Press Fit Chart

Wobble or shake between mating.

Press fit chart. Units given in inches. Bearing fit chart shaft and housing. Press fit which can be separated pressed fits with guaranteed interference. Some of the selected preferred fits.

Part will turn and slide freely. H7 p6 h7 r6 h8 r7 p7 h6 r7 h6. Adapting to many situations holding parts in perfect alignment easily introduced but forming a lasting bond i could either be describing press fits or your favorite pair of jeans. Wobble or shake between mating parts very slight.

Class iii medium fit running fits under 600 r p m and journal pressures under 600 lbs sqin and for sliding fits. Some of the applications. Or over and journal pressures of 500 lbs sqin or over. This standard defines preferred limits and fits for press fits applications of non threaded cylindrical features preferred tolerances limits fits calculator rc lts this calculator will determine the preferred size and limit tolerances for running or sliding to interference locational fits per ansi b 4 1.

Locational interference fits are used where accuracy of location is of prime importance and for parts requiring rigidity and alignment with no special requirements for bore pressure. The truth is press fits aren t for every application just like skinny jeans there are pros and cons. Press fits have so many great features you might wonder why they don t replace all other connections. The following tables are a guide for establishing shaft and bearing fits for miniature and instrument bearings when the expansion coefficients of the shaft and housing are similar or when the operating temperature differential between them is nominal.

Class ii free fit running fits with speeds of 600 r p m.