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Bearings reduce friction between two parts, allowing parts with low resistance to move relative to each other. There are two types, an anti-friction bearing and a sliding bearing. An anti-friction bearing is a wheel bearing in which a rotating shaft can rotate in a stationary housing. Sliding bearings, such as crankshaft bearings and connecting rod bearings, are often used in the engine block. Slide bearings contain no rotating parts and require an oil supply to be lubricated in order to reduce frictional resistance. When there is insufficient oil pressure or an incorrect type of oil is used, sliding bearings can wear out extremely quickly and therefore fail. If this happens with connecting rod bearings, and the crank pins are damaged, you should have the crankshaft ground before fitting new bearings. |
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If new bearings are placed on an imperfect component, the new bearing will also wear out within a very short period of time. Note that, when the crankshaft is ground, an oversized bearing is installed due to the changed clearance. In this category you will find all kinds of bearings for your vehicle, ranging from engine block bearings and pin bush bearings to differential bearings and oil pump bearings. If you have any questions or would like advice, please contact our product specialists. They will be happy to assist you.
Crankshaft ring gear
The ring gear of the crankshaft can be seen as a washer which locks the crankshaft in the engine block. This spacer ring is used to eliminate play, especially on larger engines. This spacer ring is subject to wear and therefore it is best to replace it when carrying out such a repair.
Set of flanges
A set of flanges are individual flange bearings to lock the main bearings / crankshaft bearings to prevent axial play. There are also versions of main bearings / crankshaft bearings where these flange bearings are built in; these are called collar bearings or main bearings with a collar. In this case, the main bearing and flange bearing are made of one piece and loose flange bearings are unnecessary.
Axial bearing
The axial bearing is designed, as the name suggests, to absorb axial forces, such as in the longitudinal direction of the axle. This includes the axial bearing of the crankshaft, which is loaded when the clutch is depressed. The crankshaft is then shifted by this action which the axial bearing absorbs. Another example of an axial bearing is a clutch release bearing which is used in the clutch of the car. Axial bearings are generally ball bearings.
Big end bearing
The big end bearings are so-called sliding bearings. This type of bearing slides directly along the connecting rod and therefore requires external lubrication in the form of an oil film layer. For this reason, this type of bearing breaks down very quickly when no oil (pressure) is present or when the wrong oil with the wrong lubricating properties is used.
Each connecting rod has two big end bearings, an upper part and a lower part. The upper big end bearing is generally subjected to the heaviest load, as it has to endure the power stroke of the piston and transmit this force to the crankshaft. The big end bearings of high-speed engines are also sensitive, as they are subjected to extreme speeds. Defective or worn big end bearings have disastrous consequences for an engine block where, in an extreme case, a connecting rod can emerge through the engine block.
When replacing the connecting rod bearings, check that the bearing surfaces on the crankshaft are undamaged and smooth. When this is not the case, the crankshaft must be reground in combination with an oversize bearing.
Crankshaft bearing
The crankshaft is supported in the engine block by the main bearings, therefore also called crankshaft bearings. The engine oil is pressed, under pressure, through small openings called lubrication channels so that the crankshaft is always supplied with oil between the crankshaft and crankshaft bearing. As with other bearings, friction is minimal, so there is little internal resistance. If oil pressure is lost or if oil of insufficient quality is present, damage to the sliding bearings occurs very quickly. Usually, the crankshaft bearings last a car's lifetime unless there is a lack of lubrication. When the engine block is reconditioned, the crankshaft bearings are usually also replaced. It is important here that the bearing surfaces on the crankshaft are carefully checked. If damage has occurred the crankshaft must be reground, after which oversize bearings must be installed. Next, the clearance must always be measured before fitting everything.
Balance shaft bearing
Here you will find bearings for the balance shafts of your engine block, often used in smaller combustion engines to reduce vibration and imbalance. Balance shaft bearings are usually constructed according to the composition of a needle bearing. These have the advantage that they have a small installation space, high load-carrying capacity and can handle high speeds with minimal frictional resistance.
Camshaft bushes
The camshaft bushes, as the name suggests, support the camshafts. This type of bearing is a sliding bearing just like crankshaft bearings and big end bearings. Engine oil is pressed under pressure through small openings called lubrication channels so that the camshaft is always supplied with oil between the camshaft and the camshaft bush. As with other bearings, friction is minimal, so there is little internal resistance. If oil pressure is lost or if oil of insufficient quality is present, damage to the sliding bearings occurs very quickly. Usually the camshaft bushes last a car’s lifetime unless there is a lack of lubrication. When the cylinder head is reconditioned, the camshaft bushes are usually also replaced. It is important that the bearing surfaces on the camshaft are carefully checked for wear or pitting.
Differential bearing kit
Here you will find complete bearing sets for the revision of the differential. The differential has bearings for the pinion gear and for the carriers on which the 'clock' of the differential rests and rotates. Characteristics of worn differential bearings include loud noises, bumps or a abrasive/scraping sound when making short turns on, e.g. in a car park (locking differential). Installing new bearings in the differential often requires special tools; please refer to the workshop manual for your vehicle.
Needle bearing
The needle bearing has a thin housing and is equipped with a large number of thin needle rollers. This contrasts with, for example, a ball bearing which needs a thicker housing. As a result, the needle bearing can be relatively wide and flat. The needle bearing therefore requires little installation space but still offers a very high load-carrying capacity. Find the right needle bearing type for your vehicle application here.