Features FAG Super Precision Cylindrical Roller Bearings include solid outer rings, solid inner rings with taper bore (taper 1:12) and cylindrical roller and cage assemblies. The cage material is brass or polyetheretherketone PEEK. Cylindrical roller bearing NN30, the outer ring is movable and can therefore be installed separately from the rest. Cylindrical roller bearing NNU49, inner ring is removable. Double row bearings are used in applications where high accuracy and high radial loads are required. In machine tool applications, they can achieve bearing arrangements with high precision, high radial stiffness and very high load carrying capacity. They provide radial support for the main shaft.
The ideal floating bearing can compensate for the change in length in the rotary motion due to the non-binding force between the roller and the non-ribbed raceway, so the cylindrical roller bearing is particularly suitable for use as a floating bearing. The axial force is borne by the thrust bearing. The NNU49 bearing cylindrical roller bearing with a smaller cross-sectional area has a smaller cross section than other FAG ultra-precision cylindrical roller bearings. Therefore, smaller shaft spacings can be achieved in a multi-spindle arrangement. Also, the diameter range not shown in the dimension table can be agreed upon. Double Row Cylindrical Roller Bearings Cylindrical Roller Bearings NN30 Bearings The rollers are guided by the inner ring. The outer ring has a ground cylindrical profile and can be moved, Figure 1. The NNU49 has a ground, removable cylindrical inner ring. The roller is guided by the outer ring.
Seal this type of cylindrical roller bearing without a seal. Lubrication Due to the high surface quality of raceways and rollers, FAG cylindrical roller bearings are particularly suitable for grease lubrication. Oil lubricated double row bearings have lube grooves and lube holes on the outer ring. When selecting a lubricant, the operating temperature of the lubricant must be taken into account. Depending on the design, radial bearings can in most cases be lubricated by smaller thrust bearings above, see page 57. Operating temperature The bearing operating temperature ranges from –30 °C to +150 °C. The cage material for the cage double row bearing is solid brass (suffix M).
Suffixes of existing designs, see table. The design of the existing design bearing is marked on the end face of the bearing ring, Figure 2. Suffix Description Design S Outer Ring with Lube and Lubrication Hole Standard Design AS Outer Ring with Lube and Lubrication Hole, Series NN30 K Cone Hole, Taper 1:12 M Brass Cage, Roller Guide SP Accuracy SP and Internal radial clearance C1NA C2 Internal radial clearance According to the standard special design, UP ultra-high precision and internal radial clearance C1NA can be supplied through the agreement R40-50 individual internal radial clearance H74 high running accuracy.
没有评论:
发表评论