German Hanchen bearings, Hanchen models, Hanchen prices

Hanchen 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, one may select bearings without inner rings or needle roller and cage assemblies. 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 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. Such bearings can only withstand radial loads.

Hanchen bearing selection

When selecting bearings, the main factors to consider are as follows: 1) Bearing load: The magnitude, direction, and nature of the load on the bearing are primary factors in selection. When selecting based on load magnitude, compared to the point contact in ball bearings, the main components in roller bearings have line contact, making them easier to use for heavy loads with less deformation after loading. When selecting based on load direction, thrust bearings are generally chosen for pure axial loads. Thrust roller bearings are selected for larger axial forces, while thrust ball bearings are chosen for smaller axial forces. For pure radial loads, deep groove ball bearings, cylindrical roller bearings, or needle roller bearings are generally used. When subjected to radial loads along with small axial loads, deep groove ball bearings or tapered roller bearings may be selected; when axial loads are large, angular contact ball bearings with larger contact angles or tapered roller bearings may be used. 2) Bearing speed: Generally, speed does not significantly affect the choice of bearing type, but when speeds are high, speed must be included in the selection criteria. Compared to roller bearings, ball bearings have higher limiting speeds, so ball bearings are preferred in high-speed conditions. For the same inner diameter, a smaller outer diameter means smaller rolling elements, resulting in less centrifugal force on the outer ring raceway, making them more suitable for high-speed operation. According to the properties given in Table 1, needle roller bearings are relatively suitable for high-speed operation. 3) Bearing self-aligning performance: When the shaft centerline does not coincide with the bearing housing centerline, causing angular errors, or when the shaft bends or tilts under load, misalignment of the inner and outer ring axes occurs. In such cases, self-aligning bearings with certain self-aligning capabilities or mounted spherical ball bearings should be used. Roller bearings are most sensitive to misalignment, and their load capacity in misaligned states may be lower than that of ball bearings. Therefore, such bearings should be avoided when shaft stiffness and bearing housing support stiffness are low, or when large deflection moments are present. 4) Bearing installation and disassembly: When the bearing housing has no split plane and components must be installed and removed axially, separable inner and outer ring bearings (such as N0000, NA0000, 30000, etc.) should be prioritized.

Hanchen bearing lubrication methods

Lubrication is critically important for bearings. Lubricants in bearings not only reduce frictional resistance but also dissipate heat, reduce contact stress, absorb vibration, and prevent rust. Common lubrication methods for bearings include oil lubrication and grease lubrication. Solid lubricants are also used. The choice of lubrication method depends on the bearing speed. The dn value of the bearing (d is the bearing inner diameter in mm; n is the bearing speed in r/min) is generally used to indicate the bearing speed magnitude. The figure shows the dn value limits for grease lubrication and oil lubrication.

Hanchen bearing installation methods

Before starting the assembly of rolling bearings, the rolling bearings must first be cleaned to keep them clean and tidy; then the rolling bearings should be inspected and assembled according to their assembly requirements. 1) First, remove residual grease and anti-rust oil from the rolling bearings. 2) Rinse the rolling bearings with kerosene, then wash with gasoline, and dry with a clean cloth. 3) Other cleaning agents may also be used to clean the bearings, wiping them dry with a cloth. 4) Remember, do not use dirty oil, dirty cloths, or cotton waste to clean or dry the bearings. Principles of rolling bearing assembly: Depending on the bearing structure, size, operating conditions, and fit characteristics of the bearing components, assembly pressure should be applied directly to the end face of the ring to be fitted; transmitting pressure through the rolling elements is not permitted. Rolling bearing assembly generally includes press-fit assembly, thermal expansion/contraction assembly, and power frequency induction heaters. 1) Rolling bearings should not be removed from components unless necessary; if removal is required, correct tools and methods should be used. 2) Before assembling rolling bearings, select appropriate cleaning agents and methods to clean them thoroughly based on the bearing's anti-rust method. 3) Before assembly, use internal and external micrometers to check the inner diameter of the bearing rings and the diameter of the shaft journal; the fit tolerance must comply with drawing requirements. 4) When rolling bearings are installed in split bearing housings, there should be no gap between the bearing cover and the housing mating surface, but a certain gap should be left at the parting lines on both sides of the bearing outer ring and housing. The side gap at the parting line can be measured and checked with a feeler gauge. If the gap is too small or "binding" occurs, scrape with a scraper to increase the gap, complying with the table "Clearance between Rolling Bearings and Split Bearing Housings." 5) Rolling bearing assembly methods include driving-in, press-fitting, and hot mounting. For the driving-in method, use a copper rod or sleeve as a force transmission tool during hammering to ensure symmetrical force application on the bearing. The press-fit method uses a press instead of hammering, still utilizing a sleeve to transmit force. During hot mounting, direct heating with flame is strictly prohibited; use hot oil heated to 80~90℃. Oil temperature should not exceed 100℃. The bearing must not contact the bottom of the heating oil tank; suspend the bearing in the middle of the oil layer to avoid local overheating causing annealing. Heating time must not be less than 15min, allowing the inner ring to expand to the required dimension before assembly. Do not pause during the hot mounting process; quickly install the bearing to the correct position in one go. If the bearing's steel ball cage is made of oil-resistant plastic, water heating is preferable, but moisture must be wiped dry promptly after assembly. 6) Rolling bearing assembly must meet the following requirements: Inspect cleaned bearings; they must be free of damage and rust, rotate flexibly without abnormal noise. Verify the fit category and dimensions between the bearing, shaft journal, and bearing housing; proceed with assembly only if requirements are met. During assembly, pressure applied to the bearing must be evenly distributed and perpendicular to the end face; unilateral force application is prohibited. Select the force application point based on the assembly relationship; for example, when mounting a bearing onto a shaft journal, pressure should be applied to the bearing inner ring. During assembly, ensure the bearing fits tightly against the shaft shoulder. The gap between tapered roller bearings/angular contact bearings and the shaft shoulder must not exceed 0.05mm; for other bearings, it must not exceed 0.1mm. Bearing covers and retaining rings must be flat and evenly tight against the bearing end face, adjusting the clearance as specified in technical documents. During assembly, orient the end of the bearing marked with specifications outward for easy inspection and replacement. After assembly, manually rotate to check for binding, then add an appropriate amount of grease. Sealing devices must be assembled as prescribed; no oil leakage is allowed after sealing. For single-row, double-row, and four-row tapered roller bearings and angular contact bearings, check axial clearance during assembly and adjust according to bearing standards or technical documents. Various radial bearings, needle roller bearings, and spiral roller bearings must rotate flexibly after assembly. For bearings using grease, inject clean lubricating grease filling 65%~80% of the cavity volume into the bearing cavity after assembly; do not inject grease into bearings using oil lubrication. When assembling bearings, the adjusted axial clearance and axial preload (axial interference fit) must comply with bearing standards or equipment technical documents.

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