Needle roller bearing NA4900 series NA4901 /4902 /4903
Quick Details
Type: Needle
Bore Size: 0 - 10 mm
Outside Diameter: 0 - 22 mm
Model Number: NA4900
Precision Rating: P1 P2 P3 P4 P5 P6
Seals Type: OPEN/ZZ/2RS
Number of Row: Single Row
Place of Origin: Shandong, China (Mainland)
height: 13mm
certificate: ISO 9001:2000
sample: available
Material: Chrome Steel GCR15
Lubrication: Free-running Grease
Cage: Steel Cage.copper Cage.nylon Cage
Feature: Long life time
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.
Brand
SEMRI needle bearings (OEM available)
Name
Needle bearing NA4900 series NA4901 /4902 /4903 needle roller bearing
Model
NA Series
SCE Series
Material
Gcr15
Certificate
ISO9001:2001
Precision
P0, P6, P5, P4
Bore Size:
3mm-200mm
Outside diameter
6mm-300mm
Clearance
C0,C1,C2,C3,C4,C5 etc.
Cage Type
Brass cage or Stainless cage
Seals Type
ZZ,RS, 2RS, R2, Z, 2Z, 2RZ etc
Features
High load-carrying capacity
Suitable for high speeds
Particularly easy to install
Application
Gear pumps
Sheaves
Automotive transmissions
Two-cycle engines
Package
pallet, wooden case,industrial package or as customers' requirement
Delivery terms
EXW,FOB, CFR, CIF
Delivery Time
1-5 days depends on purchase quantity
TIANJIN SEMRI BEARING TECHNOLOGY CO.,LTD
If you need any types bearing,please contact us.We will do our best service for you.
http://www.semribearing.com/
