Descriptions
Needle roller bearing is a bearing unit composed of machined outer
ring & inner ring,cage and needle roller assembly featuring
small section height,big load capacity & rigidity,compact
structure and small size,high rotating accuracy with the structure
of disposed inner ring.
Needle roller bearing is characterized by multiple structures,broad
adaptability and easy installation.
It is widely used in automobile,machine
toll,lathe,metallurgical,textile,printing industry and etc. Various
machinery equipment.
With this kind of bearing,machine design can realize the goal of
small-scale & light weight.
Types of Designs:
This kind of bearing has multiple structural styles for the choice
of customers,such as narrow & broad series,with or without
inner rings,cages,rib or sealings. It can be designed according to
the special structural requirements of customers as well.
Product Precision Accuracy:
Dimensional tolerance and geometrical accuracy is based on
GB/T5801.Mutual difference of needle roller diameter is 2 um,and
the
precision grade is class G2(ISO GB/T309)
The diameter of inscribed circle conforms to tolerance grade F6
before the fitting of outer ring with cage and roller assembly.
Bearing radial running clearance conforms to the value defined by
class 0 group of GB/T4604 Special precision grade in based on
GB/T307.1
For fuller information on the special requirement of bearing
running clearance, inscribed circle and precision grade,please
contact our company.
Material:
Material for needle roller is GCr15 bearing steel,quench-hardening
HRC60-65
Material for inner and outer rings is GCr15 bearing
steel,quench-hardening HRC60-65
Material for cages is quality low-carbon steel or reinforced nylon.
Special Directions:
Bearing running clearance and inner-cutting roundness should be
regulated according to different conditions.
Machine tolls should be used for press-in fitting or thermal
fitting when install the bearing.Limited by plastic cages(suffixed
with TN) and sealing-element material ,operating temperature is
-30℃--+100℃
For general-disposition design of bearings,refer to the relevant
recommendation in the applied technology of roller bearings.
