NINGBO RUNNING BEARINGS CO.,LTD

Automobile bearings DB 69899E

Demension: 47.063×53.12×21.5 mm,    Weight: 30g.
SHAPE LOCATION TOLERANCE SHOULD BE TO CURRENT STANDARD;
Outer ring fordrawncup needle roller bearings(DC type) is made of cold rolled steel strip accurately 

formed.Structure of DC needle roller bearings features space saving and higher capacity.They are suitable 

for applications with limited space and housing not hard enough to act as raceway. No requirement on axial 

location when the DC needle roller bearing is pressed into the housing.
In most applications inner ring is not necessary for DC needle roller bearings unless shaft raceway is 

impractical,standard inner rings for DC to compare with open end DC needle roller bearings, close end DC 

needle roller bearings are good for sealing at the close end of bearings,operating temperature range for 

bearings grease lubricatedare 20℃ to +120℃.

Automobile bearings DB 69899E
1. Inspection the enveloping circle diameter

    The dimensional accuracy of drawn cup needle roller bearings cannot be measured before fitting

    without a ring gauge as the thin-walled outer ring can be out of round due to the manufacturing process.

    The bearings obtain the accuracy required for their correct function only when pressed into ahousing

     bore which must be manufactured with the recommended tolerance limits.

     The enveloping circle diameter can then be checked as follows:

a.   Press the bearing into a steel ring gauge(wall thickness≥20mm).The bore dimension of the ring

    gauge must correspond to that given.

b.   Measure the enveloping circle diameter with cylindrical go and no-go gauge plugs.

About RNB

RNB is a bearings manufactory Group, it was started in 2001 by two Overseas Bearing Professional who graduated and  came back to China to establish the RNBearings Manufactory. It has passed the ISO9001:2008 international quality management system attestation. They are engaged in creating a good reputation RNB brand both in domestic and abroad market. 

RNB has very broad range of products and their preponderant ones refer to ball bearings: Deep groove ball bearings, Thrust ball bearings, Ceramic ball bearings, UC and UCP housing and non-standard ball bearings. For the roller bearings: Cylindrical roller bearings, Slewing bearings ,Taper roller bearings, Spherical roller bearings, and so on.

They not only has our own "RNB" brand bearings, but also supply OEM the bearings parts and bushing using in the car, Mechanical equipment and so on. By thier efforts, RNBearings' clients are spread over more than 95 countries.From now on, Customer is extending in more than 96 countries, among them, Europe , the USA,South America, Asia and Middle East countries are our customers major distributions.

If you are interested in RNB, visit:

www.rnbearings.cc
Contact person: Mr. David
Telephone: 86-574-87405339
Fax: 86-574-87916965
Address: High-tech industrial zones, Ningbo, Zhejiang, China (Mainland)