Needle Bearing Na4900 Series Na4901 /4902 /4903 Needle Roller Bearing

Quick Details
Packaging & Delivery
Specifications
1.Needle Roller Bearing Size: 5~150mm 
2.Material: Chrome Steel GCr15.HRC58-62. 
3.High precision 
4.Large Stock
 Needle bearing NA4900 series NA4901 /4902 /4903 needle roller bearing

A needle roller bearing is a bearing which uses small cylindrical rollers.
They are used to reduce friction of a rotating surface.
Needle bearings have a large surface area that is in contact with the bearing outer surfaces compared to ball bearings. Additionally there is less added clearance (difference between the diameter of the shaft and the diameter of the bearing) so they are much more compact.
The typical structure consists of a needle cage which orients and contains the needle rollers, the needle rollers themselves, and an outer race (sometimes the housing itself).
Radial needle bearings are cylindrical and use rollers parallel to the axis of the shaft. Thrust needle bearings are flat and use a radial pattern of needles.
Full complement bearings have solid inner and outer rings and rib-guided cylindrical rollers. Since these bearings have the largest possible number of rolling elements, they have extremely high radial load carrying capacity and are suitable for particularly compact designs.
 
Needle Bearings parameters:
 


Automobile,Motorbike,Electric tools ,Small appliances ,Textile machine,Printing machine, Fitness sports equipment,Medical device,Printer,Automatictellermachine,Modelairplane etc.
 
 
 
 
 
Precision rating: ABEC1,ABEC3,ABEC5,ABEC7,ABEC9,P0,P6,P5,P4,P2
 
  

Needle roller bearing used for general engineer:
 
1.open type drawn cup needle roller bearing(1)
 
2.closed type drawn cup needle roller bearing(2)
 
3.needle roller bearing with inner ring(3)
 
4.needle roller bearing without inner ring/ needle roller bearing without inner ring and cage(4)
 
5. full needle roller bearing with cage or without cage(5)
 
Type of needle roller bearing:
 
1.radial needle and cage component
 
2.NA,NKI needle roller bearing
 
3.RNA,NK needle roller bearing without inner ring 
 
4.HK type drawn cup caged needle roller bearing 
 
5.BK type drawn cup caged needle roller bearing 
 
Metric needle roller bearing: 
 
HK,BK,F,FH,FY,MF,MFH,MFY; TA..Z,TLA..Z,TAM,TLAM,YT,YTL 
 
Inch needle roller bearing: 
 
SCE,BCE,SCH,BCH,SN,B,BH,M,MH,;BA...Z,BHA...Z,BAM,BHAM,YB,YBH 
 
1.RS--- single side sealed with metric system
 
2.2RS--- double sealed with metric system
 
3.P--- single side sealed with inch system
 
4.PP--- double sealed with inch system 
 
5.STO--no outer wall,an inner ring roller bearing
 
More introduction on the needle roller bearing
 
RNA22...2RS double sealed, no inner ring roller bearing 
 
NA22..2RS double sealed, an inner ring roller bearing 
 
NATR...PP flat ring axial guide roller bearing 
 
NATV...PP flat ring axial guide roller bearing, full needle 
 
NUTR rolling body guide roller bearing, full roller 
 
CRY inch flat ring guide roller bearing 
 
ASI/OH--oil hole;HK,BA,TA..Z--drawn cup caged needle roller bearing with open end;BK,TAM,TLAM--drawn cup caged needle roller bearing with closed end. 
 
1.F--drawn cup caged full needle roller bearing with open end
 
2.FY,YT--drawn cup caged full needle roller bearing with open end(grease limit)
 
3.FH,YTL--drawn cup caged full needle roller bearing with open end(heavy series)
 
4.MF--drawn cup caged full needle roller bearing with closed end
 
5.MFH--drawn cup caged full needle roller bearing with closed end
 
6.SCE--drawn cup caged needle roller bearing with open end
 
7.BCE--drawn cup caged needle roller bearing with closed end
 
8.SCH--drawn cup caged needle roller bearing with open end
 
9.BCH--drawn cup caged needle roller bearing with closed end
 
10.SN--drawn cup caged full needle roller bearing with open end
 
11.B--drawn cup caged full needle roller bearing with open end
 
12.BH--drawn cup caged full needle roller bearing with open end(heavy series)
 
13.M--drawn cup caged full needle roller bearing with closed end
 
14.MH--drawn cup caged full needle roller bearing with closed end(heavy series) 
 
Type of needle roller bearing: 
 
1.needle roller thrust bearing 
 
2.combined needle roller bearing 
 
 
Single way needle roller bearing 

 
Wafang Dian Bearing Advantage
 
1. Material Advantage
All the material for Wafang Dian bearing are from the best suppliers in China.
 
2. Processing Advantage
we can guarantee the time spent and quality of every processing. We can do three times tempering to stabilize 
 
the dimensions of the bearings, which is quite different from other bearings manufacturers. 
 
3. Quality control advantage
All the bearing parts are 100% strictly inspected before and during production including Metallurgical 
 
testing, crack detection, roundness, hardness, roughness and g++eometric dimensions.          
 
4. All of bearings meet the ISO international standard.
 
5. Appearance Technology Advantage
we can provide light chamfer, black chamfer, black chamfer of the rollers. The bearings are produced all 
 
according to customer's requirements.
 
6. Service Advantage
 
Your satisfaction is our biggest goal. From quotation to the final packing and transport, we provide the 
 
quickest and most satisfactory services to every customer.
 
 
We participate Canton Fair,Shanghai Auto Mechanika Fair,Professional Auto Parts Fair annually.
 
Welcome Inquiry and order !
Thank you!