• KOYO Double Direction Angular Contact Thrust Ball Bearings (2344)
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KOYO Double Direction Angular Contact Thrust Ball Bearings (2344)

KOYO Double Direction Angular Contact Thrust Ball Bearings (2344)

Double direction angular contact thrust ball bearings (2344, 2347 series) for machine tool spindles, used together with double-row cylindrical roller bearings to support axial loads in both directions with high rigidity.

Key features

  • 60 deg contact angle for high axial rigidity
  • Carries axial loads in both directions
  • Paired with NN30 double-row cylindrical roller bearings
  • High-precision machine tool spindle bearing

Specifications

Bearing type Double direction angular contact thrust ball bearing
Series 2344, 2347
Application Machine tool spindles
Source KOYO Special Bearings catalogue, p. C50-C55
234405B d: 25 mm | D: 47 mm | T: 28 mm | Ca: 13.2 kN | C0a: 19.9 kN | Mass: 0.194 kg
234406B d: 30 mm | D: 55 mm | T: 32 mm | Ca: 14.0 kN | C0a: 23.6 kN | Mass: 0.296 kg
234407B d: 35 mm | D: 62 mm | T: 34 mm | Ca: 20.8 kN | C0a: 34.8 kN | Mass: 0.388 kg
234408B d: 40 mm | D: 68 mm | T: 36 mm | Ca: 23.9 kN | C0a: 41.7 kN | Mass: 0.475 kg
234409B d: 45 mm | D: 75 mm | T: 38 mm | Ca: 26.0 kN | C0a: 50.1 kN | Mass: 0.602 kg
234410B d: 50 mm | D: 80 mm | T: 38 mm | Ca: 26.8 kN | C0a: 54.4 kN | Mass: 0.654 kg
234411B d: 55 mm | D: 90 mm | T: 44 mm | Ca: 37.2 kN | C0a: 71.7 kN | Mass: 0.978 kg
234412B d: 60 mm | D: 95 mm | T: 44 mm | Ca: 37.6 kN | C0a: 75.2 kN | Mass: 1.04 kg
234413B d: 65 mm | D: 100 mm | T: 44 mm | Ca: 39.0 kN | C0a: 81.8 kN | Mass: 1.11 kg
234414B d: 70 mm | D: 110 mm | T: 48 mm | Ca: 47.5 kN | C0a: 103 kN | Mass: 1.52 kg
234415B d: 75 mm | D: 115 mm | T: 48 mm | Ca: 49.1 kN | C0a: 111 kN | Mass: 1.62 kg
234416B d: 80 mm | D: 125 mm | T: 54 mm | Ca: 57.6 kN | C0a: 132 kN | Mass: 2.19 kg
234417B d: 85 mm | D: 130 mm | T: 54 mm | Ca: 58.2 kN | C0a: 137 kN | Mass: 2.30 kg
234418B d: 90 mm | D: 140 mm | T: 60 mm | Ca: 67.4 kN | C0a: 160 kN | Mass: 3.03 kg
234419B d: 95 mm | D: 145 mm | T: 60 mm | Ca: 68.0 kN | C0a: 166 kN | Mass: 3.17 kg
239420B d: 100 mm | D: 140 mm | T: 48 mm | Ca: 52.2 kN | C0a: 135 kN | Mass: 2.08 kg
234420B d: 100 mm | D: 150 mm | T: 60 mm | Ca: 68.7 kN | C0a: 172 kN | Mass: 3.33 kg
239421B d: 105 mm | D: 145 mm | T: 48 mm | Ca: 53.6 kN | C0a: 143 kN | Mass: 2.16 kg
234421B d: 105 mm | D: 160 mm | T: 66 mm | Ca: 78.8 kN | C0a: 199 kN | Mass: 4.15 kg
239422B d: 110 mm | D: 150 mm | T: 48 mm | Ca: 53.9 kN | C0a: 148 kN | Mass: 2.25 kg
234422B d: 110 mm | D: 170 mm | T: 72 mm | Ca: 95.9 kN | C0a: 235 kN | Mass: 5.38 kg
239424B d: 120 mm | D: 165 mm | T: 54 mm | Ca: 64.9 kN | C0a: 185 kN | Mass: 3.12 kg
234424B d: 120 mm | D: 180 mm | T: 72 mm | Ca: 98.3 kN | C0a: 252 kN | Mass: 5.77 kg
239426B d: 130 mm | D: 180 mm | T: 60 mm | Ca: 75.0 kN | C0a: 217 kN | Mass: 4.19 kg
234426B d: 130 mm | D: 200 mm | T: 84 mm | Ca: 139 kN | C0a: 340 kN | Mass: 8.63 kg
239428B d: 140 mm | D: 190 mm | T: 60 mm | Ca: 75.9 kN | C0a: 229 kN | Mass: 4.47 kg
234428B d: 140 mm | D: 210 mm | T: 84 mm | Ca: 144 kN | C0a: 366 kN | Mass: 9.18 kg
239430B d: 150 mm | D: 210 mm | T: 72 mm | Ca: 107 kN | C0a: 312 kN | Mass: 7.01 kg
234430B d: 150 mm | D: 225 mm | T: 90 mm | Ca: 147 kN | C0a: 394 kN | Mass: 11.3 kg
239432B d: 160 mm | D: 220 mm | T: 72 mm | Ca: 109 kN | C0a: 329 kN | Mass: 7.40 kg
234432B d: 160 mm | D: 240 mm | T: 96 mm | Ca: 173 kN | C0a: 460 kN | Mass: 13.3 kg
239434B d: 170 mm | D: 230 mm | T: 72 mm | Ca: 111 kN | C0a: 346 kN | Mass: 7.79 kg
234434B d: 170 mm | D: 260 mm | T: 108 mm | Ca: 203 kN | C0a: 547 kN | Mass: 18.1 kg
239436B d: 180 mm | D: 250 mm | T: 84 mm | Ca: 157 kN | C0a: 460 kN | Mass: 11.3 kg
234436B d: 180 mm | D: 280 mm | T: 120 mm | Ca: 234 kN | C0a: 642 kN | Mass: 24.9 kg
239438B d: 190 mm | D: 260 mm | T: 84 mm | Ca: 157 kN | C0a: 474 kN | Mass: 11.9 kg
234438B d: 190 mm | D: 290 mm | T: 120 mm | Ca: 237 kN | C0a: 665 kN | Mass: 25.0 kg
239440B d: 200 mm | D: 280 mm | T: 96 mm | Ca: 185 kN | C0a: 557 kN | Mass: 16.6 kg
234440B d: 200 mm | D: 310 mm | T: 132 mm | Ca: 279 kN | C0a: 771 kN | Mass: 32.1 kg
239444B d: 220 mm | D: 300 mm | T: 96 mm | Ca: 191 kN | C0a: 606 kN | Mass: 18.0 kg
234444B d: 220 mm | D: 340 mm | T: 144 mm | Ca: 334 kN | C0a: 939 kN | Mass: 42.0 kg
239448B d: 240 mm | D: 320 mm | T: 96 mm | Ca: 196 kN | C0a: 655 kN | Mass: 19.1 kg
234448B d: 240 mm | D: 360 mm | T: 144 mm | Ca: 342 kN | C0a: 1 010 kN | Mass: 45.0 kg
239452B d: 260 mm | D: 360 mm | T: 120 mm | Ca: 261 kN | C0a: 869 kN | Mass: 33.5 kg
234452B d: 260 mm | D: 400 mm | T: 164 mm | Ca: 406 kN | C0a: 1 270 kN | Mass: 65.8 kg
239456B d: 280 mm | D: 380 mm | T: 120 mm | Ca: 265 kN | C0a: 915 kN | Mass: 35.7 kg
234456B d: 280 mm | D: 420 mm | T: 164 mm | Ca: 417 kN | C0a: 1 360 kN | Mass: 69.8 kg
239460B d: 300 mm | D: 420 mm | T: 144 mm | Ca: 352 kN | C0a: 1 150 kN | Mass: 56.1 kg
234460B d: 300 mm | D: 460 mm | T: 190 mm | Ca: 476 kN | C0a: 1 630 kN
239464B d: 320 mm | D: 440 mm | T: 144 mm | Ca: 361 kN | C0a: 1 220 kN | Mass: 59.2 kg
234464B d: 320 mm | D: 480 mm | T: 190 mm | Ca: 479 kN | C0a: 1 680 kN
239468B d: 340 mm | D: 460 mm | T: 144 mm | Ca: 368 kN | C0a: 1 290 kN | Mass: 63.1 kg
Thrust BearingsKOYO
52 product codes available in this family
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KOYO Double Direction Angular Contact Thrust Ball Bearings (2344)

Brand KOYO·Thrust Bearings

Available part numbers (52)

234405B, 234406B, 234407B, 234408B, 234409B, 234410B, 234411B, 234412B, 234413B, 234414B + 42 more — see full table ↓

How to order

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Product codes & specifications
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Product codeSpec
234405Bd: 25 mm | D: 47 mm | T: 28 mm | Ca: 13.2 kN | C0a: 19.9 kN | Mass: 0.194 kg
234406Bd: 30 mm | D: 55 mm | T: 32 mm | Ca: 14.0 kN | C0a: 23.6 kN | Mass: 0.296 kg
234407Bd: 35 mm | D: 62 mm | T: 34 mm | Ca: 20.8 kN | C0a: 34.8 kN | Mass: 0.388 kg
234408Bd: 40 mm | D: 68 mm | T: 36 mm | Ca: 23.9 kN | C0a: 41.7 kN | Mass: 0.475 kg
234409Bd: 45 mm | D: 75 mm | T: 38 mm | Ca: 26.0 kN | C0a: 50.1 kN | Mass: 0.602 kg
234410Bd: 50 mm | D: 80 mm | T: 38 mm | Ca: 26.8 kN | C0a: 54.4 kN | Mass: 0.654 kg
234411Bd: 55 mm | D: 90 mm | T: 44 mm | Ca: 37.2 kN | C0a: 71.7 kN | Mass: 0.978 kg
234412Bd: 60 mm | D: 95 mm | T: 44 mm | Ca: 37.6 kN | C0a: 75.2 kN | Mass: 1.04 kg
234413Bd: 65 mm | D: 100 mm | T: 44 mm | Ca: 39.0 kN | C0a: 81.8 kN | Mass: 1.11 kg
234414Bd: 70 mm | D: 110 mm | T: 48 mm | Ca: 47.5 kN | C0a: 103 kN | Mass: 1.52 kg
234415Bd: 75 mm | D: 115 mm | T: 48 mm | Ca: 49.1 kN | C0a: 111 kN | Mass: 1.62 kg
234416Bd: 80 mm | D: 125 mm | T: 54 mm | Ca: 57.6 kN | C0a: 132 kN | Mass: 2.19 kg
234417Bd: 85 mm | D: 130 mm | T: 54 mm | Ca: 58.2 kN | C0a: 137 kN | Mass: 2.30 kg
234418Bd: 90 mm | D: 140 mm | T: 60 mm | Ca: 67.4 kN | C0a: 160 kN | Mass: 3.03 kg
234419Bd: 95 mm | D: 145 mm | T: 60 mm | Ca: 68.0 kN | C0a: 166 kN | Mass: 3.17 kg
239420Bd: 100 mm | D: 140 mm | T: 48 mm | Ca: 52.2 kN | C0a: 135 kN | Mass: 2.08 kg
234420Bd: 100 mm | D: 150 mm | T: 60 mm | Ca: 68.7 kN | C0a: 172 kN | Mass: 3.33 kg
239421Bd: 105 mm | D: 145 mm | T: 48 mm | Ca: 53.6 kN | C0a: 143 kN | Mass: 2.16 kg
234421Bd: 105 mm | D: 160 mm | T: 66 mm | Ca: 78.8 kN | C0a: 199 kN | Mass: 4.15 kg
239422Bd: 110 mm | D: 150 mm | T: 48 mm | Ca: 53.9 kN | C0a: 148 kN | Mass: 2.25 kg
234422Bd: 110 mm | D: 170 mm | T: 72 mm | Ca: 95.9 kN | C0a: 235 kN | Mass: 5.38 kg
239424Bd: 120 mm | D: 165 mm | T: 54 mm | Ca: 64.9 kN | C0a: 185 kN | Mass: 3.12 kg
234424Bd: 120 mm | D: 180 mm | T: 72 mm | Ca: 98.3 kN | C0a: 252 kN | Mass: 5.77 kg
239426Bd: 130 mm | D: 180 mm | T: 60 mm | Ca: 75.0 kN | C0a: 217 kN | Mass: 4.19 kg
234426Bd: 130 mm | D: 200 mm | T: 84 mm | Ca: 139 kN | C0a: 340 kN | Mass: 8.63 kg
239428Bd: 140 mm | D: 190 mm | T: 60 mm | Ca: 75.9 kN | C0a: 229 kN | Mass: 4.47 kg
234428Bd: 140 mm | D: 210 mm | T: 84 mm | Ca: 144 kN | C0a: 366 kN | Mass: 9.18 kg
239430Bd: 150 mm | D: 210 mm | T: 72 mm | Ca: 107 kN | C0a: 312 kN | Mass: 7.01 kg
234430Bd: 150 mm | D: 225 mm | T: 90 mm | Ca: 147 kN | C0a: 394 kN | Mass: 11.3 kg
239432Bd: 160 mm | D: 220 mm | T: 72 mm | Ca: 109 kN | C0a: 329 kN | Mass: 7.40 kg
234432Bd: 160 mm | D: 240 mm | T: 96 mm | Ca: 173 kN | C0a: 460 kN | Mass: 13.3 kg
239434Bd: 170 mm | D: 230 mm | T: 72 mm | Ca: 111 kN | C0a: 346 kN | Mass: 7.79 kg
234434Bd: 170 mm | D: 260 mm | T: 108 mm | Ca: 203 kN | C0a: 547 kN | Mass: 18.1 kg
239436Bd: 180 mm | D: 250 mm | T: 84 mm | Ca: 157 kN | C0a: 460 kN | Mass: 11.3 kg
234436Bd: 180 mm | D: 280 mm | T: 120 mm | Ca: 234 kN | C0a: 642 kN | Mass: 24.9 kg
239438Bd: 190 mm | D: 260 mm | T: 84 mm | Ca: 157 kN | C0a: 474 kN | Mass: 11.9 kg
234438Bd: 190 mm | D: 290 mm | T: 120 mm | Ca: 237 kN | C0a: 665 kN | Mass: 25.0 kg
239440Bd: 200 mm | D: 280 mm | T: 96 mm | Ca: 185 kN | C0a: 557 kN | Mass: 16.6 kg
234440Bd: 200 mm | D: 310 mm | T: 132 mm | Ca: 279 kN | C0a: 771 kN | Mass: 32.1 kg
239444Bd: 220 mm | D: 300 mm | T: 96 mm | Ca: 191 kN | C0a: 606 kN | Mass: 18.0 kg
234444Bd: 220 mm | D: 340 mm | T: 144 mm | Ca: 334 kN | C0a: 939 kN | Mass: 42.0 kg
239448Bd: 240 mm | D: 320 mm | T: 96 mm | Ca: 196 kN | C0a: 655 kN | Mass: 19.1 kg
234448Bd: 240 mm | D: 360 mm | T: 144 mm | Ca: 342 kN | C0a: 1 010 kN | Mass: 45.0 kg
239452Bd: 260 mm | D: 360 mm | T: 120 mm | Ca: 261 kN | C0a: 869 kN | Mass: 33.5 kg
234452Bd: 260 mm | D: 400 mm | T: 164 mm | Ca: 406 kN | C0a: 1 270 kN | Mass: 65.8 kg
239456Bd: 280 mm | D: 380 mm | T: 120 mm | Ca: 265 kN | C0a: 915 kN | Mass: 35.7 kg
234456Bd: 280 mm | D: 420 mm | T: 164 mm | Ca: 417 kN | C0a: 1 360 kN | Mass: 69.8 kg
239460Bd: 300 mm | D: 420 mm | T: 144 mm | Ca: 352 kN | C0a: 1 150 kN | Mass: 56.1 kg
234460Bd: 300 mm | D: 460 mm | T: 190 mm | Ca: 476 kN | C0a: 1 630 kN
239464Bd: 320 mm | D: 440 mm | T: 144 mm | Ca: 361 kN | C0a: 1 220 kN | Mass: 59.2 kg
234464Bd: 320 mm | D: 480 mm | T: 190 mm | Ca: 479 kN | C0a: 1 680 kN
239468Bd: 340 mm | D: 460 mm | T: 144 mm | Ca: 368 kN | C0a: 1 290 kN | Mass: 63.1 kg

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