UCP 208 Bearing Specifications
Pillow Block Ball Bearings No. | Shaft Dia | Dimensions(mm) | |||||
d | |||||||
mm | h | a | e | b | S1 | S2 | |
UCP 208 | 40 | 49.2 | 184 | 137 | 54 | 17 | 21 |
Pillow Block Ball Bearings No. | Shaft Dia | Dimensions(mm) | |||||
d | |||||||
mm | g | w | n | Bi | Weight | ||
UCP 208 | 45 | 18 | 98 | 19.0 | 49.2 | 1.90 |
UCP 208 Stainless Steel Pillow Block Ball Bearings Periodic Inspection
NSAR ball bearing units do not need to be inspected as frequently as lower quality bearings.However it is good practice to set up an inspection schedule for even these high quality bearings.Since a ball bearing unit cannot be disassembled for inspection if the internal status of components.
The external appearance of the bearing must be inspected to give tel-tall signs of the status and expected life of the bearing.The following characteristics must be checked per the inspection schedule that is established for a particular application.
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UCP 208 Stainless Steel Pillow Block Ball Bearings Overall appearance
1.Looseness of set screw of bearing inner ring or of the mounting bolts.
2.Noise from vibration.
3.Temperature of the bearing housing or the inner ring.
4.Grease supply interval and quantity of grease injected into the bearing either too much or too little grease can be detrimental to the life of the bearing.
UCP 208 Bearings Components and Materials
Components | Materials used | JIS symbols | JIS number |
Sleeve for adapter | Carbon steel for machine structural use | S25C | JISG4051 |
Nut for adapter | Carbon steel for machine structural use | S25C | JISG4051 |
Washer for adapter | Cold steel for machine structural use | SPCC | JISG3141 |
Oil seal | Synthetic nitrile rubber | —— | —— |
Slinger | Cold rolled carbon steel sheet and strip | SPCC | JISG3141 |
Hexagon set screw | Nickel chromium molybdenum steel | SCM435 | JISG4105 |
Hexagon wrench key | Nickel chromium molybdenum steel | SNCM630 | JISG4103 |
Grease nipple | Free cutting brass bar | C3604 | JISG3250 |
UCP 208 Bearings Faults and Excessive Torque | |||
Faults | Excessive torque | Abnormal noise abnormal vibration | Abnormal temperatures |
Causes |
(1) Degrade grease
(2) Interference of seal with slinger due to excessive supply of grease (3) Deformation of slinger casing interference with sea (4) High load due to shaft expansion. |
(1)lmproper tightening of set screws or of mounting bolts
(2)Wear on inner ring of bearing or shaft due to creep or fretting (3)lngress of foreign matter dirt into bearing (4)Damage to cage or ball rolling surfaces due to rolling fatigue (5)Dent on raceway surface or ball rolling surface because of excessive load (6)Warped or bent shaft. |
(1)Degraded grease
(2)Interference of seal with slinger due to excessive supply of grease (3)Deformation of slinger casing interfer-ence with seal (4)Looseness of setscrew eccentric locking ring or adapter lock nut for bearings (5)Load due to shaft expansion (6)Damage to cage or ball rolling surfaces due to rolling fatigue. |