Product: Singlerow cylindrical roller bearings (bearing steel) Models: N224M, NU224M, NJ224M, NF224M, NUP224M, RN224 (see RN224 notice) Dimensions (standard models N224M, NU224M, NJ224M, NF224M, NUP224M): Inner diameter (bore): 120 mm Outer diameter: 215 mm Width (thickness): 40 mm Key benefits Long service life: made from bearing steel for durable performance and extended operating intervals. Smooth, lownoise operation: precision rollers and raceway contact reduce vibration and audible noise. Reliable radial support: singlerow cylindrical roller design delivers consistent radial load capacity and accurate shaft guidance. Easy installation on conventional shafts: straight bore design fits standard cylindrical shafts without special adapters. Low maintenance when properly lubricated: supports oil or grease lubrication to maintain performance and reduce wear. Important functional and compatibility notes Lubrication required: please add lubricating oil or grease before and during use to ensure proper function and longevity. Straight bore: intended for fitting on a conventional cylindrical shaft; confirm shaft diameter matches the 120 mm bore. Modelspecific outer diameter: N224M, NU224M, NJ224M, NF224M, NUP224M use the specified 215 mm outer diameter. RN224 does not include an outer ring; therefore RN224's outer diameter is not 215 mm — verify RN224 dimensions separately before ordering or installing. Performance and material Material: bearing steel for strength, wear resistance, and long life. Design: singlerow cylindrical rollers provide smooth rotation and low friction under radial loads. Noise and vibration: precision geometry helps minimize operating noise for quieter machinery. Use scenarios / applications Industrial gearboxes and reducers: supports radial loads in transmission assemblies where smooth, lownoise rotation is required. Rollers and conveyor systems: fits conventional cylindrical shafts to provide durable, lowmaintenance rotational support for rollers and idlers. Motor and pump applications: suitable for shaftmounted motors or pumps where reliable radial guidance and reduced vibration improve service life. Installation and maintenance tips Confirm model and dimensions before installation (check RN224 special case). Apply appropriate lubricating oil or grease prior to first run and maintain lubrication schedule per operating conditions. Ensure shaft diameter and housing allow proper seating of the straight bore bearing to avoid misalignment or premature wear. Models summary N224M, NU224M, NJ224M, NF224M, NUP224M: inner = 120 mm, outer = 215 mm, thickness = 40 mm. RN224: no outer ring included; outer diameter differs from 215 mm — verify actual dimensions for RN224. This product provides a durable, lownoise cylindrical roller bearing solution for applications requiring reliable radial support on conventional cylindrical shafts.