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Profile & Runout CONTROLS in GD&T

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This ppt describes Profile & Runout CONTROLS in GD&T. It also showcase the differences & similarities between the two controls. Kindly suggest your comments as required. Thank you + Regards.

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Profile & Runout CONTROLS in GD&T

  1. 1. Sreelakshmy
  2. 2. Content 1. Profile 2. Profile of a line 3. Profile of a surface 4. Difference of Profile 5. Runout 6. Circular Runout 7. Total Runout 8. Difference of Runout controls 9. Similarities of Runout controls 10. Difference of Profile & Runout
  3. 3. Profile • It is a powerful control in GD&T • It controls the part surface including size, location, orientation, form • Profile control is divided into two: 1. Profile of a line (2-D) 2. Profile of a surface (3-D) • Basic concepts of both the controls are similar • Profile control is applied to a true profile • When profile is applied to a surface of revolution, it automatically applies all around • It clearly defines the tolerance zone, eliminates the accumulation of tolerances Profile control requires Datum and doesn’t require Modifiers (MMC/LMC)
  4. 4. Profile of a line (2-D) • The tolerance zone is 2 dimensional • This control is applied to each line element individually • It provides a limited coverage of the surface and it is usually applied in addition to other dimensions and tolerances that control the surface. • It can be used in addition to the profile of a surface • When it is specified, the tolerance zone is two uniform lines • The tolerance zone applies for each line element of the surface • it has an effect on the view that is applied to • Value of Profile of a line tolerance is LESS than the value of profile of surface
  5. 5. Profile of a surface (3-D) • This control is applied to entire surface of the element • It provides a full coverage of the surface and it is usually applied in addition to other dimensions and tolerances that control the surface. • When it is specified, the tolerance zone is uniform boundary • The tolerance zone applies for full length and width of the surface • It controls the size, location, orientation & form
  6. 6. Differences Profile of a line • 2 D • applied to each line element individually • Controls size, location, orientation, form of a line element • the tolerance zone is two uniform lines • Value of profile of a line is small Profile of a Surface • 3 D • applied to entire surface of the element • Controls size, location, orientation, form of a surface • the tolerance zone is uniform boundary • Value of profile of a surface is large
  7. 7. Runout • It is a composite control • It controls the form, location, orientation of a part feature • It is often used to control the coaxiality of diameter • Control is always applied to RFS • Runout control is divided into two: 1. Circular Runout 2. Total Runout Runout control requires Datum and doesn’t require Modifiers (MMC/LMC)
  8. 8. Circular Runout • It is a composite control which affects the circularity, orientation, location of an element (individually) of a part feature relative to a datum • It is applied independently to each circular element • The tolerance zone is two coaxial circles with center located on the datum axis • The tolerance value is equal to the radial distance between the two circles
  9. 9. Total Runout • It is a composite control which affects the cylindricity, orientation, location of all surface element of a diameter relative to a datum axis, simultaneously • The tolerance zone is two coaxial cylinders • The tolerance value is equal to the radial distance between the two cylinders • It is verified much similar to circular Runout
  10. 10. Runout Circular Runout • Controls circularity, orientation, location of an element (individually) • The tolerance zone is two coaxial circles Total Runout • Controls cylindricity, orientation, location of all surface element • The tolerance zone is two coaxial cylinders
  11. 11. Similarities between circular & total RUNOUT • Verified with dial indicator • Considered as composite control • Maximum axis offset = ½ of Runout values
  12. 12. Differences Profile • controls size, location, orientation, form of a part Runout • controls the form (circularity & cylindricity), location, orientation of a part
  13. 13. Thank you! (Referred from concerned websites)

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