 73 Rev. C DCO-004726 1.0 SCOPE 1.1 This specification establishes standard measuring methods in order to achieve consistency of inspection results by LORD Corporation and LORD Corporation supplier inspection personnel. The methods and procedures presented in this document shall be used as indicated unless otherwise specified. Part geometry will determine the specific inspection method/procedure to be used. A particular method of inspection used on a dimension for one specific part is not necessarily the best method to be used on a different part. New or more effective methods are acceptable once the method has been proven to show and assure conformance to the drawing or specification requirements. Alternate methods of inspection and gaging not identified in this specification must be reviewed, documented, and approved by LORD Quality prior to implementation. 2.0 APPLICABLE DOCUMENTS Unless otherwise indicated, the current issue of the below listed documents shall be considered a part of this specification to the extent herein indicated. 2.1 Military Specifications/Standards