kN High Precision Steel Bearing Roller 4*3.8mm

• Customization: Available
• Customized: Customized
• Certification: ISO
• Model NO.: 4*3.8
• Universal: Yes
• Type: Bearing Roller
• Material: Chrome Steel
• Hardness: HRC60-65 .
• Sample Confrimation: Available
• Special Mateiral: Available
• Price: Negotiable
• Transport Package: Plastic Bag, in Box, in Carbon in Wooden Case
• Specification: 4*3.8
• Trademark: Neutral packaging
• Origin: China
• HS Code: 8482400000
• Production Capacity: 500000000

Product Description

High precision steel bearing roller

Size customizaiton available
Diameter from 0.50mm to 30mm,
Lenght from 2.00mm to 300mm,
Quality Grade: G5, G3, G5  also according to client's require, by drawing or sample
Brand: KN STEEL BALL
Price: depend on roller size, quality grade, material, quantity.  
Material:  mainly are chrome steel,GCR15, AISI52100, 100cr6, stainless steel AISI306, AISI304, AISI420,AISI440, AISI440C, and carbon steel AISI1015, and speical material customized by client.
Customization: Roller size, shape, could be produced according to client's drawing, or samples. 
Hardness: HRC60-65 for chrome steel roller, and HRC25-28 for stainless steel roller,  HRC58-61 for carbon steel roller
For bulk purchase, sample free for confirmation supplied by KN STEEL BALL.
Application for roller bearing production, and other machinery parts. application areas: Bearing rollers, nozzles of turbojet engine nozzles, plungers, valves, bushings, etc.
Packing: usuall in plastic bag, then in box, then in carton, then on pallet. Or, customized by user special requirement.
Delivery terms: For stock items, delivered within 3 days. For new items, usually 15-45 days, according to quantity and qaulity grade.
Delivery by FEDEX, DHL courier for small quantity.  And by train, air, sea for larger quantity.
Outer circle tolerance 2-5um length tolerance 30um verticality≤15um end runout≤15um roundness≤1um surface roughness≤Ra1um
Inspection instruments:

 

 

Name	Needle roller
Model	4*3.8
Material	GCR15, SUJ2 , AISI52001
Hardness	HRC60-65
Out Diameter Tolerance	0.0005mm
Length Tolerance	+0/-0.01mm
Parallelism	0.005mm
Perpendicularity	0.005mm
Endface Runout	0.005mm
Roundness	0.0005mm
Roughness	Ra0.06um

2.0mm Series	2 * 1.90, 2 * 2, 2.5 * 3.5
3.0mm Series	3 * 2.85, 3 * 3, 3.5 * 6.0
4.0mm Series	4 * 3.8,  4 * 4, 4 * 6.8
5.0mm Series	5 * 4.8, 5 * 5, 5 * 6, 5.5 * 8
6.0mm Series	6 * 5.8, 6 * 6, 5 * 9
7.0mm Series	7 * 6.8, 7 * 7
8.0mm Series	8 * 7.8, 8 * 8
10.0mm Series	10 * 9.8, 10 * 10

Appliction:
1: Precision rotary table bearings
2: Joint bearings
3: Crossed roller bearings
4: Precision main shaft bearings
5: High precision bearings

Product Description

 

Special roller of speical size, tolerance, special material, customization is available.