Products Description
Needle bearings, also known as roller bearings with cylindrical rollers that are slender and elongated like needles, are indispensable in various mechanical systems. This article provides a comprehensive introduction to needle bearings, including brand introductions, product types, detailed product overviews, characteristics, structures, working principles, classifications, popular brands, applications, and maintenance tips.
Brand Introduction
Leading manufacturers of needle bearings include INA, SKF, Timken, NTN, and NSK. These brands offer a wide range of needle bearings tailored to meet the diverse needs of industrial applications.
Product Types and Overview
Needle bearings are primarily classified into two types: full complement needle bearings and needle bearings with cages. Full complement needle bearings are characterized by their high load-carrying capacity and compact structure, while needle bearings with cages provide better lubrication and heat dissipation.
Product Characteristics
Needle bearings are known for their radial structure compactness and high load-carrying capacity, making them ideal for applications with limited installation space. Their rollers, which are slender and elongated, enable them to withstand high loads with minimal friction.
Product Structure
Needle bearings consist of an inner ring, an outer ring, and a series of slender cylindrical rollers arranged between the two rings. In some cases, a cage or separator is used to maintain the spacing between the rollers, preventing them from contacting each other.
Working Principle
The working principle of needle bearings involves the rolling of the slender cylindrical rollers along the raceways of the inner and outer rings. This rolling action distributes the load evenly across the contact area, minimizing friction and wear.
Types and Classifications
Needle bearings can be classified based on their structure, such as open-end, closed-end, and with or without cages. They can also be categorized based on their application, such as radial needle bearings and thrust needle bearings.
Common Brands and Applications
Popular brands like INA and SKF offer a wide range of needle bearings for use in various applications, including automotive, textile machinery, and precision machinery.
Use and Maintenance
Proper installation and regular lubrication are crucial for the longevity of needle bearings. Ensure that the bearings are installed with the correct preload and alignment to prevent premature wear and failure. Regular maintenance, including lubrication and inspection, can extend the service life of these bearings.
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Technical Parameters
| Bearing Number | Dimensions （mm） |
| RNA4822A | 120×140×30 |
| RNA49/8A | 10×19×11 |
| RNA49/9A | 12×20×11 |
| RNA4900A | 14×22×13 |
| RNA4901A | 16×24×13 |
| RNA4902A | 20×28×13 |
| RNA4902AF | 20×28×13 |
| RNA4903A | 22×30×13 |
| RNA4904A | 25×37×17 |
| RNA4905A | 30×42×17 |
| RNA4906A | 35×47×17 |
| RNA4907A | 42×55×20 |
| RNA4907A/AS4 | 42×55×20 |
| RNA4907AF1 | 42×55×20 |
| RNA4908A | 48×62×22 |
| RNA4909A | 52×68×22 |
| RNA4909AF1 | 52×68×22 |
| RNA4910A | 58×72×22 |
| RNA4910A/YB2 | 58×72×22 |
| RNA4911A | 63×80×25 |
| RNA4912A | 68×85×25 |
| RNA4913A | 72×90×25 |
| RNA4914A | 80×100×30 |
| RNA4915A | 85×105×30 |
| RNA4916A | 90×110×30 |
| RNA4917A | 100×120×35 |
| RNA4918A | 105×125×35 |
| RNA4919A | 110×130×35 |
| RNA4920A | 115×140×40 |
| RNA4922A | 125×150×40 |
| RNA4924A | 135×165×45 |
| RNA59/7A | 10×17×15 |
| RNA59/8A | 12×19×15 |
| RNA5900A | 14×22×16 |
| RNA6901A | 16×24×22 |
| RNA6901 | 16×24×22 |
| RNA6902 | 20×28×23 |
| RNA6903 | 22×30×23 |
| RNA6904 | 25×37×30 |
| RNA69/22 | 28×39×30 |
| RNA6905 | 30×42×30 |
| RNA69/28 | 32×45×30 |
| RNA6906 | 35×47×30 |
| RNA6901AF1 | 16×24×22 |
| RNA6902A | 20×28×23 |
| RNA6903A | 22×30×23 |
| RNA6904A | 25×37×30 |
| RNA6905A | 30×42×30 |
| RNA6905ATN1 | 30×42×30 |
| RNA6905AF1A | 30×42×30 |
| RNA6906A | 35×47×30 |
| RNA49/7X2A | 10×17×12 |
| RNA4905X2A | 30×42×20 |
| RNA49/38X3A | 45×55×22 |
| RNA4908X2A | 45×62×24 |
| RNA4908X3A | |
| RNA4952X3A | 55×68×25 |
| RNA59/7X2A | 10×17×15 |
| RNA59/8X2A | 12×19×15 |
| RNA5902X3A | 19×27×16 |
| RNA5904X3A | 25×35×25 |
| RNA5908X3A | 50×65×34 |
| RNA59/38X3A | 50×65×35 |
| RNA6903X2A/AS1 | 45×55×32 |
| RNA5001X3A | 16×27×25 |
| RNA5001X2A | 20×28×20 |
| RNA5002X2A | 18×32×25 |
| RNA5003X2A | 22×35×25 |
| RNA5006X3A | 45×55×32 |
| RNA5007X1A | 50×64×36 |
| RNA6001X2A | 20×28×25 |
| RNA6001X2L1A | 20×28×25 |
| RNA6002X1A | 18×33×30 |
| RNA6002X1ATN1 | 18×33×30 |
| RNA6/37A | 37×52×22 |
| NK16/16A | 16×24×16 |
| NK16/20A | 16×24×20 |
| NK16/20AF1 | 16×24×20 |
| NK14/16A | 14×22×16 |
| NK20/20A | 20×28×20 |
| NK20/25A | 20×28×25 |
| NK22/20A | 22×30×20 |
| NK25/16A | 25×33×16 |
| NK25/20A/ASI | 25×33×20 |
| NK32/20A | 32×42×20 |
| NK55/25A | 55×68×25 |
| RNA2913/YA4 | 75×90×16 |
| RNA4822 | 120×140×30 |
| RNA4824 | 130×150×30 |
| RNA4826 | 140×165×35 |
| RNA4838M/YA5 | 210×240×50 |
| RNA49/8 | 10×19×11 |
| RNA4900 | 14×22×13 |
| RNA4901 | 16×24×13 |
| RNA4902 | 20×28×13 |
| RNA4903 | 22×30×13 |
| RNA4904 | 25×37×17 |
| RNA49/22 | 28×39×17 |
| RNA4905 | 30×42×17 |
| RNA49/28 | 32×45×17 |
| RNA4906 | 35×47×17 |
| RNA49/32 | 40×52×20 |
| RNA4907 | 42×55×20 |
| RNA4908 | 48×62×22 |
| RNA4909 | 52×68×22 |
| RNA4910 | 58×72×22 |
| RNA4911 | 63×80×25 |
| RNA4912 | 68×85×25 |
| RNA4913 | 72×90×25 |
| RNA4914 | 80×100×30 |
| RNA4915 | 85×105×30 |
| RNA4916 | 90×110×30 |
| RNA4917 | 100×120×35 |
| RNA4918 | 105×125×35 |
| RNA4919 | 110×130×35 |
| RNA4920 | 115×140×40 |
| RNA4922 | 125×150×40 |
| RNA4924 | 135×165×45 |
| RNA4926 | 150×180×50 |
| RNA4928 | 160×190×50 |
| RNA4002 | 20×32×17 |
| RNA4004 | 26×42×22 |
| RNA4004/S0 | 26×42×22 |
| RNA4005 | 34×47×22 |
| RNA4006 | 40×55×25 |
| RNA4007/YA4 | 45×62×27 |
| RNA4007 | 46×62×27 |
| RNA4008 | 52×68×28 |
| RNA4009 | 57×55×30 |
| RNA4010 | 62×80×30 |
| RNA4011 | 70×90×35 |
| RNA48/9X2 | 17×25×16 |
| RNA4805X3 | 32×38×11 |
| RNA4811X2 | 60×72×16 |
| RNA6804X3 | 25×32×28 |
| RNA6807X3 | 38×48×25 |
| RNA49/8X2 | 12×19×12 |
| RNA49/8X3 | 10×17×12 |
| RNA49/8X3TN | 10×17×12 |
| RNA49/9X3 | 12×19×12 |
| RNA4907X2 | 40×55×22 |
| RNA49/42X3 | 50×65×25 |
| RNA4909X3 | 50×65×25 |
| RNA49/52X3 | 60×72×25 |
| RNA6901X3 | 16×22×20 |
| RNA69/22X3 | 28×40×32 |
| RNA6906X1 | 35×57×30 |
| RNA6910X3 | 56×70×50 |
| RNA6910X3-1 | 56×70×45 |
| RNA3002X2 | 20×32×12 |
| RNA50/28X1 | 35×51×32 |
| RNA5007 | 40.7×62×36 |
| RNA5007X3 | 42×65×32 |
| RNA5008X3 | 48.3×72×40 |
| RNA6/15 | 15×25×12 |
| RNA6/17 | 17×30×12 |
| RNA6/18 | 18×26×20 |
| RNA6/19.2 | 19.2×30×23 |
| RNA6/24 | 24×42.86×25.6 |
| RNA6/26P5 | 26×60×34 |
| RNA6/28 | 28×45×19 |
| RNA6/28X1-3 | 27.1×42×22 |
| RNA6/32 | 32×50×35 |
| RNA6/34ASI | 34×50×35 |
| RNA6/34.4 | 34.4×52×32 |
| RNA6/445 | 44.5×58.7×19 |
| RNA6/76.2 | 76.2×95.25×44.45 |
| NK6/12TN | 6×12×12 |
| NK8/12P6S1 | 8×15×12 |
| NK8/12TN | 8×15×12 |
| NK8/16TN | 8×15×16 |
| NK9/12 | 9×16×12 |
| NK14/16 | 14×22×16 |
| NK14/20 | 14×22×20 |
| NK15/12 | 15×25×12 |
| NK15/16 | 15×23×16 |
| NK15/20 | 15×23×20 |
| NK16/16 | 16×24×16 |
| NK16/20 | 16×24×20 |
| NK16/22 | 16×24×22 |
| NK17/16 | 17×25×16 |
| NK18/20 | 18×26×20 |
| NK19/16 | 19×27×16 |
| NK19/20 | 19×27×20 |
| NK20/12 | 20×33×12 |
| NK20/16 | 20×28×16 |
| NK20/20 | 20×28×20 |
| NK21/20 | 21×29×20 |
| NK22/16 | 22×30×16 |
| NK22/20 | 22×30×20 |
| NK22/20TN | 22×30×20 |
| NK24/16 | 24×32×16 |
| NK24/20 | 24×32×20 |
| NK25/16 | 25×33×16 |
| NK25/20 | 25×33×20 |
| NK25/30 | 25×33×30 |
| NK26/16 | 26×34×16 |
| NK26/20 | 26×34×20 |
| NK28/20 | 28×37×20 |
| NK28/30 | 28×37×20 |
| NK29/20 | 29×38×20 |
| NK29/30 | 29×38×30 |
| NK30/20 | 30×40×20 |
| NK30/30 | 30×40×30 |
| NK32/20 | 32×42×20 |
| NK32/30 | 32×42×30 |
| NK35/20 | 35×45×20 |
| NK35/30 | 35×45×30 |
| NK37/20 | 37×47×20 |
| NK37/30 | 37×47×30 |
| NK38/20 | 38×48×20 |
| NK38/30 | 38×48×30 |
| NK40/20 | 40×50×20 |
| NK40/30 | 40×50×30 |
| NK42/20 | 42×52×20 |
| NK42/30 | 42×52×30 |
| NK43/20 | 43×53×20 |
| NK43/30 | 43×53×30 |
| NK45/20 | 45×55×20 |
| NK45/30 | 45×55×30 |
| NK45/40 | 45×65×40 |
| NK45/54 | 45×60×54 |
| NK47/20 | 47×57×20 |
| NK47/30 | 47×57×30 |
| NK50/25 | 50×62×25 |
| NK50/27/YA | 50×67×27 |
| NK50/35 | 50×62×35 |
| NK55/25 | 55×68×25 |
| NK55/35 | 55×68×35 |
| NK60/25 | 60×72×25 |
| NK60/35 | 60×72×35 |
| NK65/25 | 65×78×25 |
| NK65/35 | 65×78×35 |
| NK65/35/ASI | 65×78×35 |
| NK68/25 | 68×82×25 |
| NK68/35 | 68×82×35 |
| NK70/25 | 70×85×25 |
| NK70/25/YA | 70×85×25 |
| NK70/35 | 70×85×35 |
| NK73/25 | 73×90×25 |
| NK73/35 | 73×90×35 |
| NK75/25 | 75×92×25 |
| NK75/35 | 75×92×35 |
| NK80/25 | 80×95×25 |
| NK80/35 | 80×95×35 |
| NK80/60 | 80×170×60 |
| NK85/25 | 85×105×25 |
| NK85/35 | 85×105×35 |
| NK90/25 | 90×110×25 |
| NK90/35 | 90×110×35 |
| NK95/26 | 95×115×26 |
| NK95/36 | 95×115×36 |
| NK100/26 | 110×120×26 |
| NK100/36 | 110×120×36 |
| NK105/26 | 105×125×26 |
| NK105/36 | 105×125×36 |
| NK110/30 | 110×130×30 |
| NK110/40 | 110×130×40 |
| RNAP4005X3 | 30×46×23 |
| RNAP6/26 | 26×60×34 |
| RNAP6/32 | 35×60×34 |
| RNA4912B | 70×85×20 |
| RNA4004B | 27.1×42×22 |
| RNA50/28B | 34.4×52×32 |
| RNA5007B | 40.7×62×36 |
| RNA5900X3B | 14×21×17 |
| RNA5006X3B | 38×56×38 |
| RNA6801X2B | 15×21×17 |
| RNA6902X1B | 19.2×30×23 |
| RNA69/42X1B | 48.3×72×40 |
| RNA6/175X3Q1 | 175×245×160 |
