1.High precision 2.Smooth surface 3.Can meet customer's requirements 4.Good quality and reasonable price 5.Good service

We are manufacture of cylindrical rollers and needle rollers.

1.The details of 5*17.8mm bearing roller 

Material standard:GCr15

Diameter : 5mm

Tolerance:0/-3μm 

  The picture of needle roller:

       2.The details of our products:

Material	GCr15,Stainless steel,20crmo,40crmo,45#
Our main products	Needle roller,roller,shaft,needle roller  bearing
Needle roller length tolerance	0~0.2mm
Roller length tolerance	0~0.03mm
Diameter tolerance	0~0.001mm
Use	Widely used in machinery industry
Diameter	0.7mm to 80mm
Length	2mm to 150mm
Hardness standard	HRC58—65
Grade	G1,G2,G3,
Certificate	ISO 9001

Table 2 Dimension Tolerance and Geometrical Precision

Quality  grade	Deviation (μm)	Tolerance of each sort (μm)	Group of sort Deviation  (μm)	Roundness Tolerance(Max)	Length Tolerance
G2	0-10	2	0/-2,-1/-3,-2/-4	1	h13
			-3/-5,-4/-6,-5/-7
			-6/-8,-7/-9,-8/-10
G3	0/-10	3	0/-3,-1.5/-4.5,-3/-6	1.5
			-4.5/-7.5,-6/-9,-7/-10
G5	0/-10	5	0/-5,-3/-8,-5/-10	2.5

  The shape of  end

Shaft

3.About material-----GCr15 

 (1)What's GCr15?

GCr15 is the mostly widely used high-carbon  chromium  bearing steel  with  less  alloy content and good performance.It has high and uniform hardness, good 

abrasion resistance and high contact fatigue performance after heat-treatment 

and tempring.

 (2)The details of GCr15

Elment	C	Si	Mn	P	S	Cr
Content	0.95-1.05	0.15-0.35	0.20-0.40	≤0.027	≤0.020	1.30-1.65

(3)GCr15 in other country

 executive standard:

China GB/T18254-2002

Japan JIS G4805:1991  

USA ASTM A295:1998  

Unified digital code :B00150

Country	China	US	Janpan	Germany	France	ISO
Grade	GB	AST	JIS	DIN,DINEN	NP,NPEN	ISO630
Bearing steel Chrome steel	GCr9	51100	SUJ1
	GCr15	52100	SUJ2	100Cr6	100Cr6	1
	9Cr18Mo	440C	SUS440C	Z100C D17

 4.Show you part of our process flow:

  

 5.Package:

6.This is our Plant:

7.Quality Control

You should believe the quality of our products,because we have these machines to control our quality.

8.Certificate

We have many kinds of conventional types of needle roller .

We are also according to your request,and special specifications like to receive customized plans.

 For more informations,please contact with me!

Diameter 5mm bearing roller using in machinery