Unit 4_Part 1 CSE2001 Exception Handling and Function Template and Class Temp...
Classification of Bearing - Machine Design
1. MACHINE DESIGN (2161909)
By :- Sajan Gohel (160123119010)
Branch: - Mechanical
Batch: - 7D1
Guided by: prof. Dhaval Patel
Gandhinagar Institute of Technology
Topic: -
CLASIFICATION OF BEARING
2. Bearings
Bearing is a machine component which supports another machine element (known a
journal).
It permits relative motion between the contact surfaces of the members, while carryin
the load.
Classification of Bearings
. Based on the Direction of Load
1. Radial Bearing
Load acting perpendicular to the direction of motion of moving element.
2. Thrust Bearing
Load acts along the axis of rotation.
3. . Based on Nature of
Contact1. Sliding Contact Bearing
Sliding takes place between the fixed and moving element of
bearing and its also known as plain bearing
4. 2. Rolling Contact Bearings
Balls or rollers introduced between moving and fixed elements
and it is also known as anti-friction bearings
5. Types of Journal Bearings Based on Lubricatio
Journal Bearing
• Hydrodynamic Bearing
• Hydrostatic Bearing
Hydrodynamic Bearing
It is a lubricated journal bearing that uses fluid, liquid or gas lubricants
to separate the moving surfaces completely without an external
pressure supply, required pressure to support journal inside the bearing
is generated from wedging action inside the journal.
6. . Hydrostatic
BearingsIt is also known as externally pressurized lubrication in which
the pressurized lubricant pumped into clearance of bearing and
journal
hence it can support higher loads even at stationary conditions with
very low starting friction resulting very low tear an wear. But they
are
very expensive
7. . Rolling Contact Bearings
• Rolling contact bearings are also known as antifriction bearings.
• The load, speed, and operating viscosity of the lubricant affect the friction characteristics of a
rolling bearing.
• These bearings provide coefficients of friction between 0.001 and 0.002.
• The designer must deal with such matters as fatigue, friction, heat, lubrication, kinematics
problems, material properties, machining tolerances, assembly, use and cost
8. Rolling Contact Bearings
• Rolling contact bearings are also known as antifriction bearings.
• The load, speed, and operating viscosity of the lubricant affect the fric
characteristics of a rolling bearing.
• These bearings provide coefficients of friction between 0.001 and 0.00
• The designer must deal with such matters as fatigue, friction, heat,
lubrication, kinematics problems, material properties, machining toleran
assembly, use and cost
10. Ball Bearings
Deep groove bearing
• Single row of deep groove ball bearing can combinational
of radial and thrust load.
• Load capacity is limited by the number of balls.
• Primarily designed to support radial loads, the thrust
capacity is about 70% of radial load capacity.
11. Filling notch ball bearings
• Bearings have the same basic radial construction as Conrad type. H
a filling notch (loading groove) permits more balls to be used.
• Radial load capacity is 20 – 40% higher than Conrad type.
• Thrust load capacity drops to 20% (2 directions) of radial load capacity
12. Angular contact Ball bearings (AC)
• The centerline of contact between the balls and the raceway is at an a
to the plane perpendicular to the axis of rotation.
• Used for high radial and thrust load applications
14. Roller Bearings
• Roller bearings have higher load capacity than ball bearings, load is
transmitted through line contact instead of point contact.
• Helical rollers are made by winding rectangular material into roller. D
to inherent flexibility they are capable of taking considerable misalig
• A roller with length much larger than diameter is known as needle roller
and are used where radial space is limited. Cage nay be absent in needle
bearings.
