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Backstops are used extensively on pumps used in the primary and secondary cooling systems of power generating equipment.
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Telephone:86-519-85858018
Linkman:Ellen Zhang
Mobile phone:86-18068536660
FAX:86-519 85858018
E-mail:ellen@chinasuma.com
address:DONGHUA INDUSTRY PARK, WUJIN DISTRICT, CHANGZHOU, JIANGSU PROVINCE, CHINA PR.
            
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Needle roller bearing NA RNA
  • https://www.chinasuma.com/uploadfiles/103.224.250.119/webid106/pc_water/201803/152083489270.jpg
introduction

Needle roller bearing NA RNA

Features

Needle Roller Bearings (needle bearing) is a roller with a cylindrical roller bearings, relative to its diameter, both the thin and long rollers. This is called needle roller. Despite its smaller cross-section, still has a higher load bearing capacity, therefore, especially suitable for the radial space-constrained occasions. 
Needle contour surface in the proximal surface of the slight contraction. Needle and raceway contact line results can be amended to avoid damaging the edge of the stress.
 

Needle Roller Bearing characteristics and uses: 
Equipped with a thin and long needle bearing roller (roller diameter, length 3 to 10 times the diameter of generally not more than 5mm), so the radial structure is compact, its diameter size and payload capacity compared with other types of bearings the same time, diameter minimum, especially for the radial bearing installation dimensions restricted results. According to the use of different occasions, may make use of, or needle roller bearings without inner ring and cage components, this time to match with the bearing journal surface and the surface of shell holes directly as bearing inner and outer rolling surface, in order to ensure the load capacity and operating performance and a ring bearing the same shaft or housing bore raceway surfacehardness, machining accuracy and surface quality should be similar raceway of the bearing rings. Such bearings can only bear the radial load.


Shaft Dia.

mm

Model No.

D

mm

C

mm

rs

min

Da max

Dyn. CSta. C

Rotation Speed

rpm

Weight

g

5RNA49311100.159.82420195080 0004.6
6RNA49412100.1510.82700232070 0005.3
7RNA49513100.1511.82960269060 0005.9
8RNA49615100.1513.83960342050 0007.4
9RNA49717100.1515.84530365045 0009.3
10RNA49819110.217.46180503040 00012.6
12RNA49920110.3186600631035 00013.6
14RNA490022130.32092301010030 00016.5
16RNA490124130.32296601110025 00018.1
16RNA690124220.322171002300025 00030
18RNA49/1426130.324106001280020 00019.9
20RNA490228130.326109001380020 00021.5
20RNA690228230.326193002880020 00037
22RNA490330130.328117001560018 00023.5
22RNA690330230.328208003250018 00040.5
25RNA490437170.335210002500016 00055.5
25RNA690437300.335354004890016 00095.5
28RNA49/2239170.337214002890014 00056.5
28RNA69/2239300.337363005690014 00097.5
30RNA490542170.340237003070013 00064
30RNA690542300.340421006430013 000111
32RNA 49/2845170.343245003270012 00076.5
32RNA 69/2845300.343418006480012 000133
35RNA 490647170.345252003470011 00072.5
35RNA 690647300.345430006900011 000125
40RNA 49/3252200.648312004780010 00096
40RNA 69/3252360.648535009570010 000172
42RNA 490755200.65132000501009 500113
42RNA 690755360.651549001000009 500200
45RNA 49/3858200.65433600546009 000120
48RNA490862220.65841600674008 500152
48RNA690862400.658713001350008 500275
50RNA49/4265220.66142500703008 000174
52RNA490968220.66443500733007 500197
52RNA690968400.664746001470007 500355
55RNA49/4870220.66644300763007 500188
58RNA491072220.66846200821007 000179
58RNA691072400.668792001640007 000320
60RNA49/5275220.67147100851006 500205
63RNA4911802517557600972006 500265
63RNA69118045175987001940006 500475
65RNA49/588225177589001010006 000275
68RNA49128525180602001050006 000285
68RNA691285451801030002110006 000510


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Telephone: 86-519-85858018    Mobile phone: 86-18068536660    Fax: 86-519 85858018
E-mail: ellen@chinasuma.com
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