R2000 Bearings Overview

Royersford R2000 Mounted Spherical Bearings are suitable for a wide variety of applications. They work extremely well in situations where a high capacity alignable bearing is required. They are available in a wide range of shaft sizes and a variety of mounts.

SKF® spherical bearing units are used exclusively in the Royersford R2000 series of bearings. They are capable of handling heavy radial and axial loads, running and static misalignment and high operating temperatures.

These bearings are completely assembled, sealed & lubricated at the factory so they are ready for use right from the box. The self-aligning feature provides for rapid mounting with a minimum of adjustment. The high strength grey iron housings are designed to be compact without sacrificing ruggedness.

The R2000 are available in two and four bolt Pillow Blocks, Square Flange, Piloted Flange and Wide Slot Take-up styles. All sizes and styles are available in both non-expansion and expansion types. The expansion units have the capacity to move .100". Both can handle misalignment up to ± 1 ½ deg.

All R2000 bearings come with a specially designed double lip seal that prohibits the entry of contaminants, retains lubrication and is self-purging. Royersford R2000 Bearings come in shaft sizes from 1 ⁷⁄16" thru 5" and are available from warehouses and distributor stocks throughout the United States and Canada.

2 Bolt Pillow Block

38 Products

4 Bolt Pillow Block

32 Products

Square Flange

38 Products

Piloted Flange

38 Products

Wide Slot Take-Up

38 Products

Royersford R2000 Spherical Roller Bearings have the capacity to carry substantial radial loads, thrust loads and combined radial/thrust loads. The maximum recommended load which can be applied is limited by the various components of the system, such as bearing, housing, shaft, shaft attachment, speed and life requirements as listed in this catalog.

Select a bearing from the R2000 Selection Chart having a radial load rating at the operating speed equal to or greater than the calculated "Equivalent Radial Load" for a desired L₁₀ Life. This simple method is all that is required for a majority of general applications and provides for occasional average shock loads.

Where:

• L ₁₀ = Life hours
• C = Dynamic Capacity (from table 1)
• P = Equivalent Radial Load

If the load on a double row spherical bearing is only in the radial direction (no axial load), the Equivalent Radial Load (P) is equal to the actual radial load. In situations where the bearing load consists of radial and axial (thrust) loads, the total load must be converted into an Equivalent Radial Load by the following equation:

Where:

• F A = Axial (thrust) Load
• F R = Radial Load
• X = Radial Load Factor from table 1
• Y = Thrust Load Factor from table 1

To find the X and Y values, first calculate FA/FR and compare to the value of e in Table 1. Using the appropriate values for X and Y, substitute all known values into the Equivalent Radial Load equation. The result can then be used to determine the L₁₀ life or compared to the radial load ratings in Table 2. If P is less than F_R use P=F_R If you have only axial (thrust) load, the equivalent radial load P = YF_A where Y is taken from the column for values >e.

The magnitude and direction of both radial and thrust loads must be taken into account when selecting a housing. When pillow blocks are utilized, heavy loads should be directed thru the base. Where a load pulls the housing away from the mounting base, both the hold-down bolts and housing must be of adequate strength. Auxiliary load carrying devices (such as shear bars) are advisable for side or end loading of pillow blocks and radial loads for flanged units.

The effectiveness of the shaft attachment to carry a thrust load depends on proper tightening of the set screws, shaft tolerance and shaft deflections. It is advisable to use auxiliary thrust carrying devices (shaft shoulder, thrust collar, snap ring, etc.) to locate the bearing under heavier thrust loads or where extreme reliability is desired (see Table 3 for set screw information).

The shaft tolerances recommended below are adequate for normal radial and radial/thrust load applications. Where the applied radial load exceeds the Maximum Slip Fit Radial Load, a snug-to-light press fit of the shaft is required. Since the allowable load, especially at low RPM, is very large, the shaft should be checked to assure adequate shaft strength.

Shaft Tolerances: