A bearing at the larger (crankshaft) end of a connecting rod in an engine.
The bearings are made of cast steel and each consist of an upper and lower part secured to the connecting rod by means of fitting bolts, the nuts of which are secured. Compression shims are provided between the bottom end bearing and the palm of the connecting rod.
The bearings have white metal bearing surfaces provided with lubrication grooves for the necessary supply of lubricating and cooling oil. Shims of different thickness are inserted between the shells to enable adjustment of the bearing clearances (approx. 0.20-0.30mm).



Related Terms

BRIDGE GAGE

A gage which is normally used to determine turbine bearing wear.

PILE BENT

A row of timber or concrete bearing piles with a pile cap forming that part of a trestle which carries the adjacent ends of timber stringers or concrete slabs.

OIL LIFT

Hydrostatic lubrication of a journal bearing by using oil at high pressure in the area between the bottom of the journal and the bearing itself so that the shaft is raised and supported by an oil film whether it is rotating or not.

OILLESS BEARING

A self-lubricating bearing containing solid or liquid lubricants in its material.

MOLDED-FABRIC BEARING

A bearing composed of laminations of cotton or other fabric impregnated with a phenolic resin and molded under heat and pressure.

L-4 TEST

An engine test in a six-cylinder spark-ignition Chevrolet engine to evaluate crankcase oil oxidation stability, bearing corrosion, and engine deposits.

LOW-PRESSURE AREA

The point in a bearing where the pressure is the least and the area or space for a lubricant is the greatest.

JOURNAL FRICTION

Friction of the axle in a journal bearing arising mainly from viscous sliding friction between journal and lubricant.

JEWEL

1. A bearing usually made of synthetic corundum and used in precision timekeeping devices, gyros, and other instruments. 2. A bearing lining of soft metal, used in railroad cars, for example.

HINDLEY SCREW

An endless screw or worm of hourglass shape that fits a part of the circumference of a worm wheel so as to increase the bearing area and thus diminish wear. Also known as hourglass screw; hourglass worm.

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