We can produce the diameter from 3mm~1 500mm LHB single row deep groove ball bearings. 10mm~100mm LHB double row deep groove ball bearings\and LHB sealed single row deep groove ball bearings\single row deep groove ball bearings with filling slots etc. Following is the internal structure of LHB different product descriptions.
C2      Radial internal clearance smaller than Normal
C3  Radial internal clearance greater than Normal
C4  Radial internal clearance greater than C3
C5  Radial internal clearance greater than C4
DB  Two single row deep groove ball bearings matched for paired mounting  in a back-to-back arrangement
DF  Two single row deep groove ball bearings matched for paired mounting  in a face-to-face arrangement
DT  Two single row deep groove ball bearings matched for paired mounting in a  tandem arrangement
E  Reinforced ball set
J  Pressed steel cage
M  Machined brass cage, ball centred.
MA  Machined brass cage, outer ring centred
MAS  As MA but with lubrication grooves in the guiding surfaces
MB  Machined brass cage, inner ring centred
MBS  As MB but with lubrication grooves in the guiding surfaces
N  Snap ring groove in outer ring
NR  Snap ring groove in the outer ring, with appropriate snap ring
N1  One locating slot (notch) in one outer ring sideface
RS1  Sheet steel reinforced contact seal of acrylonitrile-butadiene  rubber (NBR) on one side of the bearing
RSH  Sheet steel reinforced contact seal of acrylonitrile-butadiene  rubber (NBR) on one side of the bearing
RSL  Sheet steel reinforced low friction contact seal of  acrylonitrile-butadiene rubber (NBR) on one side of the bearing
RZ  Sheet steel reinforced low friction seal of acrylonitrile- butadiene rubber (NBR) on one side of the bearing
TH  Snap-type cage of fabric reinforced phenolic resin, ball centred
TN  Injection moulded snap-type cage of polyamide, ball centred
TNH  Injection moulded snap-type cage of glass fibre reinforced polyetheretherketone (PEEK), ball centred
TN9  Injection moulded snap-type cage of glass fibre reinforced  polyamide 6,6, ball centred
VL0241  Aluminium oxide coated outside surface of the outer ring for  electrical resistance up to 1 000 V DC
VL2071  Aluminium oxide coated outside surface of the inner ring for  electrical resistance up to 1 000 V DC
WT  Grease with polyurea  thickener of consistency 2-3 to the NLGI Scale for temperature range –40 to +160 °C (normal filling grade)
Y       Pressed brass cage, ball centred
Z  Shield of pressed sheet steel on one side of the bearing
ZNR  Shield of pressed sheet steel on one side of the bearing and snap ring groove in the outer ring with snap ring on the opposite side of the shield
2RS1  RS1 contact seal on both sides of the bearing
2RSH  RSH contact seal on both sides of the bearing
2RSL  RSL low friction contact seal on both sides of the bearing
2RZ  RZ low friction seal on both sides of the bearing
2Z  Z shield on both sides of the bearing
2ZNR  Z shield on both sides of the bearing and snap ring groove in the outer ring with snap ring