JB/T 5302-2019Rolling bearings - Supplementary designs of housings for insert bearings - Boundary dimensions (English PDF)

4.1 General

For the purposes of this document, the symbols given in GB/T 7811-2015 and in 4.2 to 4.8 hereof apply.

The symbols (except those for tolerances) shown in Figures 1 to 7 and the values given in Tables 1 to 7 denote nominal dimensions unless specified otherwise.

Note: Figures 1 to 7 are drawn schematically and do not necessarily show all design details. The grease nipple positions in Figures 1 to 7 are examples. Other positions are at the discretion of the manufacturer.

4.2 Highly centered plummer block housings (see Figure 1)

A: (overall) width of base;

Da: spherical seating diameter of housing

H: distance from the mounting base to the center of the spherical diameter;

H0: height of bearing housings;

H1: height of feet;

J: centre distance between bolt holes;

L: (overall) length of base;

N: width of bolt hole;

N1: length of bolt hole.

4.3 Narrow plummer block housings (see Figure 2)

A: (overall) width of base;

Da: spherical seating diameter of housing;

F: bolt hole depth;

H: distance from the mounting base to the center of the spherical diameter;

H0: height of bearing housings;

H1: height of feet;

J: center distance between bolt holes

L: (overall) length of base;

M: diameter of bolt hole.

4.4 Adjustable oval housings (see Figure 3)

A: (overall) height;

A1: width of flange;

A2: distance from the mounting base to the center of the spherical diameter;

Da: spherical seating diameter of housing;

H: height of flange;

J: center distance between bolt holes;

L: (overall) width;

N: diameter of bolt hole;

P: adjusting arm width;

S: length of bolt hole adjusting groove.