What is the bearing crush?

Bearing Crush The term “crush” refers to the outward force created by the portion of the bearing that extends above the housing bore when the bearing halves are set into place. This “extra” material holds the outside diameter of the bearings firmly against the housing bore when the assembly is torqued to specification.

Why do we measure the bearing nip?

It is most important that the shell is fitted to its housing with the correct amount ofbearing ‘nip’. The nip is a measure of the amount by which the shell is gripped in the housing when the bolts securing the bearing are tightened.

How do you check bearing crush?

The quality of the bearing fit is ascertained by checking the ‘bearing crush. ‘ Undo and remove one bolt either one &, starting at 0.075 mm / 0.003 in the feeler gauge, see if the feelers gauge will go into the gap between the cap and the block.

What is crush height in bearing?

Crush height is the difference between the outside circumferential length of a half bearing (one half shell) and half of the housing circumference [1] measured at a certain press load.

What is the advantage of bearing crush in shell bearing?

Bearing crush, as it is called, is incorporated for a number of reasons, for when clamped together the compression in the bearing shells provides a high resistance to the shell turning or progressively creeping in the direction of the crankshaft, as well as supporting the thin and otherwise flexible structure during …

How do main bearings affect oil pressure?

Engine bearings are curved pieces of metal that more resemble a potato peal than the bearings on your bicycle wheels. If the clearance between the bearings and the shaft is too great, pressurized oil leaks beyond the sides of the bearings, allowing the pressure to drop in those drilled passages.

What is nip clearance?

The nip is a measure of the amount by which the shell is gripped in the housing when the bolts securing the bearing are tightened. The shims are also clamped between the bearing cap and the main body of the housing, which may be either a connecting rod or the crankcase.

What is a bearing locating lug?

The locating lug on a half shell bearing registers with a mating slot in the housing to. locate the bearing shell (figure 1). The lug is not intended to prevent bearing rotation. Crush holds the bearings in place and prevents spinning just as press fit holds bushings in place which have no locating lugs.

What is thin shell bearing?

It is made of tri-metal, they are steel shell, copper or lead alloy and thin layer of soft metal surface. Easy replacement in case of bearing worn out. (