For decades, the Schaeffler Group's INA brand has stood for creative application solutions, great engineering and manufacturing expertise and a strong customer focus. Thinking outside the box, that is, taking new paths to develop ideas and think beyond barriers, is just as important now as it was when the company was first established.

Dr. Georg Schaeffler, who founded the company with his brother Wilhelm in 1946, demonstrated what it means to think outside the box as early as 1949. At this point, his development of the needle roller and cage assembly – a pioneering innovation – helped the needle roller bearing achieve an industrial breakthrough. Georg Schaeffler’s inventive spirit and his will to succeed have become a permanent part of corporate culture in more than 35 plants worldwide.

      Needle bearings use a roller style rolling element to reduce friction of a rotating surface. Needle Bearings have a high load carrying capacity with a very small cross section height. They are available with or without an inner ring. The needle rollers are guided parallel to the axis using a cage retainer, thrust bearings can also be supplied with no retainer, which is referred to as a full complement of rollers.

      Needle bearings have a larger surface area that is in contact with the bearing outer surfaces compared to ball bearings. Additionally there is less clearance, or the difference between the diameter of the shaft and the diameter of the bearing, so they are much more compact. The typical structure consists of an inner race (or sometimes merely a shaft), a needle cage which orients and contains the needle rollers, the needle rollers themselves, and an outer race.Needle bearings are heavily used in engine components such as rocker arm pivots, pumps, compressors, and transmissions.

 

      A needle bearing is a type of bearing that features roller elements which are longer and thinner than traditional roller bearing elements. Due to its considerably smaller roller diameters, the needle bearing is ideally suited for applications where reduced overall bearing heights are required. Notwithstanding the small roller diameters, needle bearings have good load bearing capacities and are often used in large numbers in automotive engines and other high stress, precision applications. Needle bearings are available in a wide range of designs including caged or full compliment bearings and sealed or open bearings. There are also angular contact varieties of this bearing available which combine needle roller and ball bearing elements.

      Roller bearings use sets or cylindrical roller elements instead of the more traditional balls. Needle roller bearings follow the basic design principles of a normal roller bearing with an inner and outer race which contain and orientate a set of roller elements between them. The inner race is pushed onto the shaft of the machine and the outer race is held captive in an end cap or outer frame. The rollers then offer low friction support for the shaft when it rotates. The main difference between conventional roller bearings and needle bearings is the roller diameter.

Quick Details
Type: Needle Brand Name: RDRJ Bore Size: 10 - 1000 mm
Outside Diameter: 20 - 1500 mm Model Number: NA4910 Precision Rating: P0 P4 P5 P6
Seals Type: open Number of Row: Single Row 

Packaging & Delivery
Packaging Detail: Marking and Pakcing: RDRJBrand Marking; Neutral Marking; or without any marking. Tube packing, industry paper rolling packing or single box packing in cartons, and in wooden pallets.
Delivery Detail:

15-20days

 

Specifications

1.Many years trade experience
2.Service:OEM available
3.For Fan,Motor,Tools,Machinery,
4.Speed:4800 r/min-6000 r/min

 

Products  name

Needle bearing

Model

NAV4912

ID  size

50*72*22mm

Cage  material

No

Precision

PO,P6,P5,P4

Quality  standard

ISO9001:2000 standard

Service

OEM  service

Delivery  date

Normally ready goods and stock within 15days

Payment terms

A:100% L/C at  sight

B: 30% T/T in advance .70% against copy of  B/L

Application

Automobile, tractor ,machine tool, electric machine, agricultural machinery and textile machinery.

Package

Industrial package or according to your requirement.

Quick Details
Type: Needle Brand Name: KSZ Bore Size: 6 - 6.001 mm
Outside Diameter: 19 - 19.001 mm Model Number: AXK0619-TV Precision Rating: P0 P6 P5 P4
Seals Type: open without sealed Number of Row: Single Row Place of Origin: China (Mainland)


Packaging & Delivery
Packaging Detail: Separate or according to customs' required
Delivery Detail: 7-45days


Specifications

1 OEM serives and design serives offered
2 Excellent quality and competitive price
3 Low noise and vibration, ISO90001:2000

 

Our company mainly engaged in exporting all kinds of bearings made in china.We can also product the bearings according to your requirements.Our products are widely used in metallurgy, electric power, mining, machinery manufacturing, food, pharmaceutical, automotive, textile, chemical, aerospace and other fields.we are a professional company engaged in trading import and export business.Choosing us choosing the best !

 

 Welcome your inquiry for all the time!

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