• NTN 231 Series Spherical Roller Bearings (Cylindrical & Tapered Bore)
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NTN 231 Series Spherical Roller Bearings (Cylindrical & Tapered Bore)

NTN 231 Series Spherical Roller Bearings (Cylindrical & Tapered Bore)

NTN 231 series double-row spherical roller bearings, bore 100-900 mm, with cylindrical bore or tapered bore (K = 1:12, K30 = 1:30).

Key features

  • Self-aligning design tolerates shaft deflection and misalignment
  • Very high radial load capacity with axial load in both directions
  • Tapered bore versions for adapter or withdrawal sleeve mounting
  • Mass shown for cylindrical bore type

Specifications

Series 231
Bearing type Double-row spherical roller bearing
Bore range 100-900 mm
Bore options Cylindrical, tapered K (1:12), K30 (1:30)
Load rating unit kN
Source NTN NTN Ball and Roller Bearings catalogue, p. 130-136
23120B d: 100 mm | D: 165 mm | B: 52 mm | Cr: 310 kN | C0r: 470 kN | Mass: 4.3 kg
23120BK d: 100 mm | D: 165 mm | B: 52 mm | Cr: 310 kN | C0r: 470 kN | Mass: 4.3 kg
23122B d: 110 mm | D: 180 mm | B: 56 mm | Cr: 370 kN | C0r: 580 kN | Mass: 5.4 kg
23122BK d: 110 mm | D: 180 mm | B: 56 mm | Cr: 370 kN | C0r: 580 kN | Mass: 5.4 kg
23124B d: 120 mm | D: 200 mm | B: 62 mm | Cr: 455 kN | C0r: 705 kN | Mass: 7.7 kg
23124BK d: 120 mm | D: 200 mm | B: 62 mm | Cr: 455 kN | C0r: 705 kN | Mass: 7.7 kg
23126B d: 130 mm | D: 210 mm | B: 64 mm | Cr: 495 kN | C0r: 795 kN | Mass: 8.47 kg
23126K d: 130 mm | D: 210 mm | B: 64 mm | Cr: 495 kN | C0r: 795 kN | Mass: 8.47 kg
23128B d: 140 mm | D: 225 mm | B: 68 mm | Cr: 540 kN | C0r: 895 kN | Mass: 10.2 kg
23128BK d: 140 mm | D: 225 mm | B: 68 mm | Cr: 540 kN | C0r: 895 kN | Mass: 10.2 kg
23130B d: 150 mm | D: 250 mm | B: 80 mm | Cr: 730 kN | C0r: 1190 kN | Mass: 15.6 kg
23130BK d: 150 mm | D: 250 mm | B: 80 mm | Cr: 730 kN | C0r: 1190 kN | Mass: 15.6 kg
23132B d: 160 mm | D: 270 mm | B: 86 mm | Cr: 840 kN | C0r: 1370 kN | Mass: 19.8 kg
23132K d: 160 mm | D: 270 mm | B: 86 mm | Cr: 840 kN | C0r: 1370 kN | Mass: 19.8 kg
23134B d: 170 mm | D: 280 mm | B: 88 mm | Cr: 885 kN | C0r: 1490 kN | Mass: 21.5 kg
23134BK d: 170 mm | D: 280 mm | B: 88 mm | Cr: 885 kN | C0r: 1490 kN | Mass: 21.5 kg
23136B d: 180 mm | D: 300 mm | B: 96 mm | Cr: 1030 kN | C0r: 1730 kN | Mass: 25.1 kg
23136BK d: 180 mm | D: 300 mm | B: 96 mm | Cr: 1030 kN | C0r: 1730 kN | Mass: 25.1 kg
23138B d: 190 mm | D: 320 mm | B: 104 mm | Cr: 1190 kN | C0r: 2020 kN | Mass: 35.3 kg
23138BK d: 190 mm | D: 320 mm | B: 104 mm | Cr: 1190 kN | C0r: 2020 kN | Mass: 35.3 kg
23140B d: 200 mm | D: 340 mm | B: 112 mm | Cr: 1350 kN | C0r: 2270 kN | Mass: 43.3 kg
23140BK d: 200 mm | D: 340 mm | B: 112 mm | Cr: 1350 kN | C0r: 2270 kN | Mass: 43.3 kg
23144B d: 220 mm | D: 370 mm | B: 120 mm | Cr: 1540 kN | C0r: 2670 kN | Mass: 53.3 kg
23144BK d: 220 mm | D: 370 mm | B: 120 mm | Cr: 1540 kN | C0r: 2670 kN | Mass: 53.3 kg
23148B d: 240 mm | D: 400 mm | B: 128 mm | Cr: 1730 kN | C0r: 3050 kN | Mass: 65.8 kg
23148BK d: 240 mm | D: 400 mm | B: 128 mm | Cr: 1730 kN | C0r: 3050 kN | Mass: 65.8 kg
23152B d: 260 mm | D: 440 mm | B: 144 mm | Cr: 2140 kN | C0r: 3850 kN | Mass: 91.4 kg
23152BK d: 260 mm | D: 440 mm | B: 144 mm | Cr: 2140 kN | C0r: 3850 kN | Mass: 91.4 kg
23156B d: 280 mm | D: 460 mm | B: 146 mm | Cr: 2300 kN | C0r: 4250 kN | Mass: 97.7 kg
23156BK d: 280 mm | D: 460 mm | B: 146 mm | Cr: 2300 kN | C0r: 4250 kN | Mass: 97.7 kg
23184B d: 420 mm | D: 700 mm | B: 224 mm | Cr: 5200 kN | C0r: 9950 kN | Mass: 354 kg
23184BK d: 420 mm | D: 700 mm | B: 224 mm | Cr: 5200 kN | C0r: 9950 kN | Mass: 354 kg
23188B d: 440 mm | D: 720 mm | B: 226 mm | Cr: 5200 kN | C0r: 10100 kN | Mass: 370 kg
23188BK d: 440 mm | D: 720 mm | B: 226 mm | Cr: 5200 kN | C0r: 10100 kN | Mass: 370 kg
23192B d: 460 mm | D: 760 mm | B: 240 mm | Cr: 5700 kN | C0r: 11400 kN | Mass: 443 kg
23192BK d: 460 mm | D: 760 mm | B: 240 mm | Cr: 5700 kN | C0r: 11400 kN | Mass: 443 kg
23196B d: 480 mm | D: 790 mm | B: 248 mm | Cr: 6200 kN | C0r: 12300 kN | Mass: 492 kg
23196BK d: 480 mm | D: 790 mm | B: 248 mm | Cr: 6200 kN | C0r: 12300 kN | Mass: 492 kg
231/500B d: 500 mm | D: 830 mm | B: 264 mm | Cr: 6950 kN | C0r: 13700 kN | Mass: 584 kg
231/500BK d: 500 mm | D: 830 mm | B: 264 mm | Cr: 6950 kN | C0r: 13700 kN | Mass: 584 kg
231/530B d: 530 mm | D: 870 mm | B: 272 mm | Cr: 7000 kN | C0r: 14200 kN | Mass: 653 kg
231/530BK d: 530 mm | D: 870 mm | B: 272 mm | Cr: 7000 kN | C0r: 14200 kN | Mass: 653 kg
231/560B d: 560 mm | D: 920 mm | B: 280 mm | Cr: 7650 kN | C0r: 15500 kN | Mass: 752 kg
231/560BK d: 560 mm | D: 920 mm | B: 280 mm | Cr: 7650 kN | C0r: 15500 kN | Mass: 752 kg
231/600B d: 600 mm | D: 980 mm | B: 300 mm | Cr: 9000 kN | C0r: 18400 kN | Mass: 908 kg
231/600BK d: 600 mm | D: 980 mm | B: 300 mm | Cr: 9000 kN | C0r: 18400 kN | Mass: 908 kg
231/630B d: 630 mm | D: 1030 mm | B: 315 mm | Cr: 9600 kN | C0r: 19900 kN | Mass: 1050 kg
231/630BK d: 630 mm | D: 1030 mm | B: 315 mm | Cr: 9600 kN | C0r: 19900 kN | Mass: 1050 kg
231/670B d: 670 mm | D: 1090 mm | B: 336 mm | Cr: 11000 kN | C0r: 22800 kN | Mass: 1250 kg
231/670BK d: 670 mm | D: 1090 mm | B: 336 mm | Cr: 11000 kN | C0r: 22800 kN | Mass: 1250 kg
231/710B d: 710 mm | D: 1150 mm | B: 345 mm | Cr: 11600 kN | C0r: 24900 kN | Mass: 1420 kg
231/710BK d: 710 mm | D: 1150 mm | B: 345 mm | Cr: 11600 kN | C0r: 24900 kN | Mass: 1420 kg
231/750B d: 750 mm | D: 1220 mm | B: 365 mm | Cr: 12800 kN | C0r: 27200 kN | Mass: 1700 kg
231/750BK d: 750 mm | D: 1220 mm | B: 365 mm | Cr: 12800 kN | C0r: 27200 kN | Mass: 1700 kg
231/800B d: 800 mm | D: 1280 mm | B: 375 mm | Cr: 14400 kN | C0r: 31000 kN | Mass: 1890 kg
231/800BK d: 800 mm | D: 1280 mm | B: 375 mm | Cr: 14400 kN | C0r: 31000 kN | Mass: 1890 kg
231/850B d: 850 mm | D: 1360 mm | B: 400 mm | Cr: 15500 kN | C0r: 34000 kN | Mass: 2270 kg
231/850BK d: 850 mm | D: 1360 mm | B: 400 mm | Cr: 15500 kN | C0r: 34000 kN | Mass: 2270 kg
231/900B d: 900 mm | D: 1420 mm | B: 412 mm | Cr: 16800 kN | C0r: 38000 kN | Mass: 2500 kg
231/900BK d: 900 mm | D: 1420 mm | B: 412 mm | Cr: 16800 kN | C0r: 38000 kN | Mass: 2500 kg
Spherical Roller BearingsNTN
60 product codes available in this family
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NTN 231 Series Spherical Roller Bearings (Cylindrical & Tapered Bore)

Brand NTN·Spherical Roller Bearings

Available part numbers (60)

23120B, 23120BK, 23122B, 23122BK, 23124B, 23124BK, 23126B, 23126K, 23128B, 23128BK + 50 more — see full table ↓

How to order

Send the NTN part numbers and quantities through our RFQ form or to info@prosourcemro.com. We confirm price, availability and lead time within 1 business day — no account needed.

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Product codes & specifications
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Product codeSpec
23120Bd: 100 mm | D: 165 mm | B: 52 mm | Cr: 310 kN | C0r: 470 kN | Mass: 4.3 kg
23120BKd: 100 mm | D: 165 mm | B: 52 mm | Cr: 310 kN | C0r: 470 kN | Mass: 4.3 kg
23122Bd: 110 mm | D: 180 mm | B: 56 mm | Cr: 370 kN | C0r: 580 kN | Mass: 5.4 kg
23122BKd: 110 mm | D: 180 mm | B: 56 mm | Cr: 370 kN | C0r: 580 kN | Mass: 5.4 kg
23124Bd: 120 mm | D: 200 mm | B: 62 mm | Cr: 455 kN | C0r: 705 kN | Mass: 7.7 kg
23124BKd: 120 mm | D: 200 mm | B: 62 mm | Cr: 455 kN | C0r: 705 kN | Mass: 7.7 kg
23126Bd: 130 mm | D: 210 mm | B: 64 mm | Cr: 495 kN | C0r: 795 kN | Mass: 8.47 kg
23126Kd: 130 mm | D: 210 mm | B: 64 mm | Cr: 495 kN | C0r: 795 kN | Mass: 8.47 kg
23128Bd: 140 mm | D: 225 mm | B: 68 mm | Cr: 540 kN | C0r: 895 kN | Mass: 10.2 kg
23128BKd: 140 mm | D: 225 mm | B: 68 mm | Cr: 540 kN | C0r: 895 kN | Mass: 10.2 kg
23130Bd: 150 mm | D: 250 mm | B: 80 mm | Cr: 730 kN | C0r: 1190 kN | Mass: 15.6 kg
23130BKd: 150 mm | D: 250 mm | B: 80 mm | Cr: 730 kN | C0r: 1190 kN | Mass: 15.6 kg
23132Bd: 160 mm | D: 270 mm | B: 86 mm | Cr: 840 kN | C0r: 1370 kN | Mass: 19.8 kg
23132Kd: 160 mm | D: 270 mm | B: 86 mm | Cr: 840 kN | C0r: 1370 kN | Mass: 19.8 kg
23134Bd: 170 mm | D: 280 mm | B: 88 mm | Cr: 885 kN | C0r: 1490 kN | Mass: 21.5 kg
23134BKd: 170 mm | D: 280 mm | B: 88 mm | Cr: 885 kN | C0r: 1490 kN | Mass: 21.5 kg
23136Bd: 180 mm | D: 300 mm | B: 96 mm | Cr: 1030 kN | C0r: 1730 kN | Mass: 25.1 kg
23136BKd: 180 mm | D: 300 mm | B: 96 mm | Cr: 1030 kN | C0r: 1730 kN | Mass: 25.1 kg
23138Bd: 190 mm | D: 320 mm | B: 104 mm | Cr: 1190 kN | C0r: 2020 kN | Mass: 35.3 kg
23138BKd: 190 mm | D: 320 mm | B: 104 mm | Cr: 1190 kN | C0r: 2020 kN | Mass: 35.3 kg
23140Bd: 200 mm | D: 340 mm | B: 112 mm | Cr: 1350 kN | C0r: 2270 kN | Mass: 43.3 kg
23140BKd: 200 mm | D: 340 mm | B: 112 mm | Cr: 1350 kN | C0r: 2270 kN | Mass: 43.3 kg
23144Bd: 220 mm | D: 370 mm | B: 120 mm | Cr: 1540 kN | C0r: 2670 kN | Mass: 53.3 kg
23144BKd: 220 mm | D: 370 mm | B: 120 mm | Cr: 1540 kN | C0r: 2670 kN | Mass: 53.3 kg
23148Bd: 240 mm | D: 400 mm | B: 128 mm | Cr: 1730 kN | C0r: 3050 kN | Mass: 65.8 kg
23148BKd: 240 mm | D: 400 mm | B: 128 mm | Cr: 1730 kN | C0r: 3050 kN | Mass: 65.8 kg
23152Bd: 260 mm | D: 440 mm | B: 144 mm | Cr: 2140 kN | C0r: 3850 kN | Mass: 91.4 kg
23152BKd: 260 mm | D: 440 mm | B: 144 mm | Cr: 2140 kN | C0r: 3850 kN | Mass: 91.4 kg
23156Bd: 280 mm | D: 460 mm | B: 146 mm | Cr: 2300 kN | C0r: 4250 kN | Mass: 97.7 kg
23156BKd: 280 mm | D: 460 mm | B: 146 mm | Cr: 2300 kN | C0r: 4250 kN | Mass: 97.7 kg
23184Bd: 420 mm | D: 700 mm | B: 224 mm | Cr: 5200 kN | C0r: 9950 kN | Mass: 354 kg
23184BKd: 420 mm | D: 700 mm | B: 224 mm | Cr: 5200 kN | C0r: 9950 kN | Mass: 354 kg
23188Bd: 440 mm | D: 720 mm | B: 226 mm | Cr: 5200 kN | C0r: 10100 kN | Mass: 370 kg
23188BKd: 440 mm | D: 720 mm | B: 226 mm | Cr: 5200 kN | C0r: 10100 kN | Mass: 370 kg
23192Bd: 460 mm | D: 760 mm | B: 240 mm | Cr: 5700 kN | C0r: 11400 kN | Mass: 443 kg
23192BKd: 460 mm | D: 760 mm | B: 240 mm | Cr: 5700 kN | C0r: 11400 kN | Mass: 443 kg
23196Bd: 480 mm | D: 790 mm | B: 248 mm | Cr: 6200 kN | C0r: 12300 kN | Mass: 492 kg
23196BKd: 480 mm | D: 790 mm | B: 248 mm | Cr: 6200 kN | C0r: 12300 kN | Mass: 492 kg
231/500Bd: 500 mm | D: 830 mm | B: 264 mm | Cr: 6950 kN | C0r: 13700 kN | Mass: 584 kg
231/500BKd: 500 mm | D: 830 mm | B: 264 mm | Cr: 6950 kN | C0r: 13700 kN | Mass: 584 kg
231/530Bd: 530 mm | D: 870 mm | B: 272 mm | Cr: 7000 kN | C0r: 14200 kN | Mass: 653 kg
231/530BKd: 530 mm | D: 870 mm | B: 272 mm | Cr: 7000 kN | C0r: 14200 kN | Mass: 653 kg
231/560Bd: 560 mm | D: 920 mm | B: 280 mm | Cr: 7650 kN | C0r: 15500 kN | Mass: 752 kg
231/560BKd: 560 mm | D: 920 mm | B: 280 mm | Cr: 7650 kN | C0r: 15500 kN | Mass: 752 kg
231/600Bd: 600 mm | D: 980 mm | B: 300 mm | Cr: 9000 kN | C0r: 18400 kN | Mass: 908 kg
231/600BKd: 600 mm | D: 980 mm | B: 300 mm | Cr: 9000 kN | C0r: 18400 kN | Mass: 908 kg
231/630Bd: 630 mm | D: 1030 mm | B: 315 mm | Cr: 9600 kN | C0r: 19900 kN | Mass: 1050 kg
231/630BKd: 630 mm | D: 1030 mm | B: 315 mm | Cr: 9600 kN | C0r: 19900 kN | Mass: 1050 kg
231/670Bd: 670 mm | D: 1090 mm | B: 336 mm | Cr: 11000 kN | C0r: 22800 kN | Mass: 1250 kg
231/670BKd: 670 mm | D: 1090 mm | B: 336 mm | Cr: 11000 kN | C0r: 22800 kN | Mass: 1250 kg
231/710Bd: 710 mm | D: 1150 mm | B: 345 mm | Cr: 11600 kN | C0r: 24900 kN | Mass: 1420 kg
231/710BKd: 710 mm | D: 1150 mm | B: 345 mm | Cr: 11600 kN | C0r: 24900 kN | Mass: 1420 kg
231/750Bd: 750 mm | D: 1220 mm | B: 365 mm | Cr: 12800 kN | C0r: 27200 kN | Mass: 1700 kg
231/750BKd: 750 mm | D: 1220 mm | B: 365 mm | Cr: 12800 kN | C0r: 27200 kN | Mass: 1700 kg
231/800Bd: 800 mm | D: 1280 mm | B: 375 mm | Cr: 14400 kN | C0r: 31000 kN | Mass: 1890 kg
231/800BKd: 800 mm | D: 1280 mm | B: 375 mm | Cr: 14400 kN | C0r: 31000 kN | Mass: 1890 kg
231/850Bd: 850 mm | D: 1360 mm | B: 400 mm | Cr: 15500 kN | C0r: 34000 kN | Mass: 2270 kg
231/850BKd: 850 mm | D: 1360 mm | B: 400 mm | Cr: 15500 kN | C0r: 34000 kN | Mass: 2270 kg
231/900Bd: 900 mm | D: 1420 mm | B: 412 mm | Cr: 16800 kN | C0r: 38000 kN | Mass: 2500 kg
231/900BKd: 900 mm | D: 1420 mm | B: 412 mm | Cr: 16800 kN | C0r: 38000 kN | Mass: 2500 kg

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