TAILIEUCHUNG - Industrial Machinery Repair Part 4

Tham khảo tài liệu 'industrial machinery repair part 4', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Bearings 89 Shaft speed rpm Figure Guide to selecting ball or roller bearings Ball Bearings Common functional groupings of ball bearings are radial thrust and angular-contact bearings. Radial bearings carry a load in a direction perpendicular to the axis of rotation. Thrust bearings carry only thrust loads a force parallel to the axis of rotation tending to cause endwise motion of the shaft. Angular-contact bearings support combined radial and thrust loads. These loads are illustrated in Figure . Another common classification of ball bearings is single-row also referred to as Conrad or deep-groove bearing and double-row. Single-Row Types of single-row ball bearings are radial nonfilling slot bearings radial filling slot bearings angular contact bearings and ball thrust bearings. Radial Nonfilling Slot Bearings This ball bearing is often referred to as the Conrad-type or deep-groove bearing and is the most widely used of all ball bearings and probably of 90 Bearings a Radial load b Thurst load c Combination load Figure Three principal types of ball bearing loads Figure Single-row radial nonfilling slot bearing all antifriction bearings . It is available in many variations with single or double shields or seals. They sustain combined radial and thrust loads or thrust loads alone in either direction even at extremely high speeds. This bearing is not designed to be self-aligning therefore it is imperative that the shaft and the housing bore be accurately aligned Figure . Figure labels the parts of the Conrad antifriction ball bearing. This design is widely used and is versatile because the deep-grooved raceways permit the rotating balls to rapidly adjust to radial and thrust loadings or a combination of these loadings. Radial Filling Slot Bearing The geometry of this ball bearing is similar to the Conrad bearing except for the filling slot. This slot allows more balls in the complement and thus can Bearings 91 Outer ring Inner ring Corner radius

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