Sealmaster USRB5000 Series Two-Bolt Base Pillow Blocks - Collar Mount Catalog Page
®
Performance Mounted Spherical Roller Bearings
Rolling Elements: Spherical Roller
Bearings
Mtd. Spherical
Housing: Cast Iron Two Bolt Pillow
Block
Self Alignment: +/- 2 Degrees
Lock: Setscrew
Seal: Felt
Optional Seal: Double Lip Contact
Temperature: -20° to 220° F
45°
C (MIN)
C (MAX)
B
G
A
BOLT SIZE
L
H
USRB5000 Series Two-Bolt Base Pillow Blocks - Collar Mount
Bore
Diameter
inch
1 1/8 USRB5000-102
1 3/16 USRB5000-103
1 1/4 USRB5000-104
1 7/16
1 1/2
1 11/16 USRB5000-111 22689 2 1/8 7 3/8 5 3/16 5 13/16 2 3/16 1 5/16 4 1/4 2 7/8 2 3/4 2 13/16
1 3/4 USRB5000-112 100921 54.0 187.3 131.8 147.6 55.6 33.3 108.0 73.0 69.9 71.4 3.55
1 15/16 USRB5000-115 23520 2 1/4 8 3/8 5 15/16 6 9/16 2 3/16 1 3/8 4 9/16 2 7/8 3 2 25/32
2 USRB5000-200 104617 57.2 212.7 150.8 166.7 55.6 34.9 115.9 73.0 76.2 70.6 5.23
2 3/16 USRB5000-203
2 7/16 USRB5000-207 44691 2 3/4 9 1/4 6 13/16 7 7/16 2 11/16 1 3/4 5 11/16 3 3/8 4 3 9/32
2 1/2 USRB5000-208 198786 69.9 235.0 173.0 188.9 68.3 44.5 144.5 85.7 101.6 83.3 7.27
2 11/16 USRB5000-211
2 3/4 USRB5000-212 47447 3 1/4 10 7/16 7 13/16 8 7/16 2 13/16 2 1/4 6 7/16 3 7/8 4 17/32 3 3/4 23.7
2 15/16 USRB5000-215 211044 82.6 265.1 198.4 214.3 71.4 57.2 163.5 98.4 115.1 95.3 10.77
3 USRB5000-300
3 3/16 USRB5000-303
3 7/16 USRB5000-307
3 1/2 USRB5000-308
3 11/16 USRB5000-311
3 15/16 USRB5000-315 1
4 USRB5000-400
Part No.
USRB5000-107
USRB5000-108
Basic
Dynamic
Rating
lb/N
20368
90597
20368
90597
28087 2 1/2 8 7/8 6 9/16 7 1/16 2 7/16 1 5/8 5 3 1/8 3 1/4 3 1/8
124931 63.5 225.4 166.7 179.4 61.9 41.3 127.0 79.4 82.6 79.4 5.23
72640
323103
96050
427230
A B
1 3/4
1 7/8
3 3/4
4 1/8
104.8
6 5/16
44.5
160.3
6 7/8
47.6
174.6
95.313330.2
14 1/4
362.010254.0
C
Min. Max.
4 1/2
114.35 127.0
4 11/16
119.1
235.0
9 1/4
5 5/16
134.9
10 3/4
273.1
11 3/4
298.5
Dimensions inch / mm
D G H J L M *
2 3/16
2 3/16
3 3/16
3 9/16
55.6
55.6
81.0
90.5
1 1/16
27.0
1 3/16
30.2
2 1/4
57.2
2 1/2
63.5
3 3/4
95.3
3 7/8
98.4
7 1/2
190.5
8 7/16
214.3
2 3/4
2 49/64
69.9
2 3/4
69.9
4 15/32
113.5
4 15/16
125.46152.4
70.2
2 49/64
70.2
5 5/16
134.9
2 3/4
69.9
2 3/4
69.9
4 1/4
108.0
4 23/32
119.9
Bolt
Size
3/8
1/2
1/2
5/8
5/8
5/8
3/4
7/8
J
D
M
Unit Wt.
lb/kg
6.9
3.14
6.6
3.00
7.8
7.7
11.5
16.0
37.1
81.62
49.9
22.68
*For expansion bearings, this dimension can increase by the corresponding value in table VIII on page I-69.
Metric dimensions for reference only.
Not all parts are available from stock. Please contact customer service for availability (800) 626-2120.
For more information on bearing capabilities outside of our standard offering, please contact Application Engineering (800) 626-2093.
H-9
Bearing Selection
Page H-3
Nomenclature Aid
Page H-6
Features & Benets
Page H-7
Technical Engineering
Page I-47
®
Mounted Roller Bearing Engineering Section
Installation Instructions continued
Mtd. Tapered
Alternate Lubrication Procedure:
Stop rotating equipment. Add one half the recommended amount shown in Table V. Start the bearing
and run for a few minutes. Stop the bearing and add the
Bearings
second half of the recommended amount. A temperature rise after lubrication, sometimes 30°F (17°C), is
normal. Bearing should operate at temperatures less
than 200°F (94°C) and should not exceed 250° (121°C)
for intermittent operation. For lubrication guidelines,
see Table VI.
Note: Table VI are general recommendations. Experi-
ence and testing may be required for specic applica-
Table V
Grease Charge for Relubrication
Bore Size Grease Charge (Mass - Ounces)
1 1/8 - 1 1/2 0.20
1 11/16 - 1 3/4 0.20
1 15/16 - 2 0.25
2 3/16 0.40
2 7/16 - 2 1/2 0.60
2 11/16 - 3 0.75
3 3/16 - 3 1/2 1.25
3 11/16 - 4 2.00
4 7/16 - 4 1/2 2.75
4 15/16 - 5 4.00
tions.
Table VI
Note: Grease charges in Table V are based on the use
of lithium complex thickened grease with a NLGI grade
2 consistency.
Expansion Bearing Applications:
Before installation, make certain proper expansion is
accounted for. Expansion units should be placed in a
location where relative movement between the bear-
Environment Temperature (°F)
Dirty -20 to 250 0 - 100% Daily to 1 Week
Clean
Relubrication Recommendations
-20 to 125
125 to 175
175 to 250 0 - 100% Daily to 1 Week
Speed
(% Catalog Max)
0 - 25% 4 to 10 Months
26 - 50% 1 to 4 Months
51 - 75% 1 Week to 1 Month
76 - 100% Daily to 1 Week
0 - 25% 2 to 6 Weeks
26 - 50% 1 Week to 1 Month
51 - 75%
76 - 100%
Frequency
Daily to 1 Week
ing insert and the housing can be tolerated. For most
applications using expansion type units, the xed unit
(non-expansion unit) is placed at the drive end of the
shaft. Use Table VIII to review the total available bearing
expansion. If the application requires additional expansion, consult Application Engineering.
NOTICE: One expansion unit is to be used in conjunc-
tion with one non-expansion unit for applications using
adapter lock units. Failure to utilize one expansion and
one non-expansion unit is likely to result in reduced
bearing performance.
Table VII
Maximum Operational Speed
Bore Size Felt Seal (RPM) Contact Seal (RPM)
1 1/8 - 1 1/2 4000 3000
1 11/16 - 1 3/4 4000 2750
1 15/16 - 2 4000 2500
2 3/16 3750 2200
2 7/16 - 2 1/2 3250 1750
2 11/16 - 3 3000 1600
3 3/16 - 3 1/2 2500 1350
3 11/16 - 4 2250 1200
4 7/16 - 4 1/2 2000 1100
4 15/16 - 5 1750 900
I-69
Table VIII
Total Available Housing Expansion (inch)
Bore Size Setscrew Adapter Lock
1 1/8 - 1 1/2 3/16 5/32
1 11/16 - 3 1/2 1/4 7/32
3 11/16 - 4 5/16 1/4
4 7/16 - 5 3/8 9/32
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