Needle Bearing K Series
Needle Roller Bearings K Series Iintroduction
Needle bearing K series, also known as needleless needle bearing, is a needle roller bearing with only needle roller and cage. Needle Bearing K Series is mostly used for connecting rods and small ends of gearboxes, motorcycles and automobiles. Because the internal temperature of the cylinder rises, the bearing is resistant to high temperatures.
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Needle Symbol
Subject | Symbol | Description |
Seal type | ZZ | Metal shields on both sides. |
2RS | Rubber seals on both sides. | |
Z | Metal shield on one side. | |
RS | Rubber seal on one side. |
Structure Drawing Of Needle Roller Bearing K Series

Model List And Dimensions Of Needle Roller Bearings K Series
Bearing Number | Nominal Bearing Dimensions(mm) | Bearing Weight (kg) | ||
Fw | Ew | Bc | ||
K3X5X7 | 3 | 5 | 7 | 0.0003 |
K3X5X9 | 3 | 5 | 9 | 0.0004 |
K3X6X7 | 3 | 6 | 7 | 0.0004 |
K4X7X7 | 4 | 7 | 7 | 0.0005 |
K4X7X10 | 4 | 7 | 10 | 0.0007 |
K5X8X8 | 5 | 8 | 8 | 0.0007 |
K5X8X10 | 5 | 8 | 10 | 0.0009 |
K6X9X8 | 6 | 9 | 8 | 0.0008 |
K6X9X10 | 6 | 9 | 10 | 0.0011 |
K6X10X13 | 6 | 10 | 13 | 0.0019 |
K7X9X7 | 7 | 9 | 7 | 0.0006 |
K7X10X8 | 7 | 10 | 8 | 0.0017 |
K8X11X8 | 8 | 11 | 8 | 0.0018 |
K8X11X10 | 8 | 11 | 10 | 0.002 |
K8X11X13 | 8 | 11 | 13 | 0.0032 |
K8X12X10 | 8 | 12 | 10 | 0.0035 |
K9X12X10 | 9 | 12 | 10 | 0.0029 |
K9X12X13 | 9 | 12 | 13 | 0.0038 |
K10X13X10 | 10 | 13 | 10 | 0.0032 |
K10X13X13 | 10 | 13 | 13 | 0.0041 |
K10X13X16 | 10 | 13 | 16 | 0.0051 |
K10X14X10 | 10 | 14 | 10 | 0.0041 |
K10X16X12 | 10 | 16 | 12 | 0.0081 |
K12X15X10 | 12 | 15 | 10 | 0.0035 |
K12X15X13 | 12 | 15 | 13 | 0.0045 |
K12X16X13 | 12 | 16 | 13 | 0.0063 |
K12X17X13 | 12 | 17 | 13 | 0.0081 |
K12X18X12 | 12 | 18 | 12 | 0.0093 |
K14X18X10 | 14 | 18 | 10 | 0.004 |
K14X18X13 | 14 | 18 | 13 | 0.0065 |
K14X18X15 | 14 | 18 | 15 | 0.0083 |
K14X18X17 | 14 | 18 | 17 | 0.008 |
K14X20X12 | 14 | 20 | 12 | 0.0085 |
K15X18X17 | 15 | 18 | 17 | 0.0072 |
K15X19X10 | 15 | 19 | 10 | 0.005 |
K15X19X13 | 15 | 19 | 13 | 0.007 |
K15X19X17 | 15 | 19 | 17 | 0.0095 |
K15X20X13 | 15 | 20 | 13 | 0.007 |
K15X21X15 | 15 | 21 | 15 | 0.011 |
K15X21X21 | 15 | 21 | 21 | 0.017 |
K16X20X10 | 16 | 20 | 10 | 0.0055 |
K16X20X13 | 16 | 20 | 13 | 0.0075 |
K16X20X17 | 16 | 20 | 17 | 0.01 |
K16X22X12 | 16 | 22 | 12 | 0.0100 |
K16X22X16 | 16 | 22 | 16 | 0.0120 |
K16X22X20 | 16 | 22 | 20 | 0.0170 |
K16X24X20 | 16 | 24 | 20 | 0.0220 |
K17X21X10 | 17 | 21 | 10 | 0.0055 |
K17X21X13 | 17 | 21 | 13 | 0.0065 |
K17X21X17 | 17 | 21 | 17 | 0.0095 |
K18X22X10 | 18 | 22 | 10 | 0.0060 |
K18X22X13 | 18 | 22 | 13 | 0.0080 |
K18X22X17 | 18 | 22 | 17 | 0.0110 |
K18X24X12 | 18 | 24 | 12 | 0.0120 |
K18X24X13 | 18 | 24 | 13 | 0.0130 |
K18X25X22 | 18 | 25 | 22 | 0.0230 |
K19X23X13 | 19 | 23 | 13 | 0.0080 |
K19X23X17 | 19 | 23 | 17 | 0.0110 |
K20X24X10 | 20 | 24 | 10 | 0.0065 |
K20X24X13 | 20 | 24 | 13 | 0.0090 |
K20X24X17 | 20 | 24 | 17 | 0.0120 |
K20X26X12 | 20 | 26 | 12 | 0.0110 |
K20X26X13 | 20 | 26 | 13 | 0.0120 |
K20X26X17 | 20 | 26 | 17 | 0.0160 |
K20X26X20 | 20 | 26 | 20 | 0.0190 |
K20X28X16 | 20 | 28 | 16 | 0.0200 |
K20X28X20 | 20 | 28 | 20 | 0.0270 |
K20X28X25 | 20 | 28 | 25 | 0.0320 |
K20X30X30 | 20 | 30 | 30 | 0.0490 |
K21X25X13 | 21 | 25 | 13 | 0.0090 |
K22X26X10 | 22 | 26 | 10 | 0.0075 |
K22X26X13 | 22 | 26 | 13 | 0.0095 |
K22X26X17 | 22 | 26 | 17 | 0.0120 |
K22X28X17 | 22 | 28 | 17 | 0.0180 |
K22X29X16 | 22 | 29 | 16 | 0.0160 |
K22X30X15 | 22 | 30 | 15 | 0.0260 |
K22X32X24 | 22 | 32 | 24 | 0.0430 |
K23X35X16 | 23 | 35 | 16 | 0.0450 |
K24X28X10 | 24 | 28 | 10 | 0.0085 |
K24X28X13 | 24 | 28 | 13 | 0.0100 |
K24X28X17 | 24 | 28 | 17 | 0.0130 |
K24X30X17 | 24 | 30 | 17 | 0.0190 |
K24X30X31 | 24 | 30 | 31 | 0.0320 |
K25X29X10 | 25 | 29 | 10 | 0.0085 |
K25X29X13 | 25 | 29 | 13 | 0.0110 |
K25X29X17 | 25 | 29 | 17 | 0.0140 |
K25X30X17 | 25 | 30 | 17 | 0.0160 |
K25X30X20 | 25 | 30 | 20 | 0.0180 |
K25X30X26 | 25 | 30 | 26 | 0.0190 |
K25X31X17 | 25 | 31 | 17 | 0.0190 |
K25X31X21 | 25 | 31 | 21 | 0.0200 |
K25X32X16 | 25 | 32 | 16 | 0.0210 |
K25X33X20 | 25 | 33 | 20 | 0.0330 |
K25X33X24 | 25 | 33 | 24 | 0.0390 |
K25X35X30 | 25 | 35 | 30 | 0.0650 |
K26X30X13 | 26 | 30 | 13 | 0.0110 |
K26X30X17 | 26 | 30 | 17 | 0.0150 |
K26X30X22 | 26 | 30 | 22 | 0.0120 |
K28X33X13 | 28 | 33 | 13 | 0.0130 |
K28X33X17 | 28 | 33 | 17 | 0.0170 |
K28X34X17 | 28 | 34 | 17 | 0.0240 |
K28X35X16 | 28 | 35 | 16 | 0.0240 |
K28X35X18 | 28 | 35 | 18 | 0.0270 |
K28X40X25 | 28 | 40 | 25 | 0.0700 |
K30X34X13 | 30 | 34 | 13 | 0.0140 |
K30X35X13 | 30 | 35 | 13 | 0.0140 |
K30X35X17 | 30 | 35 | 17 | 0.0190 |
K30X35X27 | 30 | 35 | 27 | 0.0300 |
K30X37X16 | 30 | 37 | 16 | 0.0270 |
K30X37X18 | 30 | 37 | 18 | 0.0300 |
K30X40X18 | 30 | 40 | 18 | 0.0480 |
K30X40X30 | 30 | 40 | 30 | 0.0730 |
K32X37X13 | 32 | 37 | 13 | 0.0180 |
K32X37X17 | 32 | 37 | 17 | 0.0190 |
K32X37X27 | 32 | 37 | 27 | 0.0300 |
K32X38X20 | 32 | 38 | 20 | 0.0300 |
K32X39X16 | 32 | 39 | 16 | 0.0370 |
K32X39X18 | 32 | 39 | 18 | 0.0310 |
K32X40X25 | 32 | 40 | 25 | 0.0490 |
K32X40X42 | 32 | 40 | 42 | 0.0970 |
K32X46X32 | 32 | 46 | 32 | 0.1190 |
K35X40X13 | 35 | 40 | 13 | 0.0190 |
K35X40X17 | 35 | 40 | 17 | 0.0210 |
K35X40X25 | 35 | 40 | 25 | 0.0310 |
K35X40X27 | 35 | 40 | 27 | 0.0410 |
K35X42X16 | 35 | 42 | 16 | 0.0340 |
K35X42X18 | 35 | 42 | 18 | 0.0340 |
K35X42X20 | 35 | 42 | 20 | 0.0370 |
K35X42X30 | 35 | 42 | 30 | 0.0670 |
K35X45X20 | 35 | 45 | 20 | 0.0560 |
K35X45X30 | 35 | 45 | 30 | 0.0800 |
K37X42X17 | 37 | 42 | 17 | 0.0220 |
K38X43X17 | 38 | 43 | 17 | 0.0290 |
K38X43X27 | 38 | 43 | 27 | 0.0430 |
K38X46X20 | 38 | 46 | 20 | 0.0470 |
K38X46X32 | 38 | 46 | 32 | 0.0760 |
K39X44X26 | 39 | 44 | 26 | 0.0450 |
K40X45X13 | 40 | 45 | 13 | 0.0220 |
K40X45X17 | 40 | 45 | 17 | 0.0310 |
K40X45X27 | 40 | 45 | 27 | 0.0460 |
K40X47X18 | 40 | 47 | 18 | 0.0390 |
K40X47X20 | 40 | 47 | 20 | 0.0420 |
K40X48X20 | 40 | 48 | 20 | 0.0490 |
K42X47X13 | 42 | 47 | 13 | 0.0180 |
K42X47X17 | 42 | 47 | 17 | 0.0320 |
K42X47X30 | 42 | 47 | 30 | 0.0540 |
K42X50X20 | 42 | 50 | 20 | 0.0530 |
K43X48X17 | 43 | 48 | 17 | 0.0300 |
K43X48X27 | 43 | 48 | 27 | 0.0500 |
K45X50X17 | 45 | 50 | 17 | 0.0340 |
K45X50X27 | 45 | 50 | 27 | 0.0510 |
K45X52X18 | 45 | 52 | 18 | 0.0420 |
K45X53X20 | 45 | 53 | 20 | 0.0550 |
K45X53X21 | 45 | 53 | 21 | 0.0600 |
K45X53X28 | 45 | 53 | 28 | 0.0810 |
K45X59X18 | 45 | 59 | 18 | 0.1050 |
K45X59X32 | 45 | 59 | 32 | 0.1480 |
K47X52X17 | 47 | 52 | 17 | 0.0350 |
K47X52X27 | 47 | 52 | 27 | 0.0510 |
K50X55X13.5 | 50 | 55 | 13.5 | 0.0300 |
K50X55X17 | 50 | 55 | 17 | 0.0350 |
Bearing Number | Nominal Bearing Dimensions(mm) | Bearing Weight (kg) | ||
Fw | Ew | Bc | ||
K50X55X20 | 50 | 55 | 20 | 0.0430 |
K50X55X30 | 50 | 55 | 30 | 0.0650 |
K50X57X18 | 50 | 57 | 18 | 0.0470 |
K50X58X20 | 50 | 58 | 20 | 0.0750 |
K50X58X25 | 50 | 58 | 25 | 0.0900 |
K52X57X12 | 52 | 57 | 12 | 0.0240 |
K55X60X20 | 55 | 60 | 20 | 0.0400 |
K55X60X27 | 55 | 60 | 27 | 0.0600 |
K55X60X30 | 55 | 60 | 30 | 0.0710 |
K55X62X18 | 55 | 62 | 18 | 0.0520 |
K55X63X20 | 55 | 63 | 20 | 0.0670 |
K55X63X25 | 55 | 63 | 25 | 0.0800 |
K55X63X32 | 55 | 63 | 32 | 0.1020 |
K58X65X18 | 58 | 65 | 18 | 0.0520 |
K58X65X36 | 58 | 65 | 36 | 0.1270 |
K60X65X20 | 60 | 65 | 20 | 0.0520 |
K60X65X30 | 60 | 65 | 30 | 0.0770 |
K60X66X33 | 60 | 66 | 33 | 0.1040 |
K60X66X40 | 60 | 66 | 40 | 0.1160 |
K60X68X20 | 60 | 68 | 20 | 0.0710 |
K60X68X23 | 60 | 68 | 23 | 0.0940 |
K60X68X25 | 60 | 68 | 25 | 0.0890 |
K60X68X30 | 60 | 68 | 30 | 0.1290 |
K60X75X42 | 60 | 75 | 42 | 0.2400 |
K62X70X40 | 62 | 70 | 40 | 0.1740 |
K64X70X16 | 64 | 70 | 16 | 0.0530 |
K65X70X20 | 65 | 70 | 20 | 0.0560 |
K65X70X30 | 65 | 70 | 30 | 0.0830 |
K65X73X23 | 65 | 73 | 23 | 0.1080 |
K65X73X30 | 65 | 73 | 30 | 0.1410 |
K68X74X20 | 68 | 74 | 20 | 0.0710 |
K68X74X30 | 68 | 74 | 30 | 0.1000 |
K68X74X35 | 68 | 74 | 35 | 0.1200 |
K70X76X20 | 70 | 76 | 20 | 0.0710 |
K70X76X30 | 70 | 76 | 30 | 0.1100 |
K70X78X30 | 70 | 78 | 30 | 0.1480 |
K72X80X20 | 72 | 80 | 20 | 0.0980 |
K73X79X20 | 73 | 79 | 20 | 0.0750 |
K75X81X20 | 75 | 81 | 20 | 0.0790 |
K75X81X30 | 75 | 81 | 30 | 0.1140 |
K75X83X23 | 75 | 83 | 23 | 0.1240 |
K75X83X30 | 75 | 83 | 30 | 0.1470 |
K75X83X35 | 75 | 83 | 35 | 0.1820 |
K75X83X40 | 75 | 83 | 40 | 0.2110 |
K80X86X20 | 80 | 86 | 20 | 0.0600 |
K80X88X30 | 80 | 88 | 30 | 0.1380 |
K80X88X40 | 80 | 88 | 40 | 0.2270 |
K80X88X46 | 80 | 88 | 46 | 0.2600 |
K85X92X20 | 85 | 92 | 20 | 0.1020 |
K90X97X20 | 90 | 97 | 20 | 0.1090 |
K90X98X27 | 90 | 98 | 27 | 0.1500 |
K90X98X30 | 90 | 98 | 30 | 0.1720 |
K95X103X30 | 95 | 103 | 30 | 0.1650 |
K95X103X40 | 95 | 103 | 40 | 0.2660 |
K100X107X21 | 100 | 107 | 21 | 0.1200 |
K100X108X27 | 100 | 108 | 27 | 0.1850 |
K100X108X30 | 100 | 108 | 30 | 0.1800 |
K105X112X21 | 105 | 112 | 21 | 0.1290 |
K110X117X24 | 110 | 117 | 24 | 0.1720 |
K110X118X30 | 110 | 118 | 30 | 0.2170 |
K115X123X27 | 115 | 123 | 27 | 0.2000 |
K120X127X24 | 120 | 127 | 24 | 0.1650 |
K125X133X35 | 125 | 133 | 35 | 0.2750 |
K130X137X24 | 130 | 137 | 24 | 0.1700 |
K135X143X35 | 135 | 143 | 35 | 0.3000 |
K145X153X26 | 145 | 153 | 26 | 0.2620 |
K150X160X46 | 150 | 160 | 46 | 0.5700 |
K155X163X26 | 155 | 163 | 26 | 0.2650 |
K160X170X46 | 160 | 170 | 46 | 0.5500 |
K165X173X26 | 165 | 173 | 26 | 0.3200 |
K175X183X32 | 175 | 183 | 32 | 0.4000 |
K185X195X37 | 185 | 195 | 37 | 0.6070 |
K195X205X37 | 195 | 205 | 37 | 0.6200 |
K210X220X42 | 210 | 220 | 42 | 0.7400 |
K220X230X42 | 220 | 230 | 42 | 0.7900 |
K240X250X42 | 240 | 250 | 42 | 0.8500 |
K265X280X50 | 265 | 280 | 50 | 1.8100 |