Four row tapered roller bearings

Description

IMCB can provide four row tapered roller bearings in TQO and TQI model series, with specific types as follows:
TQO designed bearings (face-to-face configuration):
Open or sealed
With cylindrical or conical holes
Extended with or without inner ring on both sides
Bearing with or without spiral groove inside
Basic design or IMCB Explorer bearings
TQI designed bearings (back-to-back configuration):
With cylindrical or conical holes
Extension with or without inner ring on one side
TQO type bearings
TQO type bearings have two pairs of tapered rollers and cage components. Double row rollers are configured face-to-face for each pair. Because TQO is the most widely used four row tapered roller bearing design, IMCB can offer multiple types of this model, such as:
Design form characteristics
TQON

Two double row inner rings
Four single row outer rings
No spacer ring
Window steel retaining frame
TQO

Two double row inner rings
One double row and two single row outer rings
There are spacers between the outer rings and spacers between the inner rings
Window steel retaining frame
TQON.1

Two double row inner rings
Four single row outer rings
No spacer ring
Pin type steel cage (perforated roller)
TQO.1

Two double row inner rings
One double row and two single row outer rings
There are spacers between the outer rings and spacers between the inner rings
Pin type steel cage (perforated roller)
TQOEN

Two double row inner rings, with one side lengthened
The extended inner rings on both sides of the bearing are designed as opposite surfaces for radial shaft sealing
Four single row outer rings
No spacer ring
Window steel retaining frame
TQOE

Two double row inner rings, with one side lengthened
The extended inner rings on both sides of the bearing are designed as opposite surfaces for radial shaft sealing
One double row and two single row outer rings
There are spacers between the outer rings and spacers between the inner rings
Window steel retaining frame
TQOT

Two double row inner rings
One double row and two single row outer rings
There is a spacer between the outer rings
Window steel retaining frame
Conical hole, taper 1:12
If the roll neck requires an interference fit
TQOSN

Two double row inner rings
Four single row outer rings
No spacer ring
Window steel retaining frame
Sealed on both sides
TQOSNP

Two double row inner rings
Four single row outer rings
There is a spacer between the two inner rings and the two middle outer rings
Window steel retaining frame
Sealed on both sides
TQOS

Two double row inner rings
One double row and two single row outer rings
There are spacers between the outer rings and spacers between the inner rings
Window steel retaining frame
Sealed on both sides
TQOSN.1

Two double row inner rings
Four single row outer rings
No spacer ring
Pin type steel cage (perforated roller)
Sealed on both sides
TQOESN

Two double row inner rings, with one side lengthened
The extended inner rings on both sides of the bearing are designed as opposite surfaces for radial shaft sealing
Four single row outer rings
No spacer ring
Window steel retaining frame
Sealed on both sides
TQOES

Two double row inner rings, with one side lengthened
The extended inner rings on both sides of the bearing are designed as opposite surfaces for radial shaft sealing
One double row and two single row outer rings
There are spacers between the outer rings and spacers between the inner rings
Window steel retaining frame
Sealed on both sides
TQI type bearings
TQI type bearings have two pairs of tapered rollers and cage components. Each pair of double row rollers is configured back-to-back. This type of bearing provides a relatively rigid bearing configuration and can withstand overturning moments. In this application, bearings are generally installed on the roll neck with interference fit, so they often have tapered holes.
TQI type bearings are also used for the vertical rollers of universal rolling mills. In this case, a bearing with a cylindrical hole is required because the inner ring has a clearance fit on its journal and the outer ring is installed in the bearing seat in an interference fit manner.
Example of TQI design form:
Design form characteristics
TQIN

One double row and two single row inner rings
Two double row outer rings
No spacer ring
Window steel retaining frame
TQINT

One double row and two single row inner rings
Two double row outer rings
No spacer ring
Window steel retaining frame
Conical hole, taper 1:12 or 1:30
TQI

One double row and two single row inner rings
Two double row outer rings
There is a spacer between the outer rings
Two spacers between the inner rings
Window steel retaining frame
TQI.1

One double row and two single row inner rings
Two double row outer rings
There is a spacer between the outer rings
Two spacers between the inner rings
Pin type steel cage (perforated roller)
TQI.2

One double row and two single row inner rings
Two double row outer rings
Two spacers between the inner rings
Window steel retaining frame
TQIT

One double row and two single row inner rings
Four single row outer rings
Three spacers between the outer rings
Window steel retaining frame
Conical hole, taper 1:12 or 1:30
If the roll neck requires an interference fit
TQIT.1

One double row and two single row inner rings
Four single row outer rings
Three spacers between the outer rings
Pin type steel cage (perforated roller)
Conical hole, taper 1:12 or 1:30
If the roll neck requires an interference fit
TQITE

One double row and two single row inner rings
The inner ring is lengthened on one side
Four single row outer rings
Three spacers between the outer rings
Window steel retaining frame
Conical hole, taper 1:12 or 1:30
If the roll neck requires an interference fit
TQITE.1

One double row and two single row inner rings
The inner ring is lengthened on one side
Four single row outer rings
Three spacers between the outer rings
Pin type steel cage (perforated roller)
Conical hole, taper 1:12 or 1:30
If the roll neck requires an interference fit
sealed bearing
Compared with open type bearings, it has the following general advantages:
Extend the service life of bearings
Improve reliability
Reduce maintenance
Reduced consumption of lubricating grease (up to 90%)
reduced environmental impacts
Reduce the pollution of excess lubricating grease on the grinding emulsion to improve the steel rolling process and product quality
It is the preferred solution for rolling mills
It is a simple alternative to open type bearings, as they have the same external dimensions and even the same load-bearing capacity depending on the sealing design (IMCB Explorer bearings)
There are grooves with O-rings on the outer surface of the bearing to prevent any contaminants from entering the position between the outer ring and the bearing seat
One of the following seals is installed on both sides:
Standard fluororubber sealing design
Standard hydrogenated nitrile rubber seal design for IMCB Explorer bearings
Upgraded hydrogenated nitrile rubber seal design for IMCB Explorer bearings
Table 1 provides an overview of sealing design.
Identify with model suffix S