4 inch Roller Bearing Large Bore Tapered Bearing

4 inch roller bearing,assembly dimensional accuracy and rotational accuracy are different from metric bearings. Mainly used for imported machinery or industries with special needs.
The inch tapered roller bearing, whose overall dimensions are measured in inches, originated from British and American countries.
Structural form: single row, double row, four row.

4 inch roller bearing-The number consists of five parts of letters and numbers

Part 1- Prefix Letters
The prefix letter consists of 1-2 letters, used to represent the operating condition level of the designed bearing.
EL: Ultra Light
LL: Lighter
L: Light weight
LM: medium light weight
M: Medium
HM: medium heavy duty
H: Heavy Duty
HH: Heavier duty
EH: Ultra Heavy Duty
T: Special for thrust bearings

Part 2- Angle Code
The first digit after the prefix letter represents the outer circle contact angle code.

Part 3- Basic series numbering
The second, third, or fourth digit after the prefix letter represents the corresponding basic series.

Part 4- Part Numbers
The 5th or 6th digit after the prefix letter, which is the last two digits, represents the actual number of the bearing component.
The outer circle number is represented by any number from 10 to 19 (including 10 and 19).
The inner circle number is represented by any number from 30 to 49, including 30 and 49.

Part 5- Suffixes
Single tapered roller bearings, bearings with large cone angles, with a trailing code B and a cone angle between 25 ° and 29 °, can withstand large axial loads.
The outer ring (or inner ring) of a double row tapered roller bearing is a whole. The small end faces of the two inner rings (or outer rings) are similar, with a spacer ring in the middle. The clearance is adjusted by the thickness of the spacer ring, or the pre interference of the double row tapered roller bearing can be adjusted by the thickness of the spacer ring.
Four row tapered roller bearings
TQO (straight hole four row combination) bearing,
TQOW (with inner ring end face lubrication groove TQO) bearing
TQITS (four row tapered inner hole combination) bearing
TQITSE (TQIT, with outer inner ring) bearing.

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