Product Description

No.1:Chemical composition of raw material inspection.

High carbon chromium bearings steel Gcr*5 is the standard material for precision bearing rings and balls.The material has uniform specification as AISL ****0(America),DIN**0Cr6(Germany),JISSUJ2(Japan).

No.2:Forging.

We will put the raw material for forging processing.
 

No.3:Inner & outer rings grinding.

1).After forging,we will begin grinding preliminary.Heat treatment.

2).After the heat treatment , begin surface grinding

3).After the surface grinding, then begin the second grinding**-Outer ring outer grinding and inner ring inner diameter grinding,Outer ring inner diameter     grinding(raceway) and inner ring outer diameter grinding(raceway).Channel is polish highly.

4).Super finishing. Rings have the superfinish surface and the channel is polish highly.
 

PS: The bearings accuracy:

No.4:Assembly.

We need to put the inner ring,outer ring,steel ball,cage together,and then we need to fill the grease.

PS:  1.Lubrication:

NSAR bearings include open type single or double shielded(Z,ZZ) and single or double sealed(RS,2RS).Before the shipment,we fill into the qualified oil or grease strictly.If you have any special request about the lubrication,please feel free to show us and we can fill the corresponding oil or grease with the accurate rate per your special request.

        2.Vibration and noise:

The vibration and noise of bearings are classified as four classes as Z1,Z2,Z3 and Z4.It is measured by the instrument of S*****1.For special requirement,it is measured by BVT*1 and classified as V1,V2,V3 and V4.

      3.Clearance:

Clearance is gap amid bearing inner ring,outer ring,ball package.Bearing has radial clearance and axial clearance.
 

No.5:Packing.

1.Single box package : Generally 1piece/single plastic bag, then put it in single paper box, and the box with our brand NSAR or 3D,also can as your requirements.
2.Industrial packing: Generally we use the plastic bag, single box, the carton, and the wood pallet.
3.As your requirements: The users who have any requirements in packing may write them down, then tell us.