Original Japan KOYO Bearing 6204ZZ KOYO Ball Bearing 6301ZZ 6302ZZ Bearing Quality Choice Supplier's Choice

1.Specifications:

Koyo Ball Bearing , koyo Wheel hub Bearing, koyo axle bearing,koyo  wheel hub unit, koyo auto wheel hub units, hub bearings, auto bearing parts, auto part,koyo  auto wheel bearing 

2.Application:

Car Type include: For Audi,for Toyato,for Ford,for Volvo
this No. is used for RENAULT

3.Features:

Motion wheel hub is designed to support the vehicles weight.

This wheel hub is lubricated, sealed and complete with hub assembly.

They provide tight fit to the wheels and transmit power without slipping.
These hub assemblies are maintenance free, easy to install and increase product reliability while enhancing performance.

4.Quality&Services:

Cleaner Steel

If there was ever an opportunity to cut corners, this would be it; use a steel of marginal quality, sell at a reduced price and hope no one notices the difference. 

An innovator in bearing steel, SaiFan uses SUJ-2 steel for balls and rings.  SUJ-2 steel is ultra-clean, vacuum-melted bearing steel, much cleaner than typical industry standard steel.  With an oxygen content lower than 9 parts per million coupled with the proper treatment, saifan bearings have nearly double the fatigue life.

Superfinished Raceways and Maximum Sphericity

A super finish on both raceways means less wear at start-up, better performance out of the lubricant and smooth, quiet operation.  saifan accomplishes this through a proprietary method of honing the raceways to finishes at the sub-micron level.  For added value, saifan tests every bearing for low noise and vibration characteristics before the “quiet” rating is applied.

Rough bearing raceways inhibit lubrication and can lead to increased noise.  At SAIFAN, raceways for electric motor bearings are finished to a super-smooth condition using a custom honing process they developed specially for this purpose.  This finish guarantees excellent lubrication and extends bearing life.  To enjure the smoothest possible operation, SAIFAN uses high-grade steel balls manufactured using a proprietary process.  The result is an extremely quiet running bearing.

The ball set plays an integral role in the smooth and efficient operation of a bearing.  Not only do they need to be extremely close in size and tolerance, but are required to be nearly perfect in shape. At least by SAIFAN standards.

Cage Advancements

It’s the small things that sometimes make the difference.  Like the close tolerances SAIFAN achieves by coining the cage pockets.  The results are better distribution of the lubricant, less noise and reduced internal friction.  The benefit is a strong cage with a lower operating temperature and higher speed limits and ultimately it means longer bearing life. 

SAIFAN also provides molded polyamide cages with optimized ball pocket designs.  Their conformance with the rolling elements reduces friction for quieter operation with improved grease life.  Bearings with polyamide cages also have lower torque at high speeds and are more tolerant of misalignment.

High-Temperature Grease

SAIFAN offers a variety of lubricants to suit a wide range of applications.  When it comes to electric motors, the AS2 and NS7 greases are superior quality grade lubricants formulated to deliver low starting torque and extended service life. 

This grease offers high-temperature capability with low-noise characteristics in its electric motor bearings.  The wide temperature range prolongs the life of the grease, which in turn extends the bearing life.  You get smoother and quieter operation throughout the life of the bearing.

Quality from Start to Finish

In the manufacturing process, SAIFAN uses the latest in automated equipment to achieve superior consistency.  At each step in the process, the latest  Statistical Process Control (SPC) techniques are applied.  SAIFAN builds in quality you can count on, with thorough in process gauging.  Each bearing is tested for noise and vibration levels, using side-by-side Anderometer in the manufacturing line.  The Anderometers measure the degree of geometric and surface protection.  Any bearing that does not pass the low, medium and high-frequency tests is automatically rejected.

The Right Clearance

To accomplish that goal SAIFAN identified the optimum RIC for bearings: CM.  SAIFAN believes this range provides the right amount of clearance to meet the goal while controlling the air gap between rotor and stator, delivering quiet operation and increased efficiency. 

Shields, Seals and the VV

Bearings with two enclosures are pre-greased at the factory and are classified as “greased for life”.  This simply means that the type and amount of grease is sufficient to outlast most general applications, with the exception of temperature extremes, contamination, high load and high speed.

Enclosures are defined as either contact or non-contact and refer to any gap at the inner ring.  The popular Z metallic shield does a good job of keeping the grease in place and larger contaminants out of the bearings. SAIFAN applies an anti-corrosive coating to their Z shield in the event of moisture and because they are non-contact, their operating speed and starting torque are unaffected.

For more arduous service conditions, the seal is in full contact with the inner ring, increasing grease retention and excluding a wider range of contaminants from entering the bearing but generate more head and therefore have reduced operating speeds.  Enter the V seal from SAIFAN. Zero drag, low staring torque, maximum operating speeds, no excessive heat and increased grease retention and contaminant protection over the shield design.  The V seal from SAIFAN delivers an alternative that’s fast becoming the standard in all bearings.

Guaranteed Results

You can depend on SAIFAN for quieter running bearings with the design, manufacturing, and built in quality

We are manufacturing the first, the second and the third generation wheel hub bearing units, over 200 varieties. They are suitable for various famous cars e. G. for Nissan, for Audi,for  Hyundai,for  BMW,for Benz.
Products process: Advanced producing equipment, inspection equipment and good control system to keep the product produce smoothly.
Quality guaranty: Product quality assurance period is over year 2000 miles.
Superficial finish: Carefully work in the assembly line to confirm the products in perfect appearance. Products can also be manufactured according to drawings and samples with customers requirement. We sincerely welcome our friends to visit and negotiate business.
Meanwhile, we are looking forward to finding long-term partners.
We provide high quality product and excellent customer services.

5.Related Koyo Bearing Catalogue

NO.1  Professional Bearing Manufacture Production

Jinan Saifan Bearing Co., Ltd is a professional bearing manufacture located in Jinan, Shandong. We are established in year 2005 and we have 10 years experience in bearing manufacture.

We mainly produce wheel hub bearings, ball bearings, roller bearings etc.

We have abundant technical force, advanced technical machines, and complete detection ways. We can produce P0 -P4, Z2 Z3 Z4 grade bearings. We own a dozens of technical experts who compose to a high-quality professional marketing team which supply high quality service in the pre-sales, sale and after-sales; we can also produce bearings according customers’ request.

NO.2 Strict Production Process

NO.3 Provide Standard quality and competitive price products for customers