1What are the components of a conrad bearing Describe the fe

1-What are the components of a conrad bearing? Describe the features of this bearing?

2-Describe the design and feature of a drawn cup needle bearing. List an application that you will recommend the usage of such a bearing? Also find out two manufacturers that make drawn cup needle bearings. List their web sites?

True or False

1- Plain bearings can handle heavier loads at higher speeds than rolling element bearings.

2-Ball bearings are typically applied in high-load applications, whereas roller bearings are best suited for high speed.

3-Needle bearings can carry heavy radial loads in a minimum amount of radial space.

4-Radial bearings support loads perpendicular to their axis.

5-Bearings cannot support both radial and axial loads.

6-Two basic types of radial ball bearings include filling slot and nonfilling slot.

7-Tapered bearings are designed to carry heavy thrust loads and minimal radial loads.

Solution

1. The components of Conrod bearings are Outer ring, Inner ring, shoulders, bore corner, seperator, inner ring ball race and outer ring ball race.

Features:

Hard drive bearings used to be highly spherical, and were said to be the best spherical manufactured shapes, but this is no longer true, and more and more are being replaced with fluid bearings.

German ball bearing factories were often a target of allied aerial bombings during World War II; such was the importance of the ball bearing to the German war industry.

In horology, the company Jean Lassale designed a watch movement that used ball bearings to reduce the thickness of the movement. Using 0.20 mm balls, the Calibre 1200 was only 1.2 mm thick, which still is the thinnest mechanical watch movement.

Aerospace bearings are used in many applications on commercial, private and military aircraft including pulleys, gearboxes and jet engine shafts.

Skateboard wheels each contain two bearings, which are subject to both axial and radial time-varying loads.

2. Drawn cup needle bearing:

Drawn cup needle roller bearings are used in applications where the housing bore cannot be used as a raceway for a needle roller and cage assembly, but where a very compact and economical bearing arrangement is required. These bearings are normally mounted with a tight interference fit in the housing. That enables a simple and economic design of the housing bore..The drawn cup of hardened steel and the needle roller and cage assembly of these bear­ings form a non­-separable unit.

Below are the manufacturers:

www.dxsz.cc/UK/

http://www.nskamericas.com/cps/rde/xchg/na_en/hs.xsl/needle-roller-bearings.html