国 上海久通大学 Types of Ball Bearings ▣Double Row/Deep Groove BB(双列深沟球轴承) >Add another row to increase load capabilities >Greater load capabilities than SRDG >Smaller space requirement than 2 SRDG >More misalignment problems 图 上酒充通大学 Types of Ball Bearings 口Sef-aligning BB(自动调心球轴承) >Spherically ground outer race allows for alignment flexibility >Reduced load bearing capabilities,with minimal thrust loading 11
11 Types of Ball Bearings Double Row/Deep Groove BB（双列深沟球轴承） Add another row to increase load capabilities Greater load capabilities than SRDG Smaller space requirement than 2 SRDG More misalignment problems Self-aligning BB（自动调心球轴承） Types of Ball Bearings Spherically ground outer race allows for alignment flexibility Reduced load bearing capabilities, with minimal thrust loading
国 上海久通大学 Types of Ball Bearings 口Angular Contact BB(角接触球轴承) >One side of each race is higher >Can accommodate a larger thrust load >Force resultant preferred between 15 and 40 F Fa 国上清通大学 Types of Ball Bearings 口Angular Contact BB(角接触球轴承) -8- Indirect arrangement 12
12 Angular Contact BB（角接触球轴承） One side of each race is higher Can accommodate a larger thrust load Force resultant preferred between 15º and 40º Types of Ball Bearings Fr α Fa Types of Ball Bearings Angular Contact BB（角接触球轴承） Indirect arrangement
国 上海久通大学 Types of Ball Bearings 口Angular Contact BB(角接触球轴承) Direct arrangement 国 上酒文通大学 Indirect and Direct mounting Indirect mounting provides greater rigidity when pair of bearings is closely spaced:front wheel of a car,... ▣ Direct mounting provides greater rigidity when pair of bearings is not closely spaced:transmission,speed reducers,rollers,.. Indirect mounting Direct mounting 13
13 Types of Ball Bearings Angular Contact BB（角接触球轴承） Direct arrangement Indirect and Direct mounting Indirect mounting Direct mounting Indirect mounting provides greater rigidity when pair of bearings is closely spaced: front wheel of a car, … Direct mounting provides greater rigidity when pair of bearings is not closely spaced: transmission, speed reducers, rollers,.. FR Fr1 Fr2 FS1 FS2 FR Fr2 FS1 Fr1 FS2
国 上海久通大学 Types of Ball Bearings ▣ Thrust BB(推力球轴承) >Large axial loading capabilities >Shaft speeds must be kept low because of centrifugal forces crew 图 上酒充通大学 Types of Roller Bearings 口Cylindrical(Straight)RB(圆柱滚子轴承) > Greater radial load capacity > Theoretical line contact(actually a rectangle),so lower contact stresses >Do not use for thrust-causes rubbing not rolling >Fair misalignment ability NJ angle N NU NJ NUP ring HJ 外圖无挡边 内圈无挡边 内圜单挡边 内屬单挡边 内圈雕挡边 并带平挡圈 并带斜挡墨 14
14 Types of Ball Bearings Thrust BB（推力球轴承） Large axial loading capabilities Shaft speeds must be kept low because of centrifugal forces Types of Roller Bearings Cylindrical (Straight)RB （圆柱滚子轴承） Greater radial load capacity Theoretical line contact (actually a rectangle), so lower contact stresses Do not use for thrust - causes rubbing not rolling Fair misalignment ability 外圈无挡边 内圈无挡边 内圈单挡边 内圈单挡边 并带斜挡圈 内圈单挡边 并带平挡圈
国 上海久通大学 Types of Roller Bearings 口Needle RB(滚针轴承) >Roller with small diameter > Small d,makes them radially compact,good for large radial loads at high speeds Thrust capabilities and misalignment poor 图 上酒充通大学 Types of Roller Bearings 口 Tapered RB(圆锥滚子轴承) > Combine advantages of straight roller and ball type bearings >Can accommodate radial and axial loading >High load capabilities Bearings mounted in opposed pairs Back to back Face to face (O errengement) (X arrangement) More rigid mounting More flexible mounting 15
15 Needle RB （滚针轴承） Roller with small diameter Small d, makes them radially compact, good for large radial loads at high speeds Thrust capabilities and misalignment poor Types of Roller Bearings Tapered RB(圆锥滚子轴承) Combine advantages of straight roller and ball type bearings Can accommodate radial and axial loading High load capabilities Types of Roller Bearings