Profile & Runout CONTROLS in GD&T
Download as PPTX, PDF6 likes2,894 views
The document discusses profile and runout controls in geometric dimensioning and tolerancing (GD&T). Profile controls the size, location, orientation, and form of a surface or line. It can be applied to a line (2D) or surface (3D). Runout controls the form, location, and orientation of features and is often used for coaxiality. Circular runout affects elements individually while total runout affects all surface elements simultaneously. Both profile and runout require a datum but not modifiers.
Profile & Runout CONTROLS in GD&T
- 1. Sreelakshmy
- 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. 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. 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. 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. 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. 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. 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. 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. 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. Similarities between circular & total RUNOUT • Verified with dial indicator • Considered as composite control • Maximum axis offset = ½ of Runout values
- 12. Differences Profile • controls size, location, orientation, form of a part Runout • controls the form (circularity & cylindricity), location, orientation of a part
- 13. Thank you! (Referred from concerned websites)