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Types of Followers



A. According to surface in contact
1. Knife edge follower
2. Roller follower
3. Flat follower
4. Spherical follower

B. According to type of follower motion
1. Translatory motion type follower
2. Oscillatory motion type follower

C. According to line of follower motion
1. Radial follower
2. Offset follower




What is follower?

Follower is a machine element which is used in cam and follower mechanism. Cam and follower mechanism is used in various machines to transmit motion from cam to follower (Types of Followers) in a particular direction. Cam has different profile and may be in rotary and reciprocating motion. Good example of cam and follower is used in internal combustion engine for opening and closing intake valve and outlet valve. Cam and follower has different types. Types of followers are as follow.

A. According to surface in contact

Followers are classified by the surface contact between cam and follower is generally come in this group. There are different type of surface contact between cam and follower and according surface contact they are classified as follows.

1. Knife edge follower

Knife edge follower


As per name knife follower has knife edge and knife edge has a surface contact with cam profile (cam profile is a shape of cam). As follower has knife edge, so that there is more wear between follower and cam profile. Due to wear cam profile change with time and does not work correctly. That is reason due to which knife edge is not use in practice.

2. Roller follower

Roller follower


As per name roller follower has roller and surface contact between cam and follower is rolling contact. It reduces wear of cam profile.

3. Flat follower

Flat follower


Flat follower has flat profile at surface contact between cam and follower. It is useful where space is limited. Flat follower is used in automobile engine where space is limited.

4. Spherical follower

Spherical follower


In flat face follower, stresses are produce. In order to reduce this stresses flat face is machined into spherical shape called as spherical follower.

B. According to type of follower motion

In this category followers are classified by the relative motion and movement between cam and follower these are as follow.

1. Translatory motion type follower

In this type of follower, follower have translatory motion means cam is rotating and follower reciprocating between guide way. Example of this type follower is knife edge follower, roller follower, flat follower and spherical follower.

2. Oscillatory motion type follower

Oscillatory motion type follower


In this type of follower, follower has oscillating motion. Cam rotates and as per cam profile follower also move but follower is fixed at point about which follower is oscillate. This type of follower is called as oscillatory motion type follower.

C. According to line of follower motion

In this category, followers are classified by the axis line of follower and these are as follows.

1. Radial follower

In radial follower, axis of follower and centre of cam are in one line or axis of follower is passing through centre of cam is called as radial follower. Example of this type follower is knife edge follower, roller follower, flat follower and spherical follower.

2. Offset follower

Offset follower


In offset follower, axis of follower movement is offset from the centre of cam about which cam rotate is known as offset follower.





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