F-204754.RNU Cylindrical Roller Bearing Without Inner Ring 42.01MMX72MMX30MM
Min. Order:
2 Piece
Stock:
1000 Piece
Production Capacity:
1000
Port:
GZ, QINGDAO , SHANGHAI, PEK
Payment term:
100% deposit TT/ WESTERN UNION/ ALIPAY/
WECHAT
Delivery time:
Within 3days after payment usually
WhatsApp: +86 15063386731
Mobile NO.: +86 15063386731
Technical Parameters:
Product Designations:
F-204754.RNU
Old Designations:
F-204754.RNU
HS Code:
8482500090
Structure:
Number of Rows:
single row
Inside Diameter:
42.01 mm
Outside Diameter:
72 mm
Thickness:
30 mm
Weight:
0.47KG KG
Dynamic load Capacity, Radial (Cr):
1780KN
Static load Capacity, Radial (Cor):
1980KN
Demensions:
42.01MMX72MMX30MM
Brand:
WOMO or Brand as request
Radial Clearance Trade No.:
C0 , C3
Precision Rating:
P6 P5
Load Direction:
Radial
Bearing Material:
Chrome steel, bearing steel
Cage material:
steel , nylon
Seals Type:
open
Roller Material:
chrome steel
Transport Package:
carton boxes+ wooden cases
Shipping Ways:
air freight, sea freight , and express
Country of Origin:
Germany/ Japan/ China
Service:
WOMO/ OEM / brand as request
Quality Control:
high
Feature:
out ring with two side flange , inner ring
one side with flange , another side with spacer
Bore Type:
cylindrical
Operating Temperature Range:
MAX 180C
Outer Ring Width:
72mm
Inner Ring Width:
42.01mm
Application:
Reducer, petrochemical, textile,
metallurgy, mining, steel mills, etc. Light and heavy machinery, etc.
F-204754.RNU Cylindrical Roller Bearing
Without Inner Ring 42.01MMX72MMX30MM
F-204754.RNU cylindrical roller
bearing without inner ring 42.01MMX72MMX30MM
WOMO bearings supply group continue to
improve the high efficiency , reliability and longer life-span of machine by
providing high quality level bearings to each user .
The reducer bearing is a special bearing
which be mainly used in various reducers. There are also large-scale reducers
that use spherical roller bearings, such as 24044, 24048, etc., and cylindrical
roller bearings (RSL series , CpmSeries, F- series are used in small
reducers
the small size reducer bearing can include
below types
Single row cylindrical roller bearings
Single row cylindrical roller bearing
without outer ring
Single row cylindrical roller bearing
without inner ring
Double row cylindrical roller bearing
without outer ring
|
Model: |
F-204754.RNU |
Bearing Type: |
cylindrical roller bearing |
|
Brand: |
WOMO,
Brand as
request |
inner d: |
42.01mm |
|
Out D: |
72mm |
Thickness B |
30mm |
|
Unit Kg: |
0.47kg |
HS CODE number |
8482500090 |
|
Cage type: |
|
seal type |
OPEN |
|
Hole Type: |
Cylindrical |
Precision |
P5, P6 |
|
Materical: |
Chrome Steel |
tep level |
180 degree |
|
Related Models |
F-204754.RNU |
||
|
bearing structure |
Cylindrical roller bearing |
Pack type |
carton box +wooden box |
|
Using Area |
Wind Turbines, Planetary Gear Reducer,
hydraulic pump , petrochemical, textile, metallurgy, mining, steel mills,
etc. Light and heavy machinery, etc. |
||
|
Payment Way |
By Wire Transfer / Western Union /
ALIPAY |
||
|
delivery time |
Within 3days after payment |
||
|
Delivery way |
Sea freight , Air freight , World
Express |
||
|
Quality Level |
High Precision level |
||
|
Service |
OEM, WOMO , brand as you request |
||
|
Cover market |
BRAZIL , CHILE ,PERU , MEXICO,SPAN,
SOUTH AFRICA, TURKEY |
||
|
Contact |
Email: abby@womobearing.com
Skype: LuckyAbby7
Wechat/whatsapp: 86 15063386731 |
||
FEATURES:
- Fit to high radial loads;
- Multi-row , single row , full complement
rollers without cage , Axial Washer can be available too
- Special specifications and
customized designs available;
- For both gearboxes and generators,
hydraulic pump
For further information, please just feel
free to contact with us on-Line.
How can you buy F-204754.RNU Cylindrical
Roller Bearing Without Inner Ring 42.01MMX72MMX30MM on the Internet?
High quality F-204754.RNU ( 0.47KG kg Mass, ID: 42.01 mm OD: 72 mm WD: 30 mm ,
single row Rows , C0 , C3 Radial Clearance , P6 P5 Accuracy Class , Chrome
steel, bearing steel Material , 1780KN Radial dynamic , 1980KN Radial static ),
Just click the button " Contact Now" to mention your
purchase Requirement , Quantity and Contact Method of your requested Bearing
Item No. F-204754.RNU. then click the button " Send " The web site
will make your purchasing information sent to the supplier's mailbox, who will
come to contact you upon they get your information at the first time.
Where the noise comes from
Noise in a rotating bearing is the audible component of vibration and a function of rotational speed. The greater the vibration, the shorter the bearing’s lifespan — plus, excessive vibration is capable of damaging the motor or machinery.
Vibration is caused by several factors, including, rough or damaged raceway and ball surfaces, poor geometric tolerances (roundness, concentricity, runout, and/or parallelism), contamination, improper lubrication, incorrect radial play, and improper shaft and housing fits.
How we reduce the noise
An EMQ bearing is manufactured by superfinishing the rolling contact surfaces to a mirror-like finish, which provides for very smooth rotation. Equally important is maintaining tight control of the geometric tolerances of the bearing components.
Particle contamination in a bearing adds to the noise level – engineers can prevent this, however, by using seals to prevent ingress of contaminants and taking care to use only “clean” lubricants that have been filtered to remove large solid particles. Specifying the proper radial clearance is also vital: it should be as close to zero as possible, without causing the bearing to bind up during rotation. If the radial clearance is too loose, it results in excessive noise-causing vibration.
As with any type of bearing, the lifespan of EMQ bearings also depends on external factors. Great care should be taken during handling and mounting because impact forces from dropping a bearing or hitting it during installation can create small dents in the raceways, called brinelling. Brinelling creates excessive vibration during rotation, eventually leading to bearing failure.
Shaft and housing roundness can also contribute to noise, especially in smaller and thin-section bearings. Poor roundness can distort the bearing rings upon installation, which prevents smooth rotation and leads to the generation of noise.
Manufacturers of EMQ bearings typically perform 100% noise inspection on the bearings using a special piece of equipment called the Anderon meter (or a similar instrument). This device measures the vibration velocity (displacement x frequency) of a rotating bearing in Anderon units (equivalent to 7.5 microns per second) across three frequency bands: low, medium, and high. The higher the vibration velocity, the noisier the bearing.
Lastly, it’s important to stress the fact that EMQ standards are not uniform between bearing manufacturers – except those located in China, where there is a national standard. Despite this lack of uniformity, however, you may rest assured that an EMQ rating from a manufacturer (based on sufficient empirical evidence) indicates the bearing is suitable for use in electric motors.
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