Cummins Appoints Lin Jing as General Manager of East Asia Distribution Division

Lin Jing officially took the position of General Manager of Cummins East Asia Distribution Division

As a global power leader, Cummins designs, manufactures and distributes diverse power solutions and provides service support. Cummins currently provides products and service support to customers in more than 190 countries and regions through more than 600 distributors and more than 7,500 distributors worldwide. Cummins currently has 16 regional distribution service centers in China and more than 2,000 Cummins wholly-owned and joint venture authorized dealers to provide users with fast and efficient distribution service solutions. Cummins China's new parts and remanufacturing business brings more cost-effective component solutions to customers through innovative technologies and processes, and increases the availability of regional parts and components and reduces user costs.

In his new role, Lin Jing will manage and integrate parts, services and engine distribution businesses in China and Mongolia, integrate resources, develop sustainable post-market operating models, further drive business growth, and further improve post-marketing capabilities. Promote a customer-integrated service system, develop long-term channels and service capabilities, and bring higher service standards to end users; at the same time, create a good working environment and promote all functions of the distribution division and new parts and remanufacturing businesses. Develop and build more excellent service capabilities to support customer development more efficiently.

Lin Jing joined Cummins' US headquarters in 2002 as the Purchasing Manager of the Global Purchasing Department of the Engine Division. During her 12 years at Cummins headquarters, Ms. Lin Jing held various positions, including VPI Purchasing Leader, Strategy Manager, Joint Venture Strategy Leader and ISG Project Business Development Director. In October 2014, Lin Jing became the general manager of Cummins China's new parts and remanufacturing business.

After becoming the general manager of the East Asia Distribution Division, Lin Jing became the general manager of Cummins' first women's division in the region. This further embodies the corporate culture of Cummins' diversified development and empowering women's leadership. Lin Jing graduated from Nankai University with a bachelor's degree in mathematics statistics. She also obtained an MBA from the Kelly School of Business at Indiana University.

Cylindrical roller bearings

    Cylindrical roller bearings are separable, easy to mount and dismount especially more outstanding when they are used on bearings requiring interference fit between inner and outer rings with the shaft and housing. Cylindrical Roller Bearing is contacted with the fair line between the rollers and the raceway, which is of elimination of edge stress. Comparing with the ball bearings, with same boundary dimensions, cylindrical roller bearings have larger radial carrying capacity. Comparing with structure, this type of bearing is more suitable for high speed rotation.

Structures

1.  N0000 type cylindrical roller bearings without rib on outer ring and NU0000 type cylindrical roller bearings without rib on inner ring

These type of bearings can carry large radial load, rotate at a high speed, there is no limit to axial displacement on shaft or housing, but cannot withstand axial load.

2.  NJ0000 and NF0000 types Cylindrical roller bearings with ribs on both of inner rings and outer rings

    NJ0000 and NF0000 types of bearings can allow axial displacement on the shaft or housing and carry little single-direction axial load; NU0000+HJ0000 types and NUP0000 type bearings can allow two-direction displacement within axial clearance range on the shaft and housing and carry little double-direction axial load.

3.  RNU0000 Type Cylindrical roller bearings without inner rings.

RNU0000 types of bearing are applicable to the parts with limitation on radial size. The shaft surface can be directly used as raceway surface, the hardness, processing precision and surface roughness should be similar to those of ring raceway.

 4.NAL0000 type and NNAL0000 type of long cylindrical roller bearings with double ribs on outer rings are applicable to petroleum machinery.

5.Four-row cylindrical roller bearings FC,FCD and FCDP types are mainly applicable to heavy-duty machines, such as rolling mills. These bearing designations are different from general rule.

Cage material

    When the outer diameter is less than (inclusive)400mm, solid brass cage or steel sheet are adopted for Single Row Cylindrical Roller Bearing. When the outer diameter is more than400mm, brass cage and pin-type cage are adopted for four row cylindrical roller bearing.

Permissible tilt angle

    Generally the Cylindrical Roller Bearing shaft is not allowed to be tilted relative to the housing; while for single-row cylindrical roller bearings, when under light load, a relative2`tilt angle is allowed between the inner ring axial line and outer axial line. If the load is larger, the allowable error can be a little more, but should not exceed4`.

Tolerance and clearance

In accordance with requirement, Single row cylindrical roller bearings can be different tolerance classes. The tolerance value can be finding in the section Rolling Bearing Tolerance. For four row cylindrical roller bearings, the tolerance is normally P0, P6 and P5.

The Radial clearance of cylindrical roller bearing is as attached table 1.

Load-carrying capacity

    The load-carrying capacity of cylindrical roller bearings with ribs on inner rings and outer rings are related to the magnitude of the radial load and lubrication methods. The maximum allowable axial load is as following:

            Oil lubrication

               Grease lubrication

     Fap<0.4F_r

Fap-(N);Maximum allowable axial load

K-Factors related to bearing size series

2.3  series       K=0.2;

22.23  series       K=0.16.

C_0r-(N);Basic static load rating

ng-F_r>0.1C_r,

(r/min);For the limit rotational speed of a bearing carrying       a purely radial load, when F_r>0.1C_r, use the speed reduction factor to compensate the limit rotational speed.

n-(r/min).Actual operating rotation speed

As the axial load given by the above formula and under the following conditions, bearing with tolerance class 0 (except improved and enhanced types) can function normally:

The temperature of oil lubricate is55℃and grease lubricate is40℃, the highest is90℃. (The viscosity of lubricate oil is ν50=30mm²/s, and the dropping point of lubricate grease is170℃.)

If the axial load is acted internally, the allowable axial load can be doubled; when acted temporally, the allowable load can be increased by 2 times.

Dynamic equivalent radial load

          P_r=F_r

For the cylindrical roller bearing with axial load

2.3

To 2 and 3 series

          P_r=F_r+0.3F_a         (0≤F_a/F_r≤0.12)

          P_r=0.94F_r+0.8F_a     (0.12≤F_a/F_r≤0.3)

22.23

To 22,23 series

          P_r=F_r+0.2F_a         (0≤F_a/F_r≤0.18)

          P_r=0.94F_r+0.53F_a    (0.18≤F_a/F_r≤0.3)

Static equivalent radial load

               P_0r=F_r

Table 1  Radial clearance of cylindrical roller bearing with cylindrical bore

                                                  Î¼m

Cylindrical Roller Bearing

Single Row Cylindrical Roller Bearing,Double Row Cylindrical Roller Bearing,Three Row Cylindrical Roller Bearing,Four Row Cylindrical Roller Bearing

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