Needle roller bearings are essentially cylindrical roller bearings except that their cylindrical rollers have a length 3 to 10 times their diameter (versus a length less than 3 times their diameter). Needle bearings are also essentially bearings that utilize small & cylindric rollers. Therefore, the ratio of the bearing outside diameter to the inscribed circle diameter is small, and they have a rather high radial load capacity.
Needle roller bearings NK series that have metric dimensions, precision ground raceways with ribs, without Inner Rings, cage guided rollers, with/without Seals. And it has no inner ring, therefore they’re lighter than needle roller bearings of the series NKI. They can be mounted directly on the shaft. They support relatively high radial loads and allow higher speeds.
Needle roller bearings without an inner ring are an excellent choice for compact bearing arrangements if the shaft can be hardened and ground. Eliminating the need for a separate inner ring enables a larger shaft diameter and a stiffer arrangement. Axial displacement of the shaft relative to the housing is only limited by the width of the raceway on the shaft. By machining the shaft raceways to the appropriate dimensional and form accuracy, it is possible to obtain bearing arrangements with heightened running accuracy.
Application
Needle roller bearings are ideal for many of the following applications: transmissions, transfer cases, engines, valve trains, steering and braking systems, axle supports, outboard engines, textile industry, power tools, copiers, fax machines, paper-moving equipment, and appliances.
Bearing Model | Shaft Diameter (mm) | Dimensions(mm) | Basic Load Rating(N) | Limiting Speed(rpm) | Weight(Kg) | |||
Fw | D | C | Dyn.C | Stat.Co | Oil | |||
NK5/10 | 5 | 5 | 10 | 10 | 2100 | 1400 | 36780 | 0.0033 |
NK5/8 | 5 | 5 | 10 | 8 | 2101 | 1401 | 36781 | 0.0033 |
NK5/12 | 5 | 5 | 10 | 12 | 3000 | 2650 | 39000 | 0.00357 |
NK6/10 | 6 | 6 | 12 | 10 | 2600 | 2200 | 37000 | 0.005 |
NK6/12 | 6 | 6 | 12 | 12 | 3350 | 3150 | 37000 | 0.006 |
NK7/10 | 7 | 7 | 14 | 10 | 2850 | 2650 | 34000 | 0.0069 |
NK7/12 | 7 | 7 | 14 | 12 | 3650 | 3600 | 34000 | 0.008 |
NK8/12 | 8 | 8 | 15 | 12 | 3950 | 4100 | 32000 | 0.0087 |
NK8/16 | 8 | 8 | 15 | 16 | 5100 | 5800 | 32000 | 0.012 |
NK9/12 | 9 | 9 | 16 | 12 | 5101 | 5801 | 32001 | 0.01 |
NK10/10 | 10 | 10 | 17 | 10 | 4751 | 5301 | 29001 | 0.01 |
NK10/12 | 10 | 10 | 17 | 12 | 4752 | 5302 | 29002 | 0.010 |
NK10/16 | 10 | 10 | 17 | 16 | 6200 | 7800 | 29000 | 0.013 |
NK12/12 | 12 | 12 | 19 | 12 | 6000 | 6400 | 27000 | 0.012 |
NK12/16 | 12 | 12 | 19 | 16 | 8200 | 9800 | 27000 | 0.016 |
NK14/16 | 14 | 14 | 22 | 16 | 10100 | 11500 | 25000 | 0.021 |
NK14/12 | 14 | 14 | 22 | 12 | 1401 | 13801 | 24001 | 0.025 |
NK14/20 | 14 | 14 | 22 | 20 | 12800 | 15600 | 25000 | 0.027 |
NK15/12 | 15 | 15 | 23 | 12 | 8600 | 11000 | 21000 | 0.025 |
NK15/16 | 15 | 15 | 23 | 16 | 10700 | 12700 | 24000 | 0.022 |
NK15/20 | 15 | 15 | 23 | 20 | 13600 | 17200 | 24000 | 0.027 |
NK16/16 | 16 | 16 | 24 | 16 | 11300 | 13900 | 23000 | 0.024 |
NK16/20 | 16 | 16 | 24 | 20 | 10400 | 16800 | 23000 | 0.029 |
NK17/16 | 17 | 17 | 25 | 16 | 9000 | 13500 | 14000 | 0.024 |
NK17/20 | 17 | 17 | 25 | 20 | 15000 | 20000 | 23000 | 0.031 |
NK18/20 | 18 | 18 | 26 | 20 | 15500 | 19800 | 22000 | 0.032 |
NK18/16 | 18 | 18 | 26 | 16 | 12500 | 16200 | 22000 | 0.026 |
NK19/16 | 19 | 19 | 27 | 16 | 13000 | 17000 | 22000 | 0.028 |
NK20/16 | 20 | 20 | 28 | 16 | 10500 | 13800 | 21000 | 0.03 |
NK20/20 | 20 | 20 | 28 | 20 | 11500 | 21800 | 21000 | 0.034 |
NK21/12 | 21 | 21 | 29 | 12 | 13001 | 25001 | 12001 | 0.033 |
NK21/16 | 21 | 21 | 29 | 16 | 13500 | 18700 | 21000 | 0.029 |
NK21/20 | 21 | 21 | 29 | 20 | 13501 | 18701 | 21001 | 0.037 |
NK22/16 | 22 | 22 | 30 | 16 | 13500 | 18000 | 11500 | 0.03 |
NK22/20 | 22 | 22 | 30 | 20 | 12897 | 20397 | 14997 | 0.045 |
NK24/16 | 24 | 24 | 32 | 16 | 12898 | 20398 | 14998 | 0.032 |
NK25/16 | 25 | 25 | 33 | 16 | 12900 | 20400 | 15000 | 0.033 |
NK25/20 | 25 | 25 | 33 | 20 | 16800 | 28500 | 15000 | 0.043 |
NK25/30 | 25 | 25 | 33 | 30 | 18800 | 30500 | 165000 | 0.062 |
NK26/16 | 26 | 26 | 34 | 16 | 15000 | 23000 | 16300 | 0.034 |
NK26/20 | 26 | 26 | 34 | 20 | 17000 | 30000 | 16300 | 0.042 |
NK28/20 | 27 | 28 | 37 | 20 | 22000 | 34000 | 16500 | 0.053 |
NK28/30 | 27 | 28 | 37 | 30 | 33000 | 57000 | 12000 | 0.082 |
NK29/20 | 29 | 29 | 38 | 20 | 21900 | 34000 | 15000 | 0.054 |
NK29/30 | 29 | 29 | 38 | 30 | 32500 | 57000 | 15000 | 0.081 |
NK30/20 | 30 | 30 | 40 | 20 | 20600 | 32000 | 15000 | 0.065 |
NK30/30 | 30 | 30 | 40 | 30 | 31500 | 50000 | 15000 | 0.098 |
NK32/20 | 32 | 32 | 42 | 20 | 22600 | 33500 | 15000 | 0.068 |
NK32/30 | 32 | 32 | 42 | 30 | 33500 | 60000 | 12000 | 0.103 |
NK35/20 | 35 | 35 | 45 | 20 | 13800 | 26900 | 12000 | 0.074 |
NK37/20 | 37 | 37 | 47 | 20 | 24900 | 43500 | 12000 | 0.077 |
NK37/30 | 37 | 37 | 47 | 30 | 37000 | 73000 | 12000 | 0.113 |
NK38/20 | 38 | 38 | 48 | 20 | 25500 | 45000 | 12000 | 0.079 |
NK38/30 | 38 | 38 | 48 | 30 | 38000 | 76000 | 12000 | 0.116 |
NK40/20 | 40 | 40 | 50 | 20 | 26500 | 43000 | 11000 | 0.082 |
NK40/30 | 40 | 40 | 50 | 30 | 37500 | 79000 | 11000 | 0.125 |
NK42/20 | 42 | 42 | 52 | 20 | 23900 | 45000 | 10000 | 0.086 |
NK42/30 | 42 | 42 | 52 | 30 | 27000 | 49000 | 10000 | 0.13 |
NK43/20 | 43 | 43 | 53 | 20 | 25700 | 75000 | 10000 | 0.086 |
NK43/30 | 43 | 43 | 53 | 30 | 39000 | 75000 | 10000 | 0.133 |
NK45/20 | 45 | 45 | 55 | 20 | 19800 | 46500 | 7650 | 0.095 |
NK45/30 | 45 | 45 | 55 | 30 | 41000 | 88000 | 7650 | 0.14 |
NK47/20 | 47 | 47 | 57 | 20 | 28500 | 56000 | 7650 | 0.095 |
NK47/30 | 47 | 47 | 57 | 30 | 43000 | 94000 | 7650 | 0.145 |
NK50/14 | 47 | 50 | 64 | 14 | 32000 | 70100 | 8140 | 0.167 |
NK50/15 | 47 | 50 | 65 | 15 | 40000 | 62000 | 8140 | 0.178 |
NK50/27 | 47 | 50 | 67 | 27 | 40001 | 62001 | 8141 | 0.21 |
NK55/25 | 55 | 55 | 68 | 25 | 30600 | 60800 | 7600 | 0.18 |
NK55/30 | 55 | 55 | 68 | 30 | 48000 | 63000 | 7600 | 0.186 |
NK55/35 | 55 | 55 | 68 | 35 | 55000 | 74000 | 7600 | 0.25 |
NK60/25 | 60 | 60 | 72 | 25 | 39000 | 86000 | 7000 | 0.186 |
NK60/35 | 60 | 60 | 72 | 35 | 56000 | 130000 | 7000 | 0.258 |
NK65/25 | 65 | 65 | 78 | 25 | 44000 | 98000 | 7000 | 0.217 |
NK65/35 | 65 | 65 | 78 | 35 | 59000 | 142000 | 7000 | 0.053 |
NK68/25 | 65 | 68 | 82 | 25 | 43500 | 89000 | 7000 | 0.241 |
NK70/25 | 70 | 70 | 85 | 25 | 44500 | 92000 | 6500 | 0.302 |
NK70/35 | 70 | 70 | 85 | 35 | 63000 | 144000 | 6500 | 0.37 |
NK75/25 | 75 | 75 | 92 | 25 | 54000 | 104000 | 6000 | 0.315 |
NK75/35 | 75 | 75 | 92 | 35 | 77000 | 162000 | 6000 | 0.445 |
NK80/25 | 75 | 80 | 95 | 25 | 68998 | 122998 | 5498 | 0.3 |
NK80/35 | 75 | 80 | 95 | 35 | 68999 | 122999 | 5499 | 0.35 |
NK85/25 | 75 | 85 | 105 | 25 | 69000 | 123000 | 5500 | 0.425 |
NK85/35 | 75 | 85 | 105 | 35 | 98000 | 193000 | 5500 | 0.6 |
NK90/35 | 75 | 90 | 110 | 30 | 103000 | 20800 | 5000 | 0.63 |
NK95/26 | 95 | 95 | 115 | 26 | 73000 | 137000 | 4800 | 0.49 |
NK95/36 | 95 | 95 | 115 | 36 | 107000 | 223000 | 4800 | 0.68 |
NK100/30 | 95 | 100 | 120 | 30 | 107001 | 223001 | 4801 | 0.69 |
NK100/36 | 95 | 100 | 120 | 36 | 111000 | 237000 | 4600 | 0.715 |
NK105/26 | 95 | 105 | 125 | 26 | 78000 | 155000 | 4000 | 0.538 |
NK105/36 | 95 | 105 | 125 | 36 | 114000 | 250000 | 4000 | 0.71 |
NK110/30 | 95 | 110 | 130 | 30 | 98000 | 21000 | 4200 | 0.647 |
NK110/40 | 95 | 110 | 130 | 40 | 127000 | 29000 | 4200 | 0.83 |
NK115/12 | 95 | 115 | 140 | 12 | 156000 | 37000 | 4200 | 0.85 |
NK115/15 | 95 | 115 | 140 | 15 | 185000 | 45000 | 4200 | 0.88 |
NK120/40 | 120 | 120 | 140 | 40 | 214000 | 53000 | 4200 | 0.91 |
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NK Style Standard Needle Roller Bearing without Inner Ring NK6/12 Size 6x12x12 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK7/10 Size 7x14x10 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK65/35 Size 65x78x35 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK17/20 Size 17x25x20 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK18/16 Size 18x26x16 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK18/20 Size 18x26x20 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK19/16 Size 19x27x16 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK19/20 Size 19x27x20 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK20/16 Size 20x28x16 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK20/20 Size 20x28x20 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK21/16 Size 21x29x16 mmInquire
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Needle Roller Bearing Without Inner Ring NK21/20 Size 21x29x20 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK22/16 Size 22x30x16 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK22/20 Size 22x30x20 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK24/16 Size 24x32x16 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK24/20 Size 24x32x20 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK25/16 Size 25x33x16 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK25/20 Size 25x33x20 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK26/16 Size 26x34x16 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK26/20 Size 26x34x20 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK28/20 Size 28x37x20 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK28/30 Size 28x37x30 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK29/20 Size 29x38x20 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK29/30 Size 29x38x30 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK30/20 Size 30x40x20 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK30/30 Size 30x40x30 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK32/20 Size 32x42x20 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK35/20 Size 35x45x20 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK32/30 Size 32x42x30 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK35/30 Size 35x45x30 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK37/20 Size 37x47x20 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK37/30 Size 37x47x30 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK38/20 Size 38x48x20 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK38/30 Size 38x48x30 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK40/20 Size 40x50x20 mmInquire
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NK Style Standard Needle Roller Bearing without Inner Ring NK40/30 Size 40x50x30 mmInquire
