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NTN 7311B Medium Size Ball Bearing - Standard
MODEL 7311B
$766.11 Each
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Technical Specifications
Type | Angular Contact Ball Bearing |
Bore Type | Round |
Material | High Carbon Chrome Steel |
Cage Type | Pressed |
Cage Material | Steel |
Ball Material | Steel |
Limiting Speed - Oil | 7300 RPM |
Limiting Speed - Grease | 5500 RPM |
Precision | ISO Class 0 |
Configuration | One |
Static Load Rating | 12700 lbf56500 N56.50 kN |
Dynamic Load Rating | 17800 lbf79000 N79.00 kN |
Enclosure | Open |
Weight | 3.086 lb1.400 kg |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 2.1654 in55.000 mm |
D | 4.7244 in120.000 mm |
B | 1.1417 in29.000 mm |
r | 0.0787 in2.000 mm |
r1 | 0.0394 in1.000 mm |
Contact Angle | 40 |
a (Load Center) | 2.0472 in52.000 mm |
da min | 2.5591 in65.000 mm |
db min | 2.3819 in60.500 mm |
Da max | 4.3307 in110.000 mm |
Db max | 4.5079 in114.500 mm |
ras max | 0.0787 in2.000 mm |
r1as max | 0.0394 in1.000 mm |
Double Row Width | 2.2835 in58.000 mm |
Triple Row Width | 3.4252 in87.000 mm |
Quadruple Row Width | 4.5669 in116.000 mm |
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