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  • Double Row Cylindrical Roller Bearings
  • Double Row Cylindrical Roller Bearings
Double Row Cylindrical Roller Bearings

Double Row Cylindrical Roller Bearings

BCHH Double Row Cylindrical Roller Bearings integrate our 20+ years of precision manufacturing expertise 

with ISO 9001 certified quality systems to deliver superior load-bearing performance. These advanced 

bearings feature two rows of precision-ground rollers arranged in a compact design, providing significantly

 enhanced radial load capacity compared to single row versions. The optimized internal geometry and 

high-grade steel construction ensure excellent rotational accuracy, operational stability, and extended 

service life in heavy-duty applications.


Applications:

Heavy industrial gearboxes and large reducers

Machine tool main spindles and rotating components

Wind turbine generator systems

Mining and construction machinery

Steel mill equipment and rolling mills

Large electric motors and generators


Maximize your equipment's load capacity with BCHH Double Row Cylindrical Roller Bearings. Contact our

 engineering team today for technical specifications and competitive pricing. Request samples to test 

performance in your application.


Get Product Catalog Send inquiry WhatsApp
InquiryBearing NO. Boundary dimensions(mm) Basic load ratings(kN) Limiting speed(rpm) Abutment and fillet dimensions(mm) Weight (kg)
Cylindrical boreTapered boredDB/Cr 1.2minr3.4minCrCorSpeed Ratingsda maxDa maxra maxrb maxRefer
NN3920 NN3920K 100 140 30 1.1 1.1 106 182 6300 109 131 1 1 1.32
NNU4920 NNU4920K 100 140 40 1.1 1.1 128 255 6300 111 133.5 1 1 1.9
NN4920 NN4920K 100 140 40 1.1 1.1 128 255 6300 109 131 1 1 1.76
NNUB4920-70 - 100 140 70/40 1.1 1.1 128 255 4800 111 133.5 1 1 2.5
NNUB4920-80 - 100 140 80/40 1.1 1.1 128 255 4800 111 133.5 1 1 2.65
NN3020 NN3020K 100 150 37 1.5 1.5 151 250 6000 111 142 1.5 1.5 2.2
NN3120 - 100 165 52 1.1 1.1 234 360 3600 109 155 1 1 4.38
NNU3120 - 100 165 52 2 2 234 360 3600 112 152 2 2 4.39
NNU4120 NNU4120K30 100 165 65 2 2 358 570 3600 114 155 2 2 5.5
NNU4921 NNU4921K 105 145 40 1.1 1.1 130 260 6000 116 138.5 1 1 2
NN4921 - 105 145 40 1.1 1.1 130 260 6000 114 136 1 1 2
NNU3021 NNU3021K 105 160 41 2 2 190 305 5600 - 150 2 2 2.8
NN3021 NN3021K 105 160 41 2 2 190 305 5600 117 147 2 2 2.88
NNU4121 NNU4121K30 105 175 69 2 2 413 670 3400 120 165 2 2 6.7
NN3922 NN3922K 110 150 30 1.1 1.1 114 207 6000 119 141 1 1 1.41
NNU4922 NNU4922K 110 150 40 1.1 1.1 132 270 6000 121 143.5 1 1 2.05
NN4922 NN4922K 110 150 40 1.1 1.1 132 270 6000 119 141 1 1 2.1
NNUB4922 - 110 150 55/40 1.1 1.1 132 270 4500 121 143.5 1 1 2.4
NN3022 NN3022K 110 170 45 2 2 220 360 5300 - 160 2 2 3.55
NNU3022 - 110 170 45 2 2 220 360 5300 122 157 2 2 3.74
NN3122 - 110 180 56 1.1 1.1 290 450 3200 119 170 1 1 5.4
NNU4122 NNU4122K30 110 180 69 2 2 418 710 3200 125 170 2 2 6.95
NN3924 NN3924K 120 165 34 1.1 1.1 138 251 5300 130 155 1 1 2.02
NNU4924 NNU4924K 120 165 45 1.1 1.1 176 340 5300 133 158.5 1 1 2.8
NN4924 NN4924K 120 165 45 1.1 1.1 176 340 5300 130 155 1 1 2.87
NN3024 NN3024K 120 180 46 2 2 229 390 5000 - 170 2 2 3.85
NNU3024 - 120 180 46 2 2 229 390 5000 132 167 2 2 4.07
NN3124 NN3124K 120 200 62 2 2 355 550 3000 132 167 2 2 7.72
NNU4124 NNU4124K30 120 200 80 2 2 523 865 3000 137 190 2 2 11
NNUB4224X2-130 - 120 215 130/100 2×60° 1.1 704 1120 2200 137 209.5 1 1 15.5
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