top edge

R2000 Bearings Selection

Basic Bearing Load Ratings

Shaft Size

Dynamic Capacity Static Capacity
1 7/16
1 1/2
16,600 18,300

1 11/16
1 3/4

17,300

19,800

1 15/16
2
19,000 22,500

2 3/16

22,400

26,500

2 7/16
2 1/2
33,300 41,100

2 11/16
2 3/4
2 15/16
3

35,500

46,800

3 3/16
3 7/16
3 1/2
56,900 76,400

3 15/16
4

69,900

93,300

4 7/16
4 1/2
91,700 126,000
4 15/16
5

123,000

180,000

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.

L10 Hours of Life – is the life that may be expected from at least 90% of a given group of bearings operating under identical conditions. To determine L10 hours for loads & RPM's not listed, use the following equation:

equation Where:
L10 = 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:

P = XFR + YFA

Where:
FA = Axial (thrust) Load
FR = 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 FR use P=FR If you have only axial (thrust) load, the equivalent radial load P = YFA where Y is taken from the column for values >e.

spherical roller bearing

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.

Shaft Tolerances

Shaft Size

Tolerance

UP TO 1 15/16" +.0000 -.0005"
2" TO 5" +.0000 -.0010"

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.

Table 1 – Radial/Thrust Factors

Shaft
Size

 

e

FA/FR ≤ e

FA/FR > e

Dynamic Capacity

Static Capacity

Seal Speed Limit RPM

Maximum Allowable Slip Fit Radial Load (FR) LBS

X

Y

X

Y

Lbs

Newtons

Lbs

1 7/16 - 1 1/2

0.28 1.0

2.4

0.67

3.6

16600

73400

18300

2800

2000

1 11/16 - 1 3/4

0.26 1.0

2.6

0.67

3.9

17300

77000

19800

2650

2100

1 15/16 - 2

0.24 1.0

2.8

0.67

4.2

19000

84500

22500

2400

2300

2 3/16

0.24 1.0

2.8

0.67

4.2

22400

99600

26500

2150

2700

2 7/16 - 2 1/2

0.24 1.0

2.8

0.67

4.2

33300

148000

41100

1800

4000

2 11/16 - 3

0.22 1.0

3.0

0.67

4.6

35500

158000

46800

1600

4200

3 3/16 - 3 1/2

0.23 1.0

2.9

0.67

4.4

56900

253000

76400

1300

6800

3 11/16 - 4

0.24 1.0

2.8

0.67

4.2

69900

311000

93300

1200

8400

4 7/16 - 4 1/2

0.25 1.0

2.7

0.67

4.0

91700

408000

126000

1100

11000

4 15/16 - 5

0.26 1.0

2.6

0.67

3.9

123000

547000

180000

900

14800

Table 2 – Easy Selection Table

Shaft
Size (Inches)

 

L10 Life Hours

Radial Load Ratings (Lbs.) at Various Revolutions per Minute

50

100

250

500

1000

1200

1500

1750

2000

2500

1 7/16 - 1 1/2

5000
10000
30000
50000
100000
7365
5980
4300
3690
3000

5980
4860
3495
3000
2435

4545
3690
2655
2275
1850

3690
3000
2455
1850
1500

3000
2435
1750
1500
1220

2835
2305
1655
1420
1155

2655
2155
1550
1330
1080

2535
2055
1480
1270
1030

2435
1975
1420
1220
990

2275
1850
1330
1140
825

1 11/16 - 1 3/4

5000
10000
30000
50000
100000
7675
6235
4485
3845
3125
6235
5065
3640
3125
2535
4735
3845
2765
2370
1925
3845
3125
2245
1925
1565
3125
2535
1825
1565
1270
2955
2400
1725
1480
1200
2765
2245
1615
1385
1125
2640
2145
1540
1320
1075
2535
2060
1480
1270
1030

2370
1925
1385
1190
966

1 15/16 - 2

5000
10000
30000
50000
100000
8430
6845
4925
4225
3430

6845
5560
4000
3430
2785

5200
4225
3035
2605
2115

4225
3430
2465
2115
1720

3430
2785
2005
1720
1395

3245
2635
1900
1625
1320

3035
2465
1775
1520
1235

2900
2355
1695
1450
1180

2785
2260
1625
1395
1135

----
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----

2 3/16

5000
10000
30000
50000
100000
9940
8070
5805
4980
4045

8070
6555
4715
4045
3285

6130
4980
3580
3070
2495

4980
4045
2910
2495
2025

4045
3285
2360
2025
1645

3830
3110
2235
1920
1555

3580
2910
2090
1795
1455

3420
2775
1995
1710
1390

3285
2665
1920
1645
1335

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2 7/16 - 2 1/2

5000
10000
30000
50000
100000
14775
12000
8630
7405
6015

12000
9745
7010
6015
4885

9115
7405
5325
4570
3710

7405
6015
4325
3410
3015

6015
4885
3510
3015
2445

5695
4625
3325
2850
2315

5325
4325
3110
2665
2165

5085
4130
2970
2545
2070

4885
3965
2850
2445
1985

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2 11/16 - 3

5000
10000
30000
50000
100000
15750
12795
9200
7895
6410

12795
10390
7475
6410
5205

9720
7895
5675
4870
3955

7895
6410
4610
3955
3210

6410
5205
3745
3210
2610

6070
4930
3545
3040
2470

5675
4610
3315
2845
2310

5420
4400
3165
2715
2205

----
----
----
----

----
----
----
----
----

3 3/16 - 3 1/2

5000
10000
30000
50000
100000
25250
20510
14750
12655
10275

20510
16655
11980
10275
9345

15580
12655
9100
7805
6340

12655
10275
7390
6340
5150

10275
8345
6005
5150
4180

9730
7905
5685
4875
3960

----
----
----
----

----
----
----
----
----

----
----
----
----

----
----
----
----
----

3 11/16 - 4

5000
10000
30000
50000
100000
31020
25165
18120
15545
12625

25195
20465
14705
12625
10255

19140
15545
11180
9590
7790

15545
12625
9080
7790
6325

12625
10255
7375
6325
5140

11955
9710
6980
5990
4865

----
----
----
----

----
----
----
----
----

----
----
----
----

----
----
----
----
----

4 7/16 - 4 1/2

5000
10000
30000
50000
100000
40695
33050
23770
20395
16565

66050
26845
19310
16565
13455

25110
20395
14665
12585
10220

20395
16565
11915
10220
8300

16565
13455
9675
8300
6740

15680
12740
9160
7860
6385

----
----
----
----

----
----
----
----
----

----
----
----
----

----
----
----
----
----

4 15/16 - 5

5000
10000
30000
50000
100000
54585
44335
31885
27355
22220

44335
36010
25900
22220
18045

33680
27355
19675
16880
13710

27355
22220
15980
13710
11135

22220
18045
12980
11135
9045

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----
----

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----
----
----

----
----
----
----
----

----
----
----
----

----
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----
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Table 3 - Set Screw Information

Shaft Size

Set Screw

Tightening Torque

Permissible Axial Load

Inches

No. Size

In-Lbs

Lbs

1 7/16 - 2 3/16

2 3/8"-24

250

515

2 7/16 - 3 1/2

2 1/2"-20

620

900

3 11/16 - 4

2 5/8"-18

1325

1200

4 7/16 - 5

4 5/8"-18

1325

2400