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Technical parameters and mounting manual for 313812 rolling mill bearings
Feb 05, 2025
High-speed rod and bar rolling mills typically use 20 models of four-row cylindrical roller bearings. The 313812 roller bearing is one of the most widely used and consumed bearings. The four-row cylindrical roller bearing 313812 is an upgraded type of spherical roller bearing 24036. The bore diameters of these two types of bearings are the same. Even many steel mill plants use the two types of bearings interchangeably when the bearing housing allows. The 4 row cylindrical bearing 313812 has a larger width and higher rated load and ultimate speed. Therefore, using the 313812 four-row cylindrical roller bearing will bring more extreme production benefits to the steel mill.
There are many differences between 313812/C4 and 24036MB/C3, which will be listed in the table below. FV's bearing engineer will explain the advantages and disadvantages of the two types of bearings. These differences need to be carefully studied and learned by friends in the steel plant.
| Features | 4CR Bearing 313812/C4 | SRB 24036MB/W33 C3 | SRB 24036CC/W33 C3 |
| External dimensions | Φ180xΦ260x168mm | Φ180xΦ280x100mm | Φ180xΦ280x100mm |
| Basic load ratings | Cr: 1560KN Cor:2500 KN | Cr: 1030 KN Cor: 1700KN | Cr: 1134KN Cor:1730 kN |
| Interchangeable models | FC3652168/C4 | Non | Non |
| Detachable | Yes (Fw: Φ202 mm) | No | No |
| Direction of carrying capacity | Only radial load | Radial and small axial load | Radial and small axial load |
| Need Roll thrust bearing for joint use | |||
| Reference speed | 1700 r/min (grease) | 1000 r/min (grease) | 1000 r/min (grease) |
| Mounting tools | Induction heater or hot oil | Induction heater or hot oil | Induction heater or hot oil |
| Dismantling tools | Induction heater (Recommended) or Flame | Lamar or Flame (Easy to cause roller neck damage) | Lamar or Flame |
| Procurement and usage guidelines | Different suppliers need to follow the same (Fw) exchange standard. | Non detachable bearings do not need to be considered | Non detachable bearings do not need to be considered |
| Unit price | Good | Good | Good |
| Common damages | Raceway and roller burns Outer ring cracking Raceway and roller fatigue Roller breakage | Raceway and roller burns | Raceway and roller burns Outer ring cracking Roller breakage |
| Main reasons | Incorrect installation Wrong clearance Poor lubrication Elliptical bearing box hole The source of bearings is chaotic | Elliptical bearing box hole Incorrect installation Wrong clearance Poor lubrication | Elliptical bearing box hole Incorrect installation Wrong clearance Poor lubrication |
| Preventive measures and mounting essentials | C4 radial clearance: 0.170-0.220mm; | C4 radial clearance: 0.180-0.240mm; Check the ellipticity of the chock bore; | C4 radial clearance: 0.180-0.240mm; Check the ellipticity of the chock bore; |
| Waste value | Cage made of brass have greater recycling value | Cage made of brass have greater recycling value | No |
If steel mill friends wish to obtain the bearing installation operation manual from FV bearings. Please contact our sales engineer.
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