KOYO Bearing 6909NR

d=45 mm, D=68 mm, B=12 mm, Mass=0.132 kg
Material: Bearing steels
In Stock:
Photo may not represent actual item. See the technical specification for details.

Specifications of KOYO Bearing 6909NR

KOYO Bearing 6909NR

Specifications
(Boundary dimensions …etc)

d
45 mm
D
68 mm
B
12 mm
r(min.)
0.6 mm
r1(min.)
0.6 mm
Basic load ratings : Cr
17.7 kN
Basic load ratings : C0r
10.9 kN
Fatigue load limit : Cu
0.600 kN
factor : f0
15.9
Limiting speeds(Grease lub.)
9700 min-1
Limiting speeds(Oil lub.)
11000 min-1
Dimensions of snap ring groove : D1(max.)
mm
Dimensions of snap ring groove : a(max.)
mm
Dimensions of snap ring groove : b(±0.05)
mm
Dimensions of snap ring groove : r0(max.)
mm
Dimensions of locating snap ring : D2(min.)
70.8 mm
Dimensions of locating snap ring : f(±0.05)
0.8 mm

Mounting dimensions

da(min.)
49 mm
Da(max.)
64 mm
Dx(min.)
72 mm
Cy(max.)
2.3 mm
ra(max.)
0.6 mm
rb(max.)
0.6 mm

Refer.

(Refer.)Mass
0.132 kg

Product description of KOYO Bearing 6909NR

Deep groove ball bearings single-row Locating snap ring, KOYO Bearing 6909NR, With its wide dimensional scope, the deep groove ball bearing is the most commonly used rolling bearing and is capable of simultaneously receiving a radial load and bidirectional axial load to a certain extent. Deep groove ball bearings are available in a variety of sizes, and are the most popular of all roiling bearings. This type of bearing supports radial load and a certain degree of axial load in both directions simultaneously.

The calculation formulas of free misalignment are deduced for single-row deep groove ball bearings and double-row angular contact ball bearings by geometry analysis,and the free misalignment are analyzed and compared for both kinds of bearings.

Deep groove ball bearings single-row Locating snap ring, KOYO Bearing 6909NR,correspond in their structure to a pair of single row deep groove ball bearings but have two raceway grooves, each with one row of balls. Due to the larger number of rolling elements, they can be subjected to higher loads than single row deep groove ball bearings.

Single row bearings are used where the load carrying capacity of single row deep groove ball bearings is not sufficient. Since the bearings can also support loads due to tilting, they are suitable for particularly short shafts that are supported by only one bearing.

The deep groove ball bearing with single-row rolling elements not only has all the characteristics of a standard deep groove ball bearing, but also provides a higher bearing capacity.

Application Fields
Motor, generator, agriculture, material transportation, industrial gearbox, food and beverage, industrial fan, vehicle, and medical apparatus and instruments
① With low friction torque, optimized by low vibration and low noise, and suitable for high-speed operation.
② Simple structure, standardized processing technology, reliable and durable, and cost-effective.
③ Being able to carry axial loads in both radial direction and axial direction, easy to install, low maintenance cost.
■With locating snap ring
●Bearings with a locating snap ring can be fit to the housing easily, as the locating snap ring facilitates axial positioning.

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