Extra Large Bearings 777 / 660 M Four Row Tapered Roller Bearings Used For Rolling Mill Huge Machinery
1 . Extra Large Size Four Row Spherical Roller Bearing :
Four-row tapered roller bearings can accommodate combined (radial and axial) loads at low to moderate speeds. They are used almost exclusively in work roll applications such as rolling mills.
| Old Code | ID ( mm ) | OD ( mm ) | Height ( mm ) | Mass Weight kgs |
| 777 / 620 | 620 | 800 | 363 | 480 |
| 777 / 650 | 650 | 1030 | 558 | 1830 |
| 777 / 660 | 660 | 1070 | 648 | 2280 |
| 777 / 750 | 750 | 1130 | 688 | 2480 |
2 . Features for Four Row Spherical Roller Bearing :
Depending on their design, four-row tapered roller bearings provide the following main features and benefits:
- Long service life
The four-cup design (four separate outer rings) provides optimal load distribution over all four rows of rollers. - Enhanced operational reliability
Optimized surface finish on the contact surfaces of the rollers and raceways supports the formation of a hydrodynamic lubricant film. - Improved wear resistance
In particular, SKF Explorer bearings are made of extremely clean and homogenous steel and undergo a unique heat treatment, which improve the resistance to wear. - Improved sealing performance with less leakage and less frictional heat
The optimized seal design ensures high protection against external contamination but keeps friction and frictional heat low. This seal design also provides a better retention of lubricant, minimizes environmental impact and reduces maintenance costs. - Equal load carrying capacity for sealed and open bearings
The optimized and compact seal design enables identical internal design. - Total bearing interchangeability
Bearings with and without intermediate rings as well as open and sealed bearings are available with identical external dimensions. This allows total bearing interchangeability of current standard design bearings with those without intermediate rings and/or with optimized seal design. - Separable mounting and simpler inspection
Optimized designs without intermediate rings enable to dismount and separate the cage and roller assemblies and seals. This facilitates mounting, dismounting and also maintenance inspection routines. - Axial space-saving and cost-effective solution for roll necks
The roll necks can be relatively short, no separate axial bearings are required and identically designed chocks (fig. 1) can be used on both sides of the roll. - Simple axial location on roll necks
Tighter inner ring width tolerances facilitate the tolerancing and dimensioning of surrounding components.
3. Packaging
4 . Delivery
1 ) Less than 45 KGS, we will send by express. ( Door to Door, Convenient )
2 ) Between 45 - 200 KGS, we will send by air transport. ( Fastest and safest, but expensive )
3 ) More than 200 KGS, we will send by sea. ( Cheapest, but long time )
5 . Main Application
The papemaking machinery, speed reducer, railway vehicle axle, rolling mill gear box bearing, rolling mill roller, crusher, vibrating screen, printing machinery, woodworking machinery, all kinds of industrial deceleration machine, vertical set-contained spherical roller bearing.
6 . BEARING APPLICATION FIELDS :
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Extra Large Bearings 777 / 660 M Four Row Tapered Roller Bearings Used For Rolling Mill Huge Machinery Images
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