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Sealed needle roller bearings with inner ring

Needle bearing (needle bearing) is a cylindrical roller bearing, relative to its diameter, the roller is both thin and long this roller called needle although has a smaller section, bearing still has a higher load bearing capacity.

Introduction

Needle bearing (needle bearing) is a cylindrical roller bearing, relative to its diameter, the roller is both thin and long this roller called needle although has a smaller section, bearing still has a higher load bearing capacity, needle bearing is equipped with thin and long roller (roller diameter D 5mm,L/D 2.5,L is the length of roller), so the radial structure is compact, and its inner diameter size and load capacity are the same as other types of bearings, while the outer diameter is the smallest, especially suitable for the radial installation size of the support structure is limited .

Metric and inch needle bearings have various structural types, mainly including open stamping needle roller bearings, closed stamping needle roller bearings, needle roller bearings with inner ring and needle roller bearings without inner ring/without inner ring Cage needle roller bearings, caged and cageless needle roller bearings. Widely used in automobiles, motorcycles, mopeds, power tools, textiles, agricultural machinery, printing machinery, construction machinery, automatic instruments and other fields.

PRODUCT SPECIFICATION

Shaft Diameter Bearing No. Boundary Dimensions Basic Load Ratings Limiting Speed
RNA 49..RS RNA 49..2RS d F D C B C Co Oil
mm single sealed double sealed mm min. N rpm
10 NA 4900 RS NA 4900.2RS 10 14 22 13 14 0.3 6800 6900 13000
12 NA 4901 RS NA 4901.2RS 12 16 24 13 14 0.3 7600 8300 12000
15 NA 4902 RS NA 4902.2RS 15 20 28 13 14 0.3 8600 10300 10000
17 NA 4903 RS NA 4903.2RS 17 22 30 13 14 0.3 8800 11000 9000
20 NA 4904 RS NA 4904.2RS 20 25 37 17 18 0.3 17300 19900 7500
25 NA 4905 RS NA 4905.2RS 25 30 42 17 18 0.3 19300 24200 6500
30 NA 4906 RS NA 4906.2RS 30 35 47 17 18 0.3 21100 28500 5500
35 NA 4907 RS NA 4907.2RS 35 42 55 20 21 0.6 26500 39500 4800
40 NA 4908 RS NA 4908.2RS 40 48 62 22 23 0.6 36000 53000 4200
45 NA 4909 RS NA 4909.2RS 45 52 68 22 23 0.6 38000 59000 3900
50 NA 4910 RS NA 4910.2RS 50 58 72 22 23 0.6 40000 64000 3500

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