FAG cross roller bearing load torque speed preload characteristics

Characteristics FAG cross roller bearings are high in rigidity and have better running accuracy than P4. Other precisions are P5 and they are preloaded. The outer ring of the bearing can be easily fixed to the surrounding structural parts with a gland. The internal structure of the cross roller bearing introduced here is particularly suitable for high speed conditions and is suitable for vertical hexagonal lathes. Compared with the high-precision bearings in the TPI120 bearing composite load, the same size cross-roller bearings have a higher rated dynamic load. With less rollers, stiffness is relatively reduced. These guidelines and data mainly target the list of cross-roller bearings. The outer ring rotates while the bearing is working. For radial loads and moments with axial loads Due to the O-arrangement of the cylindrical rollers, the bearings can withstand axial and radial loads, overturning moments and other compound loads, but only occupy one bearing space. Therefore, the design scheme of the two bearing arrangements can be replaced with a single bearing arrangement, as shown in FIGS. 1 and 2 . Fa = Axial load Fr = Radial load Mk = Overturning moment Fig. 1 Arrangement of two bearings 00017B7C Crossed roller bearings Fig. 2 uses only one cross roller bearing arrangement.


  THK cross roller bearing limit speed The limiting speed of a bearing is determined by the way the bearing is lubricated (grease and lubricant), see the dimension tables. If other speed limits are required, contact the Schaeffler Group Engineering Services. Preloading For the INA cross roller bearing Z-556, the pretensioning of the bearings is already established in the production plant. The bearing rings are fixed by end caps and bolts. For the cross-rolling seed bearing Z-549, the actual height record of the bearing inner ring will follow the bearing. The required preload is achieved by adjusting the clearance between the inner rings of the bearing. The gap between the bearing inner ring is adjusted by adjusting the spacer between the shaft end face and the end cap end face. It is recommended to adjust the thickness of the spacer as follows. To initially determine the thickness of the gasket, the first step is to make a gasket. The gasket should be slightly thicker to ensure a clearance of 0.25 mm to 0.5 mm. This provides a measurable axial play. The initial thickness of the gasket X1 is calculated as follows: the initial thickness of the X1 mm gasket, Figure 3 The width of the inner ring of the Bi mm bearing can refer to the inspection table L mm The depth of the inner ring support base s mm Reserve gap height, s = 0.25 mm to 0.5 mm. Figure 3 Initial shim thickness for bearing arrangement X10017746 Schaeffler Group Industrial TPI 205 63 Determining the thickness of the required shim After measuring the axial play, the shim thickness X can be finalized. The axial clearance of the bearing can be obtained by lifting the outer ring of the bearing and the surrounding structural members and measuring their movement. Determine the thickness of the gasket: Determine the preload: Required gasket thickness for X mm, Figure 4 Initial thickness of X1 mm gasket A mm Measured axial clearance V mm Preload FV kN Preload, Recommended value is 3.5% rating Dynamic load CCs kN0.926/mm axial elasticity coefficient, please refer to the dimension table. Figure 4 Bearing arrangement and gasket thickness X.