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Ball Bearing - Cylindrical Roller Bearings
Rolling bearings are designed to carry loads by placing rollers or balls between the inner and outer bearing rings of the apparatus, thus providing a smooth sliding mechanism with very little resistance. Their advantage lies in the utmost optimization of weight, cost, load-capacity and durability. Cylinder roller bearings are characterized by their particular design in which cylinders, as opposed to balls are used as rolling mechanisms, maximizing the radial load capacity and performance speed. They are particularly designed to carry large quantities of radial loads at a relatively high speed. However, this often comes at the cost of a frictional increase.
Engineering & Design
The rollers are carefully designed to distribute loads across the surface area via linear contact with the mechanism's outer ring. The rollers thus glide onto the raceways and allow for axial movement with the assistance of ribs placed either on the inner or outer rings, depending on the selected model. The increase in number of rollers is directly correlated with an increase in the mechanism's performance speed.
The rings and rollers are often made from alloy steel in order to yield maximum durability. In order to hold a high acceleration speed and strong carrying capacity, these types of bearings are most typically supplied with a pressed steel or machined brass cage (although polyamide cages are also available in selected models).
Ample Range of Model Availability
Cylindrical roller bearings are available in a number of different models and configurations with a range of cage designs, dimensions, and side rib applications. They are classified according to the following categories:
Single-Row cylindrical roller bearings - These have a single caged cylindrical roller bearing. They are typically available in different models, with or without side ribs, engineered to accommodate for multiple applications. Single-row models are typically sub-categorized into N, NU, NJ, NF, NP, and NUP designs. The difference between these classifications lies primarily in the number and location of the side ribs. These contribute to the speed and amount of friction exerted at the time of usage.
Double-row cylindrical roller bearings: These have an augmented strength and radial capacity due to their double-row configuration. These two-row cylinder bearings are highly rigid and are mainly used for precision machine tools. Double-row cylindrical models are typically sub-categorized into NN and NNU models. The difference between these designs lies primarily in the number and location of the side ribs, which contribute to the speed and amount of friction exerted at the time of usage.
Multi-row Cylindrical roller bearings - These are built with four or eight roller rows, and are advantageous due to their high radial load capacity, yet lag behind other models in their thrusting capacity. They are primarily aimed at the metal rolling industry due to their ability to carry heavy loads of steel, aluminum and other rolling mills.
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