drawn cup needle roller bearings ntn type of bearing applied shaft composition of diameter mm nominal bearing number nominal bearing number code items and dimensions remarks bk bk t2 bk 20 20 c tail code width bk2020c inscribed circle diameter type code inscribed circle diameter 20 width 20 c welding cage closed end 3 50 the bearings with tail code t2 using polyamide resin cage shall be used at allowable temperature 120°c and under continuous running at 100°c and less bk l standard series bk 20 18 l tail code width bk2018l inscribed circle diameter type code inscribed circle diameter 20 width 18 l single side seal closed end single side seal 12 50 this seal type tail code l is internally filled up with lithium soap base grease the operating temperature shall range from -25 to 100°c maximum to prevent deterioration of the seal and filled-up grease bk zwd bk 20 30 zw d tail code tail code bk2030zwd width inscribed circle diameter type code inscribed circle diameter 20 width 30 zw
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drawn cup needle roller bearings ntn bearing tolerances and measuring methods the outer ring of drawn cup needle roller bearing is so thin-walled that deformation thereof to a certain extent is unavoidable in the manufacturing processes particularly in the heat-treating process however the outer ring is so designed that it is reformed normally from such deformation when being press-fitted in a housing with specific dimensional accuracy and as a result it can have the accuracy required to fulfill its specific function hence it is meaningless to measure the dimensional accuracy of bearing itself before being press-fitted so the following measuring method is used a bearing to be measured is press-fitted in a linkage of specific dimension 20mm or more in wall thickness and thereafter the inscribed circle diameter fw is measured using a plug gauge or a taper gauge to evaluate the bearing accuracy tables 4 to 7 show the dimensional tolerances for the bore diameter of each ring gauge and the
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drawn cup needle roller bearings type hk type hk zwd type hmk type bk type bk zwd ntn c c d fw d fw type hk type hmk opened end type type hk zwd fw 3 10mm boundary dimensions mm fw d c 0 -0.2 basic load ratings dynamic static dynamic static n kgf cr cor cr cor limiting speeds r/min grease oil bearing numbers mass kg appropriate1 inner ring c1 max open end design closed end design approx as a reference 3 6.5 6.5 8 8 9 9 10 10 11 11 12 12 6 6 8 8 9 9 9 9 9 9 10 10 10 15 20 10 10 12 12 12 16 10 10 12 12 15 15 10 12 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 0.8 925 925 1 770 1 770 2 640 2 640 2 660 2 660 3 400 3 400 3 850 3 850 3 800 6 600 9 050 4 750 4 750 5 650 5 650 5 300 7 400 4 500 4 500 5 900 5 900 7 100 7 100 4 250 5 600 565 565 1 270 1 270 2 190 2 190 2 280 2 280 3 250 3 250 3 950 3 950 2 870 5 800 8 750 5 300 5 300 6 650 6 650 4 450 6 850 5 100 5 100 7 250 7 250 9 150 9 150 3 450 4 850 94 94 180 180 269 269 272 272 345 345 395 395 390 675 925 485 485 575 575 540 755 460 460 605 605
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drawn cup needle roller bearings type hk type hk zwd type hmk type bk type bk zwd ntn c c d fw d fw type hk type hmk opened end type type hk zwd fw 16 20mm boundary dimensions mm fw d c 0 -0.2 basic load ratings dynamic static dynamic static n kgf cr cor cr cor limiting speeds r/min grease oil bearing numbers mass kg appropriate1 inner ring c1 max open end design closed end design approx as a reference 22 22 22 16 22 22 24 24 23 23 17 24 24 24 24 24 24 24 18 25 25 25 25 25 25 19 27 27 26 26 20 26 26 26 26 12 16 16 22 22 16 20 12 12 15 20 25 12 12 16 16 13 15 17 19 20 25 16 20 12 12 16 16 20 20 2.7 2.7 2.7 7 750 11 100 11 100 13 300 13 300 12 400 15 600 8 500 9 700 795 990 10 000 15 000 10 000 15 000 10 000 15 000 10 000 15 000 10 000 15 000 10 000 15 000 10 000 15 000 9 500 14 000 9 500 14 000 9 500 14 000 9 500 14 000 9 500 14 000 8 500 13 000 8 500 13 000 8 500 13 000 8 500 13 000 8 500 13 000 8 500 13 000 8 500 13 000 8 500 13 000 8 500 13 000 8 500 13 000 8 500 13 000 8 500 13 000
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drawn cup needle roller bearings type hk type hk zwd type hmk type hmk zwd type bk type bk zwd ntn c c d fw d fw type hk type hmk opened end type type hk zwd type hmk zwd fw 25 30mm boundary dimensions mm fw d c 0 -0.2 basic load ratings dynamic static dynamic static n kgf cr cor cr cor limiting speeds r/min grease oil bearing numbers mass kg appropriate1 inner ring c1 max open end design closed end design approx as a reference 32 33 25 33 33 33 33 26 34 34 35 35 28 35 35 37 37 29 38 38 37 37 37 37 37 37 30 37 37 37 37 40 40 40 40 38 10 15 20 25 30 16 20 16 16 20 20 20 30 20 30 12 12 16 16 20 20 26 26 38 38 13 15 20 25 2.7 35 000 9 150 15 200 21 800 26 700 32 500 17 200 21 800 17 300 65 500 3 550 6 700 10 400 935 1 060 19 900 1 550 2 030 31 500 2 220 3 200 41 000 2 720 4 200 53 000 3 300 5 400 23 300 1 750 2 380 31 500 2 220 3 200 27 600 1 760 2 820 27 600 1 760 2 820 36 000 2 170 3 700 36 000 2 170 3 700 32 500 2 410 3 350 54 500 3 600 5 550 35 000 2 510 3 550 54 000 3 550 5 550 19 5
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drawn cup needle roller bearings type hk type hmk type hmk zwd type bk ntn c c d fw d fw type hk type hmk opened end type type hmk zwd fw 40 50mm boundary dimensions mm fw d c 0 -0.2 basic load ratings dynamic static dynamic static n kgf cr cor cr cor limiting speeds r/min grease oil bearing numbers mass kg appropriate1 inner ring c1 max open end design closed end design approx as a reference 40 50 50 52 52 52 52 55 55 55 55 58 58 58 58 62 30 40 16 16 20 20 20 25 30 40 20 20 25 25 12 15 20 25 30 40 45 2.7 2.7 2.7 2.7 49 000 85 000 5 000 8 700 4 000 4 000 3 700 3 700 3 700 3 700 3 700 3 700 3 700 3 700 3 200 3 200 3 200 3 200 3 200 3 200 3 200 3 200 3 200 3 200 3 200 6 000 6 000 5 500 5 500 5 500 5 500 5 500 5 500 5 500 5 500 4 800 4 800 4 800 4 800 4 800 4 800 4 800 4 800 4 800 4 800 4 800 hmk4030 hmk4040zwd hk4516 bk4516 hk4520 bk4520 hmk4520 hmk4525 hmk4530 hmk4540zwd hk5020 bk5020 hk5025 bk5025 hmk5012 hmk5015 hmk5020 hmk5025 hmk5030b hmk5040zwd hmk5045zwbd 0.112 ir35 0.150 0.046 i
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drawn cup needle roller bearings sealed type type hk l type hmk l type hk ll type hmk ll type bk l ntn type hk l type hmk l type hk ll type hmk ll opened end and single-side seal type opened end and double-side seal type fw 8 25mm boundary dimensions mm c1 0 0.2 basic load ratings dynamic static dynamic static n kgf c3 max cr cor cr cor fw d c2 0 0.2 limiting speeds r/min grease bearing numbers open end single seal open end double seal closed end single seal 8 10 12 15 17 18 19 20 22 21 22 22 12 12 14 14 14 19 14 13 18 14 23 18 14 18 20 19 14 14 16 16 16 22 16 16 21 16 26 21 16 21 23 22 16 2.7 2.7 2.7 3 800 4 250 6 600 7 100 7 200 11 500 7 500 6 100 10 900 7 750 15 600 12 100 8 300 12 000 13 800 13 900 9 250 2.7 13 000 13 000 17 700 9 750 2.7 13 600 13 400 18 200 18 800 11 800 2.7 15 900 2 870 3 450 7 300 6 900 390 435 675 725 293 350 745 705 865 1 220 930 610 1 300 990 1 860 1 530 1 110 1 540 1 830 1 660 1 330 2 050 1 760 2 610 1 460 2 250 1 890 2 790 2 970 1 660 2 450 10 000 10 000 1
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drawn cup needle roller bearings sealed type type hk l type hmk l type hk ll type hmk ll type bk l ntn type hk l type hmk l type hk ll type hmk ll opened end and single-side seal type opened end and double-side seal type fw 25 50mm boundary dimensions mm c1 0 0.2 basic load ratings dynamic static dynamic static n kgf c3 max cr cor cr cor fw d c2 0 0.2 limiting speeds r/min grease bearing numbers open end single seal open end double seal closed end single seal 25 33 33 35 37 37 18 23 21 26 20 15 800 21 800 17 300 23 600 13 000 2.7 18 100 24 200 31 000 27 500 14 000 2.7 19 700 20 200 36 000 38 500 15 100 2.7 21 100 23 100 41 000 2.7 21 600 33 000 31 500 48 000 21 000 31 500 27 600 32 500 19 500 30 000 34 500 47 000 38 000 22 800 35 000 26 200 54 500 61 000 26 000 40 000 32 500 67 500 43 000 53 000 63 000 82 500 1 610 2 220 1 760 2 410 1 320 1 850 2 470 3 150 2 800 1 430 2 000 2 060 3 650 3 900 1 540 2 150 2 350 4 150 2 210 3 350 3 200 4 900 2 140 3 200 2 820 3 350 1 990 3 050 3 500 4 800
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drawn cup needle roller bearings inch series type dcl ntn fw 6.350 15.875mm boundary dimensions mm 25.4mm fw d c 0 0.2 basic load ratings dynamic static dynamic static n kgf cr cor cr cor limiting speeds r/min grease bearing numbers mass kg appropriate1 inner ring oil approx as a reference 11.112 16 6.350 4 11.112 16 11.112 16 12.700 2 7.938 16 12.700 2 12.700 2 12.700 2 14.288 16 9.525 8 14.288 16 14.288 16 14.288 16 11.112 16 15.875 8 17.462 16 17.462 16 12.700 2 6.350 4 7.938 16 11.112 16 7.938 16 9.525 8 11.112 16 14.288 16 7.938 16 9.525 8 12.700 2 15.875 8 12.700 2 7.938 16 9.525 8 1 580 2 160 3 550 2 940 3 900 4 800 6 500 3 100 4 100 5 900 7 500 6 450 3 550 4 700 5 800 6 700 8 550 10 400 3 800 5 050 6 250 7 200 9 200 11 200 4 050 6 650 7 700 9 800 11 900 1 110 1 670 3 150 2 610 3 750 4 950 7 250 2 910 4 200 6 650 9 050 7 800 3 700 5 350 7 050 8 500 11 600 14 900 4 250 6 150 8 000 9 650 13 200 17 000 4 750 9 000 10 800 14 800 19 000 161 221 360 300 400 490 665 315 420 600 765 6
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drawn cup needle roller bearings inch series type dcl ntn fw 25.400 41.275mm boundary dimensions mm 25.4mm fw d c 0 0.2 dynamic basic load ratings static dynamic static n kgf cor cr cor limiting speeds r/min grease bearing numbers mass kg appropriate1 inner ring oil approx as a reference cr 25.4001 31.7501 4 25.4001 25 400 44 000 58 000 24 600 10 600 18 200 34 000 50 500 66 500 54 000 19 000 27 000 35 500 53 000 70 000 21 400 40 000 59 500 78 500 22 800 29 700 40 000 50 500 60 500 82 000 24 900 32 500 66 500 90 000 2 590 3 200 1 620 830 1 260 2 050 2 790 3 450 3 350 1 280 1 670 2 070 2 830 3 500 1 360 2 210 3 000 3 750 1 750 2 150 2 710 3 250 3 750 4 750 1 840 2 260 3 950 5 000 4 500 5 900 2 510 1 080 1 850 3 450 5 150 6 800 5 500 1 940 2 750 3 600 5 400 7 100 2 180 4 050 6 050 8 000 2 320 3 050 4 100 5 150 6 200 8 350 2 540 3 300 6 800 9 150 6 500 6 500 6 000 5 500 5 500 5 500 5 500 5 500 5 500 5 000 5 000 5 000 5 000 5 000 4 700 4 700 4 700 4 700 4 300 4 300 4 300 4 300 4 300 4 30
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drawn cup needle roller bearings for universal joint type hck ntn standard type waffle type fw 10 20mm boundary dimensions dynamic mm fw dcbc1 cr basic load ratings static dynamic static n kgf cor cr cor bearing numbers mass kg standard type waffle type approx 10 11.656 13 14 16 18 18 20 15 17.1 19 20 22 24 24.6 27.9 9.35 11.85 11.85 11.85 12.85 13.85 13.85 15.82 7.6 9.6 9.6 9.6 10.6 11.6 11.6 13.1 1.75 2.25 2.25 2.25 2.25 2.25 2.25 2.72 6 200 8 850 10 000 10 500 12 200 13 900 13 900 17 800 9 250 13 800 15 000 16 600 20 700 25 300 25 300 31 000 635 905 1 020 1 070 1 240 1 420 1 420 1 810 940 1 400 1 530 1 690 2 110 2 580 2 580 3 150 hck1217 hck1319 hck1420 hck1622 hck1824 hck1825 hck2028 hck1015 0.007 0.011 0.013 0.014 0.017 0.021 0.025 0.037 b-52
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