The gap between the crankshaft journals and the liners can be determined by calculation by measuring the diameters of the main journals, the beds for the liners and the thickness of the liners.
The nominal design gap is 0.050–0.095 mm. If it is less than the limit (0.15 mm), you can use these earbuds again. If the gap is greater than the limit, replace the liners on these necks with new ones. If the crankshaft journals are worn and ground to repair size, then replace the liners with repair ones (increased thickness).
Thickness of liners of radical bearings, mm
Rated | enlarged (repair) | |||
0,25 | 0,50 | 0,75 | 1,0 | |
1,824 | 1,949 | 2,074 | 2,199 | 2,324 |
1,831 | 1,956 | 2,081 | 2,206 | 2,331 |
A sign of the correct assembly and mating of the necks with the liners is the free rotation of the crankshaft.
The numbers 0.25, 0.50, etc. indicate the amount of reduction in the diameter of the crankshaft journals after grinding.