Tolerance symbol

Tolerance symbol

1. PCET’S NMIET Presentation On: TOLERANCE SYMBOL By:- Jadhav Lalit Vilas TEMA121 Guidance By:-Prof Khetre Sir

2. INDEX SR NO TOPIC NAME 1 What Is Tolerance Symbol 2 Types Of Tolerance Symbol 3 Straightness 4 Circularity 5 Cylindricity 6 Flatness 7 Parallelism 8 Perpendicularity 9 Concentricity 10 Reference

3. What Is Tolerance Symbol? Geometrical tolerances which are assigned to features related to a datum do not limit the form deviations of the datum feature itself. It may be necessary to specify tolerances of form for the datum feature.

4. Types Of Tolerance Symbol Straightness Circularity Cylindricity Flatness Parallelism Perpendicular Concentricity Reference

5. Straightness The tolerance zone, in the considered plane, is limited by two parallel straight lines a distance apart and in the specified direction only.

6. Circularity  circularity tolerance is used to control the  roundness  of circular parts or features. 

7. Cylindricity Cylindricity is a 3-Dimensional tolerance that controls the overall form of a cylindrical feature to ensure that it is round enough and straight enough along its axis.

8. Flatness The actual surface shall be contained between two parallel planes distance.

9. Parallelism The tolerance zone is limited by two parallel planes a distance apart. The planes are parallel to the datums and in the direction specified.

10. Perpendicularity The tolerance zone is limited by two parallel planes a distance apart and perpendicular to the datum.

11. Concentricity The tolerance zone is limited by a circle of diameter the tolerance value shall be preceded by the symbol . The center of the circular tolerance zone coincides with the datum point.

12. Reference Print Citation A Textbook Of Machine Design By R.S.Khurmi Web Citation http://www.engineeringessentials.com

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