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One article to know about bearing cages
Bearing cage, also known as bearing retainer, refers to the bearing parts that partially wrap all or part of the rolling elements and move with them to isolate the rolling elements, and usually also guide the rolling elements and keep it in the bearing.The main functions of bearing cage:1. Keep a proper distance between the rolling elements to prev... Bearing cage, also known as bearing retainer, refers to the bearing parts that partially wrap all or part of the rolling elements and move with them to isolate the rolling elements, and usually also guide the rolling elements and keep it in the bearing.The main functions of bearing cage:1. Keep a proper distance between the rolling elements to prevent the rolling elements from contacting each other to reduce friction;2. Make the rolling elements evenly distributed, so that the load is evenly distributed;3. Guide the rolling elements in the no-load area to improve the rolling conditions in the bearing and prevent damaging sliding.Types of bearing cagesBearing cage is divided into stamped cage, solid cage and pillar cage.1. The advantages of stamped cage are light weight and large inside space, which can facilitate the entry of lubricant.2. The solid cage can usually allow a higher speed. When the bearing has other forms of movement at the same time, especially at high speed, a machined metal cage should also be used;3. The pillar cage is lighter and can accommodate more rollers. It is only used for extra large roller bearings.Materials of bearing cagesThe cage materials mainly include stamped steel, machined steel, stamped brass, machined brass, polymeric materials, etc.The stamped steel cage has high strength, which can reduce friction and wear through surface treatment.Machined steel cages are generally used for extra large bearings or when brass cages are not suitable.Stamped brass cages are used for small and medium-sized bearings.Machined brass cages are generally not affected by bearing lubricants and can be cleaned with ordinary lubricants. Brass cages should not be used at operating temperatures above 250 ° C.Compared with metal cages, cages made of polymeric materials (nylon 66, nylon 46) have many advantages such as good toughness, excellent friction and wear resistance, high impact resistance, acid resistance and corrosion resistance, etc.  View Details
Signs That You Need To Change Washing Machine Bearings
1. Noise After long operation of washing machine, the bearings in the drum are eventually going to wear out. You can tell this immediately when you hear noise appearing from the drum during the operation. You can do a quick inspection of the drum. 2. Oil stains on the clothes If there are oil on the clothes after each washing cycle, it means ... 1. Noise After long operation of washing machine, the bearings in the drum are eventually going to wear out. You can tell this immediately when you hear noise appearing from the drum during the operation. You can do a quick inspection of the drum. 2. Oil stains on the clothes If there are oil on the clothes after each washing cycle, it means that your main seal on the bearings is also worn and should be replaced. Despite this, you'd better change the bearings as well since they could collapse. It's important to remember to put the right seal around each bearing as well. The wrong seal could end up leaking water on the new bearings, hence causing part failure once again. Products features of Washing Machine Bearings: · Bearing supported, shipped grease lubricated and protected against dust larger than .012" (.3mm) diameter. · Available with additional lip seals (- 2RS) for enhanced sealing, as well as, with a keyway on the inner ring (-P) or the inner and outer ring (-PP) for additional ease of installation. · Operating temperature: 21 to 140°F (-6 to 60°C) · Special grease available for operating temperatures: -40 to 212°F (-40 to 100°C) Contact Person: Mr.Dong Address: No.1 Jilin Road, Luoyang City,Henan Province,China Zip:471039 Tel: +86-379-6488 1209 Fax: +86-379-6488 1529 Mobile No:+86 139 3792 3793 Website: www.zys.com.cn              www.zysbearing.com E-mail: zysdong@gmail.com View Details
The main cause of damage to the cage of the rolling bearing
1.Vibration When the bearing is under vibration, the force inside the bearing may cause fatigue cracks in the cage. Gradually, this crack will cause the cage to rupture. To prevent this, bearings with special cages can be used. 2.The speed exceeds the design requirements If the bearing is running at a speed which the cage can not hold, the inert... 1.Vibration When the bearing is under vibration, the force inside the bearing may cause fatigue cracks in the cage. Gradually, this crack will cause the cage to rupture. To prevent this, bearings with special cages can be used. 2.The speed exceeds the design requirements If the bearing is running at a speed which the cage can not hold, the inertial force will cause the cage to rupture. There are high speed bearings manufactured specifically for this type of use. 3.Wear Improper lubrication or hard foreign objects can cause wear on the bearing cage. Sliding friction is most likely to occur when the rolling bearing is running. However, the sliding contact between the roller and the cage is usually not eliminated, so if the lubrication is poor, the cage is the first part which will be worn. Moreover, the cage is made of a softer material, so the wear is quite fast. Gradually the gap of the cage will cause the cage to break quickly. The same happens when hard particles penetrate the bearing. 4.Foreign matters stuck The particles of parts may be stuck between the cage and the roller, which will prevent the rolling elementg from rolling and then cause the cage to break. As long as it can prevent large foreign objects from intruding into the bearing, the cage can be safe even in heavy load. View Details
Slewing bearing (turntable bearing) selection calculation method
Slewing bearing (turntable bearing) Selection calculation method: Static reference load Fa 'and M' calculation method Single row four point contact ball Single-row four-point contact ball slewing bearing selection calculation according to the bearing angle of 45 ° and 60 ° two cases. I, a = 45 ° Ⅱ, a = 60 ° Fa '= (1... Slewing bearing (turntable bearing) Selection calculation method: Static reference load Fa 'and M' calculation method Single row four point contact ball Single-row four-point contact ball slewing bearing selection calculation according to the bearing angle of 45 ° and 60 ° two cases. I, a = 45 ° Ⅱ, a = 60 ° Fa '= (1.225 • Fa + 2.676 • Fr) • fs Fa' = (Fa + 5.046 • Fr) • fs M '= 1.225 • M • fs M' = M • fS Then find the above two points on the graph, one of which can be below the curve. Single row crossed roller type Fa '= (Fa + 2.05 • Fr) • fs M '= M • fs Double row different diameter ball For double-row reduced-diameter ball slewing bearing selection calculation, Fr ≤ 10% Fa, Fr negligible. When Fr> 10% Fa, we must take into account changes in the pressure angle of the raceway, the calculation, please contact us. Fa '= Fa • fs M '= M • fs Three-row roller When selecting three-row roller slewing bearing, only the effect of axial roller load and overturning moment is calculated. Fa '= Fa • fs M '= M • fs On January 1, 2008, the National Development and Reform Commission promulgated a new standard of slewing bearing with the participation of our company. 1. By JB / T 10837-2008 "construction machinery and equipment three rows of column slewing bearings" instead of JG / T 68-1999 "three rows of columnar construction machinery slewing ring"; 2. By JB / T 10838-2008 "Construction machinery and equipment single row cross roller (cone) slewing bearing" instead of JG / T 67-1999 "single row crossed roller bearings (construction machinery)", the new standard to cancel the original Appendix 1 "Supplement Series of specifications "; 3. By JB / T 10839-2008" construction machinery and equipment single volleyball slewing ring "instead of JG / T 66-1999" single row ball slewing ring for construction machinery ", the new standard to increase the overlap section configuration, Cancel some of the less common specifications, the new part of the specification, increased to 48; to cancel the original Appendix A "Supplementary Series Specifications"; performance curve by d0 ≤ 40,57 HRC, d0 ≥ 50,55 HRC drawing. Three new standards have abolished product quality grading, since July 1, 2008 onwards. View Details
The performance of lubrication-free bearing materials
The lubrication-free bearing has the characteristics of high carrying capacity, impact resistance, high temperature resistance and strong self-lubricating ability. It is especially suitable for heavy load, low speed, reciprocating or swinging, etc., which is difficult to lubricate and form an oil film. It is also not afraid of water and other acid ... The lubrication-free bearing has the characteristics of high carrying capacity, impact resistance, high temperature resistance and strong self-lubricating ability. It is especially suitable for heavy load, low speed, reciprocating or swinging, etc., which is difficult to lubricate and form an oil film. It is also not afraid of water and other acid liquids. The lubrication-free bearing products have been widely used in metallurgical continuous casting machines, rolling equipment, mining machinery, molds, lifting machinery, textile machinery, wind power generation, ships, steam turbines, hydraulic turbines, injection molding machines and equipment production lines. Superior performance of lubrication-free bearing materials:   1. Extremely high wear resistance, very low wear rate   2. Good self-lubricating performance and low friction coefficient   3. High impact strength and good toughness.   4. Excellent chemical resistance, resistant to almost all acid-base media   5. Non-toxic, tasteless, no exudate   6. It has elasticity and shock absorption; it has good self-recovery and low water absorption.   7. Good mechanical properties, can withstand large impacts and loads, and can effectively protect other components from mechanical damage due to its excellent toughness.   8. Excellent low temperature resistance. It is not brittle even at -176 ° C. View Details
Rotational accuracy of rolling bearings
Rotational accuracy of rolling bearings refers to: 1. Radial runout of the inner ring and outer ring of the bearings; 2.The runout of bearing inner ring and outer ring end face to the raceway; 3. The runout of the inner ring datum end face to the inner diameter; 4. The amount of change of the outer surface line to the inclination o... Rotational accuracy of rolling bearings refers to: 1. Radial runout of the inner ring and outer ring of the bearings; 2.The runout of bearing inner ring and outer ring end face to the raceway; 3. The runout of the inner ring datum end face to the inner diameter; 4. The amount of change of the outer surface line to the inclination of the datum end face; 5.The amount of change of the thrust bearing raceway to the bottom thickness. Symbols and definitions: 1.The radial runout of the bearing: Kia-The radial runout of the inner ring of the bearings. It means the difference between the maximum and minimum distance between the inner diameter surface and the fixed point of the outer ring when the inner ring is at different angular positions; Kea-The radial runout of the outer ring of the bearings. It refers to the difference between the maximum and minimum distances between the outer diameter surface and the fixed point of the inner ring when the outer ring is at different angular positions. 2. The runout of the bearing end face to the raceway Sia - The runout of the bearing inner ring end face to the raceway. It means the maximum and minimum axial distances between the datum end face of the inner ring and the fixed point  of the outer ring when the inner ring is at different angular positions. Sea-The runout of the bearing outer ring end face to the raceway. It means the maximum and minimum axial distances between the datum end face of the outer ring and the fixed point of the inner ring when the outer ring is at different angular positions. 3. Sd - The runout of the datum end of the bearing inner ring against the inner diameter. View Details