T-Blog, Your Bearing Wikipedia

Slewing bearings usually have a diameter ranging from 0.2 to 10 meters. They consist of mounting holes, internal or external ring gears, lubricating oil holes, and sealing devices. The mounting holes are divided into through holes and threaded holes. Different for different industries The slewing bearing has a variety of structural types to meet its requirements, and can meet the needs of the main engine function with different manufacturing accuracy levels. Therefore, the slewing bearing is an indispensable machine on the slewing device of medium and large construction machinery slewing bearing. component. It plays an important role in the machinery industry, construction industry, coal industry and shipbuilding industry. The slewing bearing has toothless type, external tooth type and internal tooth type. The structure types slewing bearing generally include single-volley, double-volley, cross-roller, three-row roller, ball-column combined and other forms, of which single-row ball The slewing bearing has a relatively low cost and excellent overall performance. The double volleyball slewing bearing has certain advantages in service life, strong bearing capacity, small swing resistance, large allowable wear, and strict requirements for the mounting base. Raceway rotation accuracy is low; Crossed roller slewing bearings have high accuracy, long life, and high dynamic load capacity, but have high…

Slewing Bearing, also known as slewing ring bearing, turntable bearing, slewing ring, etc, is widely used in modern industries. Types of Slewing Bearing Single-row ball type (01 series, HS series, Q series)Double-row ball type (02 series)Three-row roller type (13 series)Single-row cross roller type (11 series)Double-row ball type (07 series) )Light and non-standard specifications series slewing bearing Manufacturing Processing Raw material inspection Chemical composition analysis Heat treatment Raceway hardness inspection Gearing processing Gear inspection CNC drilling processing Mounting hole inspection Turning processing Raceway inspection Assembly Finished product inspection Qualified stock In the entire cycle of slewing bearings from forgings to finished products to the hands of customers, the tooth processing technology takes the longest time, and the length of the delivery period depends greatly on the timeliness of the slewing gear processing. Hobbing machining accounts for about 45% of the entire slewing bearing processing volume, or even a larger proportion. For large diameter and large modulus slewing bearing machining, milling gear machining also reflects the characteristics of good machining accuracy, high efficiency, and convenient programming. In recent years, in order to adapt to the improvement of machining precision and production efficiency requirements of slewing bearing processing, the hobbing technology has continuously…

Its construction is simple and cost-effective. The N/O linear guideway assumes the task of being the lateral linear guideway for the table. As the surface guideway is adjusted level with the N/O, the linear guideway systems can be interchanged – depending on whether the grinding  spindle is mounted to the right or left.

The majority of angular contact bearings use phenolic type cages and these are exceptional good for a wide range of conditions and particularly for high-speed since they are outer ring located. However, there are advantages to using TYN cages in certain applications, particularly in grease lubrication. TYN is a polyamide material and this cage is designed to be ball guided. Reduced Cage Noise In certain applications cage noise can occur in grease lubricated bearings. This is due to friction between the ballsurface and the cage guide surface; this can be particularly noticed in cold conditions. The TYN cage design eliminates this due to the very low friction quality of the material and good vibration absorption characteristics as well as improvements in the cage shape. The test data up shows the comparison of the Phenolic and Polyamide cage: Longer Grease Life-Shorter ‘Running In’ Time Grease life is longer because there is more internal space for the grease to collect in and because the grease can clear the rotating parts more quickly, the running in time is reduced Cage Guiding Contact: More grease space with TYN. Less grease pushed out of bearing, therefore, longer life. Shorter running in time compared to Phenolic…

No one knows who invented the planetary gearbox, but it has been in use since the 15th century.Planetary Gearboxes is an old mechanics fundamental that is still being used for new eading innovative technology like 3D printing, and new methods of transport. Planetary gearbox consist of an internal toothed ring gear to which are set 3 planets mounted on the planet carrier engaging also with the sun gear and reduced output speed is taken through planet carrier and ring gear is remain stationary.Output shaft maintaining the same direction of rotation as Input. How bearing behavior in a planetary gear : Salient Features of Planetary Gearbox: High reduction ratios, high-efficiency long Life, space-saving compactness, higher overload capacity, reliable service, greater stability, compact and co-Axial sturdy,no-self locking property,load distribution among planetary gears. Needle roller bearing is used in the planetary gear mechanism used in the advance/retraction switching mechanism of the CVT.While a large centrifugal force is generated in the planetary gear during high-speed operation an extended service life and a small torque are realized through adoption of the special heat treatment shaft and cage and rollers of a strong retainer. TBB Needle roller bearing have the features of low cross section and…

/..: Standardized rolling bearings with uncoded inner diameters A: Single row angular contact ball bearing with 30° contact angle AC: Single row angular contact ball bearing with 25° contact angle ACD: Single row angular contact ball bearing, optimised internal design, 25° contact angle ADA: Double row full complement cylindrical roller bearing with wide snap ring grooves in outer ring, two inner ring halves held together by U-shaped retaining ring AS: Needle roller bearing with lubrication hole(s) in outer ring. A figure following the AS indicates the number of holes ASR: Needle roller bearing with annular groove and lubrication hole(s) in outer ring. A figure following the ASR indicates the number of holes Axx(x): A combined with a two or three-figure number identifies variants of the standard design, which cannot be identified by generally applicable suffixes B: Deviating or modified internal design with same boundary dimensions. As a rule the significance of the letter is bound to the particular bearing or bearing series Examples: 7210 B Single row angular contact ball bearing with 40° contact angle 32210 B Taper roller bearing with steep contact angle (steeper than 32210) BE: Single row angular contact ball bearing with 40° contact angle and optimised…

Key Factors of Electric Motor Bearing Design –Outline dimensions–Load size and direction–Speed requirements, constant/variable/high–Material of motor shaft and housing–Power take-off transmission form–Motor installation form–Vibration level requirements–Noise level requirements–Temperature requirements–Bearing life–Lubrication form–Maintenance–Condition monitoring–Sealing and protection Common Configuration of Electric Motor Bearing –Horizontal Motor 1. DGBB+DGBBCross positioning configuration, suitable for small and medium-sized motors, low maintenance requirements, axial guidance is not a key parameter, non positioning bearings have spring preloading2. Sealed DGBB + CRBSuitable for large motors, with heavy load on the drive side and axial expansion inside the bearing3. CRB + A pair of Angular Contact Ball Bearing Face to FaceFor motors with bidirectional axial load and heavy radial load, or for occasions with strict requirements on axial displacement4. DGBB + A pair of Angular Contact Ball Bearing Face to FaceIt is used for small motors with axial load and moderate radial load, or for occasions with strict requirements on axial movement. Deep groove ball bearing is with spring preload5. CRB + CRB & DGBBFor large motors. The deep groove ball bearing is free in radial direction, and the O-ring is used to prevent the outer ring from rotating6. SRB + SRBFor extra large motors and heavy load occasion –Vertical Motor 1. DGBB + DGBBFor small and medium-sized…