Quality Control Engineering

Selection Of Fits

SELECTION OF FITS

Hole basis system is the most commonly used system because due to the fixed character of hole production tools, it is difficult to produce holes with odd sizes. Commonly used types of fits are given in Table 4.3. Shafts ‘a’ to ‘h’ produce clearance fit, ‘j’ to ‘n’ transition fit, and ‘p’ onwards interference fit with hole.