We can produce the diameter from 15mm~360mm single row tapered roller bearings, Following is the internal structure of different product descriptions we produce.

B Steeper contact angle than standard design
CLN Reduced tolerances for ring widths and total (abutment) width; corresponds to ISO tolerance class 6X
CL0 Accuracy to ABMA tolerance class 0 for inch bearings
CL3 Accuracy to ABMA tolerance class 3 for inch bearings
CL7A High-performance design for pinion bearing arrangements (superseded by CL7C)
CL7C High-performance design for pinion bearing arrangements
E Enhanced design.
HA1 Case-hardened inner and outer rings
HA3 Case-hardened inner ring
HN1 Inner and outer ring with special surface heat treatment
HN3 Inner ring with special surface heat treatment
J Pressed window-type steel cage, roller centre. A figure following the J indicates a different cage design
P6 Dimensional and running accuracy to old ISO tolerance class 6, better than Normal
Q Optimized contact geometry and surface finish
R Flanged outer ring
TN9 Injection mould window-type cage of glass fiber reinforced polyamide 6, 6, roller centre
U. U combined with a one-figure number identifies reduced total width tolerance.
VA321 Optimized internal design
VA606 Crowned raceway on bearing rings and special heat treatment
VA607 Crowned raceway on bearing rings and special heat treatment
VC027 Modified internal geometry for increased permissible misalignment
VC068 Increased running accuracy and special heat treatment
VE174 One locating slot in outer ring at large outer ring side face, increased running accuracy
VQ051 Modified internal geometry for increased permissible misalignment
VQ495 As CL7C but with reduced or displaced tolerance for the outside diameter
VQ506 Reduced inner ring width tolerance
VQ507 As CL7C but with reduced or displaced tolerance for the outside diameter
VQ523 As CL7C but with reduced inner ring width tolerance and reduced or displaced tolerance for the outside diameter
VQ601 Accuracy to ABMA tolerance class 0 for inch bearings
W Modified ring width tolerance, +0, 05/0 mm
X Boundary dimensions changed to conform to ISO