Needle Roller Bearing K72X80X20
Material: Chrome Steel, Carbon Steel, Stainless Steel
Brand Name: Timken SKF NSK NTN Koyo NACHI & OEM
Quality Standard: SGS ISO9001
Supply Ability: 1,000,000 pcs/Day In stock Fast Delivery!
Payment Terms: T/T, L/C, Paypal, Western UnionPackage：
Plastic bag + single box + carton + plywood pallet
Neutral industrial packaging + neutral carton packaging + pallet
According to customer requirements
The working principle of needle roller bearings is to use rolling friction to reduce friction and resistance. When the bearing is subjected to axial or radial load, the needle roller rolls between the inner and outer rings, thereby reducing friction and resistance. The rolling friction of needle roller is much less than the sliding friction, so needle roller bearings are more suitable for high-speed and high-load applications than plain bearings.
The advantage of needle roller bearings is not only that they can withstand larger loads and speeds, but also that they have a longer life and lower maintenance costs. The life of needle roller bearings mainly depends on the material and manufacturing process of needle roller and cage, as well as the use environment and load of bearings. In general, the life of needle bearings can reach tens of thousands of hours or even longer.
New domestic models | Old domestic model | Inner diameter (mm) | Outer diameter (mm) | Width(mm) | Cr(kN) | Cor(kN) | Grease lubrication speed (r/min) | Oil lubrication speed (r/min) | Weight (kg) |
NAV4003 | 4074103 | 17 | 35 | 18 | – | – | – | – | 0.098 |
NAV4004 | 4074104 | 20 | 42 | 22 | – | – | – | – | 0.175 |
RNAV4016 | 4084116 | 100.3 | 125 | 45 | – | – | – | – | 0 |
RNAV4015 | 4084115 | 92.7 | 115 | 40 | – | – | – | – | 1.025 |
RNAV4014 | 4084114 | 88 | 110 | 40 | – | – | – | – | 0.982 |
RNAV4013 | 4084113 | 80.3 | 100 | 35 | – | – | – | – | 0.692 |
RNAV4012 | 4084112 | 74.6 | 95 | 35 | – | – | – | – | 1.025 |
RNAV4011 | 4084111 | 69.8 | 90 | 35 | – | – | – | – | 0.645 |
RNAV4010 | 4084110 | 62.1 | 80 | 30 | – | – | – | – | 0.426 |
RNAV4009 | 4084109 | 57.4 | 75 | 30 | – | – | – | – | 0.39 |
RNAV4008 | 4084108 | 51.6 | 68 | 28 | – | – | – | – | 0.304 |
RNAV4007 | 4084107 | 45.9 | 62 | 27 | – | – | – | – | 0.259 |
RNAV4006 | 4084106 | 40.1 | 55 | 25 | – | – | – | – | 0.193 |
RNAV4005 | 4084105 | 33.5 | 47 | 22 | – | – | – | – | 0.129 |
RNAV4920 | 4084920E | 115 | 140 | 40 | – | – | – | – | 0 |
RNAV4919 | 4084919E | 110 | 130 | 35 | – | – | – | – | 0 |
RNAV4918 | 4084918E | 105 | 125 | 35 | – | – | – | – | 0 |
RNAV4916 | 4084916E | 90 | 110 | 30 | – | – | – | – | 0 |
RNAV4914 | 4084914E | 80 | 100 | 30 | – | – | – | – | 0 |
RNAV4912 | 4084912E | 68 | 85 | 25 | – | – | – | – | 0 |
RNAV4910 | 4084910E | 58 | 72 | 22 | – | – | – | – | 0 |
RNAV4909 | 4084909E | 52 | 68 | 22 | – | – | – | – | 0 |
RNAV4908 | 4084908E | 48 | 62 | 22 | – | – | – | – | 0 |
RNAV4907 | 4084907E | 42 | 55 | 20 | – | – | – | – | 0 |
RNAV4906 | 4084906E | 35 | 47 | 17 | – | – | – | – | 0 |
RNAV4905 | 4084905E | 30 | 42 | 17 | – | – | – | – | 0 |
RNAV4904 | 4084904E | 25 | 37 | 17 | – | – | – | – | 0 |
RNAV4903 | 4084903E | 22 | 30 | 13 | – | – | – | – | 0 |
RNAV4902 | 4084902E | 20 | 28 | 13 | – | – | – | – | 0 |
NA6901 | 6544901 | 12 | 24 | 22 | 16.3 | 21.7 | 27000 | – | 0.045 |
NA6902 | 65449O2 | 15 | 28 | 23 | 18.4 | 27.1 | 22000 | – | 0.062 |
NA6903 | 6544903 | 17 | 30 | 23 | 18.9 | 29 | 20000 | – | 0.067 |
NA6904 | 65449O4 | 20 | 37 | 30 | 35.4 | 48.9 | 17000 | – | 0.137 |
NA6905 | 6544905 | 25 | 42 | 30 | 40.1 | 60.7 | 15000 | – | 0.162 |
NA6906 | 6544906 | 30 | 47 | 30 | 42.7 | 69 | 13000 | – | 0.186 |
NA6907 | 6254907 | 35 | 55 | 36 | 51.4 | 85.1 | 11000 | – | 0.297 |
NA6908 | 6254908 | 40 | 62 | 40 | 66.7 | 115 | 9400 | – | 0.415 |
NA6909 | 6254909 | 45 | 68 | 40 | 70.7 | 127 | 8800 | – | 0.496 |
RNA6901 | 6644901 | 12 | 24 | 22 | 16.3 | 21.7 | 27000 | – | 0.03 |
RNA6902 | 6644902 | 15 | 28 | 23 | 18.4 | 27.1 | 22000 | – | 0.038 |
RNA6903 | 6644903 | 17 | 30 | 23 | 18.9 | 29 | 20000 | – | 0.04 |
RNA6904 | 6644904 | 20 | 37 | 30 | 35.4 | 48.9 | 17000 | – | 0.096 |
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