German Baruffaldi bearings, Baruffaldi models, Baruffaldi prices

Baruffaldi roller bearings with cylindrical rollers; relative to their diameter, the rollers are both thin and long. These rollers are called needle rollers. Despite having a small cross-section, the bearings still exhibit high load-carrying capacity. Needle roller bearings are equipped with thin and long rollers (roller diameter D ≤ 5mm, L/D ≥ 2.5, where L is the roller length), resulting in a compact radial structure. When the inner diameter and load capacity are the same as other bearing types, the outer diameter is minimized, making them particularly suitable for support structures with limited radial installation space. Depending on the application, bearings without an inner ring or needle roller and cage assemblies can be selected. In this case, the journal surface of the shaft and the housing bore surface directly serve as the inner and outer rolling surfaces of the bearing. To ensure that the load capacity and operating performance match those of bearings with rings, the hardness, machining precision, and surface quality of the raceway surfaces on the shaft or housing bore must be similar to those of the bearing ring raceways. This type of bearing can only withstand radial loads.

Baruffaldi bearing classification

1) Combined type: Combined needle roller bearings are bearing units composed of radial needle roller bearings and thrust bearing components. They feature a compact structure, small volume, and high rotational precision, allowing them to withstand high radial loads while simultaneously accepting certain axial loads. The product offers diverse structural forms, wide adaptability, and ease of installation. Combined needle roller bearings are widely used in various mechanical equipment such as machine tools, metallurgical machinery, textile machinery, and printing machinery, enabling highly compact and agile mechanical system designs. [2) Thrust type: Thrust bearings consist of thrust cage assemblies containing needle rollers, cylindrical rollers, or balls, along with thrust washers. The needle rollers and cylindrical rollers are retained and guided by the thrust cage. When used with DF thrust bearing washers of different series, many different combinations can be provided for the bearing configuration. The use of high-precision cylindrical rollers (needle rollers) increases the contact length, allowing this bearing to achieve high load capacity and high stiffness in a very small space. Another advantage is that if the surfaces of adjacent parts are suitable as raceway surfaces, the washers can be omitted, resulting in a compact design. The cylindrical surfaces of the needle rollers and cylindrical rollers used in DF thrust needle roller bearings and thrust cylindrical roller bearings are profiled surfaces, which reduce edge stress and improve service life.

Baruffaldi bearing installation

Installation of full-complement needle roller bearings is typically performed using an auxiliary sleeve. In this process, the auxiliary roller or auxiliary sleeve supports the needle rollers to prevent them from falling out. The chamfer of the journal lifts the needle rollers, and as the needle roller bearing moves slowly inward on the journal, the auxiliary roller or auxiliary sleeve gradually withdraws until it reaches the working position. The outer diameter of the auxiliary roller or auxiliary sleeve should be 0.1–0.3mm smaller than the shaft diameter. During installation, first apply grease to the inner surface of the bearing outer ring, place the needle rollers against the inner surface (leaving a gap when inserting the last needle roller), then push the auxiliary roller or auxiliary sleeve (replacing the journal or bearing inner ring) into the outer ring hole. Align its end face with the installation shaft end face or the end face of the bearing inner ring already installed on the shaft, and then apply pressure using a press or hand hammer. Needle roller bearings can also be installed by applying a thin layer of lubricating oil to the outer diameter of the auxiliary sleeve, slipping it into the bearing outer ring to form an annular hole between the auxiliary sleeve and the bearing outer ring, and then installing the needle rollers into this annular hole. After installing the needle rollers, push out the auxiliary sleeve using the working shaft. For needle roller bearings without an inner or outer ring, during installation, first apply a thin layer of grease to the rolling surfaces of the shaft or housing bore, and place the needle rollers sequentially against the grease at the installation site. A gap should be left when placing the last needle roller; the size of the gap around the circumference of the needle roller bearing should ideally be 0.5mm. Do not forcibly squeeze in the last needle roller or install one fewer needle roller, as forced installation may jam the bearing preventing rotation, while installing too few creates excessive gap, easily causing the needle rollers to twist and break during operation. For needle roller bearings with only a stamped outer ring, since the outer ring wall is very thin, do not install by striking with a hand hammer; instead, use a press for insertion. Striking with a hand hammer applies uneven pressure, which can easily cause local deformation of the needle roller bearing's outer ring.

Baruffaldi bearing usage instructions

1) Bearing disassembly and assembly: Clean the bearing thoroughly before installation. During installation, use special tools to press the bearing in evenly and straightly. Do not strike it with a hand hammer; striking the bearing directly is strictly prohibited. If the fit between the bearing ring and the housing bore is loose, repair the housing bore or replace the bearing. Do not attempt to make do by knurling the bearing mating surface or inserting copper shims. When removing the bearing, use an appropriate puller to extract it. Do not strike the bearing with chisels, hand hammers, or similar tools. 2) Bearing lubrication: The common lubricants for rolling bearings are lubricating oil and grease. When the circumferential speed of the shaft is less than 4-5m/s, or in automotive applications where lubricating oil cannot be used, grease lubrication is adopted. The advantages of grease lubrication include a simple sealing structure, minimal grease loss, low sensitivity to temperature changes, and long service life per application. Two points require attention when using grease: First, select the appropriate grease grade according to the vehicle manual. For example, sodium-based grease is not suitable for automotive water pump bearings due to its poor water resistance. Second, add an appropriate amount of grease; generally, filling 1/2-l/3 of the bearing cavity is advisable. Excessive grease is not only useless but also increases operating resistance, causing heating. Pay special attention to automotive wheel hub bearings; "hub cavity lubrication" is recommended, meaning only a moderate layer of grease should be applied to the bearing itself. Otherwise, it not only causes waste and poor heat dissipation but may also cause the grease to overflow due to heat, potentially affecting braking performance. The advantages of lubricating oil lubrication are low frictional resistance and heat dissipation capability; it is mainly used for high-speed bearings and those operating in higher ambient temperatures. Select the lubricating oil grade according to the vehicle manual and replace it promptly according to the maintenance schedule. After draining the old oil, clean the mechanism before adding new oil. Fill the oil to the specified mark or level with the filler port (depending on the specific vehicle structure and requirements); do not overfill.

Weidou Intelligent Technology specializes in selling German Baruffaldi plain bearings, Baruffaldi rolling bearings, Baruffaldi spherical plain bearings, Baruffaldi deep groove ball bearings, Baruffaldi angular contact ball bearings, Baruffaldi self-aligning ball bearings, Baruffaldi thrust ball bearings, Baruffaldi double-direction thrust angular contact ball bearings, Baruffaldi combined bearings, Baruffaldi thrust roller bearings, Baruffaldi needle roller bearings, Baruffaldi insert ball bearings, Baruffaldi spherical roller bearings, Baruffaldi flanged bearings, Baruffaldi linear bearings, all original imports from Germany. Welcome inquiries and orders from users.