02 bearing plummer block

bearing plummer block

1. Machine Drawing - Bearing :- Plummer Block - S.Gunabalan Associate Professor Mechanical Department Bharathiyar College of Engineering & Technology Karaikal - 609 609. Ph : 04368-265915/265916 Fax : [phone] Mobile : [phone]

2. Symbol of first & Third angle Projections

3. Symbol of first & Third angle Projections Paper Plane

4. Symbol of first & Third angle Projections

5. Scale Scale is the ratio of the linear dimension of an element of an object as represented in the drawing, to the real linear dimension of the same element of the object itself. Designation SCALE 1 : 1 for full size, SCALE × : 1 for enlarged scales, SCALE 1 : × for reduced scales. The designation of the scale used on the drawing should be shown in the title block.

6. Lines Lines of different types and thicknesses are used for graphical representation of objects

7. Conventions for Sectioning The objective of sectioning is to show the inner details of a machine component. A cutting plane cuts the object and the section is viewed after the removal of cut portion. Cutting planes are designated by capital letters and the direction of viewing is indicated by arrow marks . The cutting plane(s) should be indicated by means of type H line

8. Conventions for Sectioning In principle, ribs, fasteners, shafts, spokes of wheels and the like are not cut in longitudinal sections and therefore should not be hatched.

9. Sections not to be Hatched

10. Sections not to be Hatched

11. Sectioning w ith two parallel planes

12. Sectioning in two Intersecting Planes

13. Half - Section Symmetrical parts may be drawn, half in plain view and half in section.

14. A local section may be drawn if half or full section is not convenient. The local break may be shown by a continuous thin free hand line.

15. Successive sections may be placed separately, with designations for both cutting planes and sections

16. Part - A Answer All the Questions Draw the symbol of first angle projections ? Define scaling in machine drawing ? List the types of line ? How to designated cutting plane ? List few machine element which should not be hatched ?

17. Part - B 1. Assemble all parts of thePB, shown in Fig. below and draw the following views: (i) Half sectional view from the front, and (ii) Top View (iii) Side View Also make the parts list and bill of materials. Dimension the view completely.