Page 144 - CITS - Fitter - Trade Theory

FITTER - CITS

LESSON 23 : Lapping and Honing, their application

Objectives

At the end of this lesson you shall be able to
• define the lapping and honing
• state the process of lapping
• state the process of honing
• state the application of lapping and honing.

• Introduction To Lapping and Honing:
Lapping and honing are two precision machining processes used in engineering and manufacturing to achieve
specific surface characteristics and dimensional accuracy. While they share similarities in their objectives, they
are distinct methods with unique applications.

1 Lapping:
• Lapping is a precision machining process used to produce flat surfaces or extremely fine surface finishes.
• It involves rubbing two surfaces together with an abrasive slurry or compound between them.
• The abrasive particles remove material from the workpiece surface, resulting in flatness and fine finishes.
• Lapping is commonly used in industries such as aerospace, automotive, and optics for applications requiring
high precision and surface quality.

2 Honing:
• Honing is a precision machining process used to improve the geometry, surface finish, and dimension of
cylindrical bores or holes.
• It employs a specialized tool called a hone, consisting of abrasive stones attached to a rotating spindle.
• The hone is inserted into the cylindrical bore, and the abrasive stones remove material, achieving specific
surface finishes and dimensional accuracy.
• Honing is widely utilized in industries such as automotive, aerospace, hydraulic systems, and firearms
manufacturing for applications requiring precise tolerances and smooth surface finishes.]
• Process of lapping and honing:

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CITS : CG & M - Fitter - Lesson 22