The Machine Drawing Bearings Class 12 handwritten notes have been prepared for quick Engineering Graphics revision according to the 2026-27 CBSE syllabus. The PDF covers bearing use, journal bearings, open bearing, bush bearing, half section views, assembly and disassembly drawing steps.
- Best for: last-minute drawing-sheet revision before boards.
- PDF includes: 23 handwritten pages with colour-coded bearing diagrams.
- Focus area: open bearing and bush bearing assembly views.
These handwritten notes follow the official Class XII Engineering Graphics Bearings chapter and focus on the view logic students need while drawing open bearing and bush bearing questions.
Student Feedback
In a Collegedunia poll of 10,840 Class 12 Engineering Graphics students, 74% of students said hand-drawn bearing layouts helped them remember sectioning and projection steps faster before the 2026 boards.
Source: 2026-27 Collegedunia Class 12 Engineering Graphics revision poll.
What Machine Drawing Bearings Class 12 Handwritten Notes Include
The notes begin with why bearings reduce friction and support a rotating shaft. They then explain plain bearings, journal bearings and the two NCERT drawing types: open bearing and bush bearing.
- Journal bearing load direction and shaft-axis logic.
- Cast iron body with brass, bronze or gun metal bush.
- Half-section front view with top view or side view.
- Important dimensions, scale and projection symbol reminders.
Open Bearing and Bush Bearing Difference for Class 12 Boards
Open bearing and bush bearing look similar at first, but their construction details are different. Open bearing uses a U shaped body and a collared bush. Bush bearing uses a soft bush fitted inside a bored body.
| Point | Open Bearing | Bush Bearing |
|---|---|---|
| Main use | Slow speed shafts | Higher load at medium speed |
| Key part | Collared replaceable bush | Soft bush inside body bore |
| Lubrication | General greasing or oiling | Oil hole shown at the top |
Bearing Assembly Drawing Workflow for Engineering Graphics
The safest way to draw a bearing question is to follow a fixed order. Read the required views first, then place the body and bush on the same centre line. Do not rotate the part during disassembly unless the question asks for a new position.
- Draw the front view with the correct half in section.
- Project the top or side view from the same centre line.
- Hatch only solid material, not the bore or empty space.
- Add six or eight dimensions based on the question.
Open Bearing Assembly Drawing Video for Class 12
Source: VISHWAKARMA ENGINEERING DRAWING CLASSES on YouTube
Common Bearing Drawing Mistakes in Machine Drawing
Most mistakes in this unit happen after the main outline is correct. Students lose marks when the section side, hatching or projection relation is wrong.
- Drawing right half section when the question asks left half section.
- Hatching the hollow shaft bore or oil hole.
- Forgetting elongated bolt holes in the sole plate.
- Missing the scale, title or projection symbol.
Other Resources for Machine Drawing Bearings Class 12
| Resource | Use it for |
|---|---|
| Isometric Projection Handwritten Notes | Revise the previous Engineering Graphics drawing unit. |
| Class 12 Notes Reference | See another structured revision article layout. |
| Computer Networks Handwritten Notes | Use another diagram-heavy handwritten revision PDF. |
All Chapters Handwritten Notes for Class 12 Revision
| Chapter | Handwritten Notes |
|---|---|
| Engineering Graphics Chapter 1 | Isometric Projection of Solids Handwritten Notes |
| Engineering Graphics Chapter 2 | Machine Drawing Bearings Handwritten Notes |
| Maths Chapter 10 | Vector Algebra Handwritten Notes |
| Computer Science Chapter 11 | Data Communication Handwritten Notes |
Machine Drawing Bearings Class 12 Handwritten Notes FAQs
Ques. What is included in the Machine Drawing Bearings Class 12 handwritten notes?
Ans. The PDF includes bearing basics, journal bearing, open bearing, bush bearing, half section views, projection steps and common drawing mistakes.
Ques. Are open bearing and bush bearing both covered?
Ans. Yes. The notes cover both NCERT bearing types with their body, bush, oil hole, sectioning and assembly-view differences.
Ques. How should students revise this PDF before the board exam?
Ans. First revise the part names, then practise one assembly view, one disassembly view and one half-section front view.
Ques. Why is half section important in bearing drawings?
Ans. Half section shows the outside shape and inside bore in one front view, so the examiner can check both construction and sectioning.
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