Drawn cup needle roller bearings

Description:

1. (1) The outer ring of drawn cup needle roller bearing is punched with the high-quality steel sheet. The outer ring has thin wall. 

(2) The bearing is assembled into the housing bore under a certain pressure without further axial location.

 2. The drawn cup needle roller bearing generally takes its shaft diameter as the internal raceway. However, the proper LR type inner ring can be used in accordate with application condition.

3. (1) The drawn cup needle roller bearing has two structures with retainer and full of needles. They are divided into open-end type and close-end type.

(2) The structure with retainer has the single seal ring and double seal ring. The structure with full of needles has a large load carrying capacity.

4.CWN can provide all drawn cup needle roller bearings listed in this catalogue, including standard size and non-standard metric size, and inch-series as well as the high-precision drawn cup needle roller bearings with soecial requirements such oil hole in outer ring, double-row needles, nylon retainer, inner ring, seal ring, etc.(special technical requirement on order).

Characteristics:

1. Small radial section area, large load carrying capacity, less inertia and economic manufacture.

2. It is suitable for small section height, or when the housing bore is not used for raceway, this type is recommended to use.

Inspection:

In accordance with ZBJ11020 standard and inspection regulations of the world needle roller bearing manufacturing company (such as Japan NTN,KOYO,Germany INA, American TORRINGTON). 

Since the punched outer ring has thin wall and is easy to be deformed in heat treatment, it is unnecessary to inspect the outside diameter of bearing before installation. 

Only when the inspected bearing is pressed into the standard housing bore, the final size and geog raphic accurancy can be obtained. 

The tolerance of housing bore size shall be in conformity with regulations ( see Table-1). The inscribed circle diameter for needle roller will confirm to the range of tolerance F8.

Recommended tolerance of shaft and housing bore

Table 1

Note:

The correct measuring method for tolerance of inscribed circle diameter of needle roller:

 1. In measuring, the inspected bearing and standard part should be under same temperature. The standard temperature for inspection is 20 ℃.

 2. As for the inspection of single minor inside diameter deviation Fwmin for package bearing roller set, it shall be inspected with limit plug gauge.

Company

Operating since 1985
Jiangsu Jiujiu Traffic Facilities was founded in 1985. We are a new type of enterprise integrating research, manufacture and sale of auto parts in China.

Following Various Standards for Quality Assurance
Our company is committed to the development and production of special metric and inch needle bearings, steel jackets, and automotive two-point simple, self-lock two-point, emergency locking three-point, and pre-tensioner seat belts, as well as other related products.

We are strong in technology and own advanced production and testing machines. We strictly follow international standards during production, which makes our products conform to CCC, US DOT, CE and E-Mark (ECER16) standards. We also got ISO/TS 16949:2009 certification.

Furnished with Modern Machinery
Advanced technology:

• Tilting presses, instrument lathes, centerless grinding machines, 
• Wire cutting electrical discharge machines, abrasive finishing machines, 
• Computer knot tying machines, computer controlled lockstitch sewing machines,
• Ultrasonic welding machines, RCW-80-9 mesh belt heat treatment furnaces and other production equipment, 
• Totaling to over 100 pieces. 
• Hardness testers, metallurgical analysis apparatus, 
• Salt spray (corrosion) test chambers, machines for tensile, dust, retractor durability, restitution power, lock durability and opening force testing, 
• As well as high-low temperature testing chambers, to ensure the highest product quality.

 

Rated as “A” Level
Our products are of reliable quality, superior performance and have elegant appearance. Over the years, we have supported many large- and medium-sized automobile factories, and have been rated as "A" level supporting enterprise.

 

 

 

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