SKF NATR 12 PPA Support Rollers With Flange Rings With An Inner Ring 12x21x14mm

Description

SKF support rollers are based on needle or cylindrical roller bearings.NATR design support rollers are based on a needle roller and cage assembly. The outer ring is axially guided by pressed-on flange rings, forming a gap-type seal.Includes axial sliding rings made of PA66 on both sides, forming narrow labyrinth seals with the outer ring in a radial direction, to protect against coarse contaminants. They serve as contact seals in an axial direction, to retain grease reliably in the bearing. Improves lubrication conditions in the bearing, keeping friction and frictional heat low, and extending grease life.Support Roller FeaturesAccommodate high radial loads - The thick-walled outer ring enables high radial loads, while reducing distortion and bending stresses.Long service life - The crowned outer ring running surface is beneficial for applications where outer ring tilting relative to the track may occur or where edge stresses need to be minimized.Support rollers without flange rings are based on needle roller bearings. They require adjacent components to guide the outer ring and cage axially.The inner ring is slightly wider than the outer ring, to avoid axial clamping of the outer ring.LubricationSKF support rollers are supplied greased. They should be relubricated regularly to achieve their full service life, even if the initial grease fill still has its full lubricating properties.When used in applications where there are light loads, relatively low speeds and clean surroundings can operate for long periods before relubrication is required. Rollers without a cage, or operated under contaminated and damp conditions at high speeds, or operated at temperatures above 70°, require more frequent relubrication.Bearing DataDimension Standards: ISO 7063 and ANSIABMA Standard 18.1 (where standardised).Profile of the Outer Ring Running Surface: Improved crowned profile for better load distribution, higher stiffness and reduced wear.Tolerances: Normal, width tolerance,