What is the purpose of bearing nip?

It is most important that the shell is fitted to its housing with the correct amount of bearing ‘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.

What is the purpose of bearing crush?

By increasing surface contact between the bearing and the connecting rod housing bore, crushing reduces bearing movement, helps compensate for bore deformation, and aids in heat transfer. In simple words, the bearing crush is what keeps the bearing in place.

What is the definition of bearing crush?

The additional height, manufactured into each bearing half, to ensure complete contact of the bearing back with the housing bore when the engine is assembled.

How do you measure bearing crush?

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 shell bearing?

A bearing shell is one component in a system that includes a housing, shaft and lubricant. The bearing system is designed to generate a hydrodynamic oil film in order to separate the bearing shell from the shaft during operation and the design of the bearing shell itself is crucial in achieving this.

What is a bearing spread?

The small extra distance across the parting faces of a bearing half in excess of the actual diameter of the bearing bore.

What is bearing nip and crush?

Brian Clark. , MS student in Mechanical Engineering. The bearing crush (or nip) is the gap between the halves of the bearing housing after the bearing has been inserted and the housing properly tightened.

Which type of bearing is used in crankshaft?

Almost all automotive crankshafts use a plain, shell-type bearing. They are pressure lubricated, and can absorb great loads due to their large surface area. Such bearings are used as main crankshaft support bearings, and connecting rod bearings.

What is journal in bearing?

Journal or plain bearings consist of a shaft or journal which rotates freely in a supporting metal sleeve or shell. There are no rolling elements in these bearings. Low-speed pins and bushings are a form of journal bearing in which the shaft or shell generally does not make a full rotation.