It's project of subject EMD in diploma mechanical engineering

1. S.H.JONDHALE DOMBIVLI (w)
.
LIST OF DIFFERENT TYPES OF BEARINGS USED IN BIKES AND
WRITE SPECIFICATIONS .
FOR THE COUSRE:
ELEMENT OF MACHINE DESIGN(EMD-22564)
GUIDED BY:
PROF. AVIRAJ
DEPT. OF MECHANICAL ENGINEERING
NAME OF STUDENTS :
KORKE NAMESH BHAUSAHEB
MEMANE NIKHIL ARJUN
THAKARE SUMEET.J
KHANEDWAL.PRATIK.R
AVHAD.ROHAN
KHAIRE TEJESH
.

2. .
ABSTRACT
"This comprehensive report provides a detailed and thorough analysis of the diverse
range of bearings employed in bicycles. It delves into the intricate specifications of each
bearing type and offers a comprehensive exploration of the rationale that drives their
selection. Through a meticulous examination of the technical attributes and thoughtful
considerations involved in choosing each type of bearing, this report unveils the intricate
mechanics that underlie and significantly influence bicycle performance.”
.

3. All You Need to Know
About Bike Bearings
Bike bearings support and reduce friction between moving parts, ensuring
fast and smooth operation. This presentation explores the different types
of bike bearings and how to select the right one for your needs.

4. Specifications of Bike Bearings
Size
Bearing size is measured by its inner and
outer diameter, and thickness.
Load Capacity
Indicates the amount of force the bearing
can handle before failing.
Speed Rating
Maximum RPM that the bearing can
withstand before failure.
Seals and Shields
Used to protect the bearings from
contaminants and moisture.

5. Overview of Bike Bearings
Bike bearings consist of two rings (inner race and outer race) and balls, which rotate between them.
They can be classified into two main categories: plain bearings and rolling-element bearings. Rolling-
element bearings are further divided into ball bearings, roller bearings, needle bearing, cylindrical
bearing, thrust bearing
Plain Bearings
Also known as sleeve bearings, these have no
moving parts and rely on sliding friction.
Common in pedals and bottom brackets.
Rolling-Element Bearings
These have rolling elements (balls or rollers)
which reduce friction. Used in wheels,
headsets, and hubs.

6. TYPES OF BEARING
1. Ball Bearings:-
Construction: Inner/outer rings, steel balls.-
Function: Smooth rotation, reduced friction.
Uses: Hubs, bottom brackets, headsets,
pedals.
Capacity: Balanced radial and axial loads
2. Tapered Roller Bearings:-
Design: Conical rollers, inner/outer rings.-
Purpose: Radial and axial load handling.
Usage: Steering head, wheel axles.
Features: Robust, efficient load bearing.
.
3. Needle Roller Bearings:-
Structure: Cylindrical rollers, needle-like
Role: Primarily radial load support.
Application: Swingarm pivots, tight spaces.
Advantages: Compact, high radial load capacity.
4. Cylindrical Roller Bearings:-
Design: Cylindrical rollers, inner/outer rings.
Function: Radial and moderate axial loads.
Common Uses: Crankshaft, transmission.
Versatile: Suited for combined loads.
5. Thrust Bearings:-
Layout: Designed for axial loads.
Function: Support axial forces.
Uses: Headsets, bottom brackets.
Purpose: Stable axial load support

10. Level of Maintenance
If you're comfortable with regular
maintenance, you can opt for lower-cost
bearings. If not, invest in high-quality
bearings that require less attention.
Choosing the right bearings for your
bike
Riding Conditions
For rough off-road riding, choose
bearings with higher weight capacity and
shock resistance. For smooth road riding,
opt for lower friction bearings for a faster
ride.
BUDGET
If budget is a constraint, go for
chrome steel bearings instead of
expensive ceramic ones.

12. • A localised compressive stress at the surface of contact between two members of a
machine part, that are relatively at rest is known as crushing stress
Crushing stress

13. • A localised compressive stress at the surface of contact between two members of a
machine part, that are relative motion is known as bearing stress
Bearing stress

14. • When a body is subjected to two equal and opposite forces acting tangentially across the
resisting section, as a result of which the body tends to shear off the section, then the
stress induced is called shear stress
Shear stress

17. Factors Affecting Selection of Bike
Bearings
The selection of bike bearings depends on several factors, including load capacity, speed
requirements, operating temperature, and cost. Proper maintenance and bearing handling are also
crucial for optimal performance and longevity.
Load Capacity & Speed
Bearings should be selected based on the
load they will handle and RPM requirements.
Maintenance & Handling
Proper maintenance and handling can
significantly increase bearing life.

18. Basis for Selecting Bike
Bearings
1 Application Type
Based on the type of bike
application (road,
mountain, or track), the
bearing should be selected
accordingly.
2 Environmental
Conditions
Environmental factors such
as temperature, humidity
and other contaminants
may affect bearing
performance.
3 Cost
The cost of the bearing may play a role in the selection process
and should be balanced against performance requirements.

19. Examples of Bike Bearings in Action
Headset Bearings
These support the front fork
and handlebars, allowing for
smooth steering.
Pedal Bearings
These are found in pedals,
assisting foot rotation and
ensuring a smooth ride.
Wheel Bearings
These are vital for supporting
bike wheels and allowing for
free rotation.

20. Conclusion and Summary
The selection of the right bike bearing is crucial for optimal performance, longevity, and safety.
Consider the application type, environmental conditions, cost, and bearing specifications when
picking the right bearing.
Overview
• Two main categories
of bike bearings:
plain and rolling-
element
• Rolling-element
bearings are further
divided into ball
bearings, roller
bearings, and
needle bearings
Selection
• Bearings are
selected based on
load capacity, speed
requirements,
operating
temperature,
environmental
conditions, and cost
• Proper maintenance
and handling are
also crucial for
optimal performance
and longevity
Examples
• Headset, pedal, and
wheel bearings are
among the most
common bearings in
bikes