The UCF pillow block mounted bearing series has four bolt holes, and a set screw lock is designed for mounting onto bearing surfaces parallel to the shaft axis, such as conveyor belts. This ready-to-mount unit has solid base cast iron housing, chrome steel bearings, and is designed for efficient operation at a wide range of speeds. This one-piece pillow block housing allows for a stationary outer ring and rotating inner ring. Insert bearing maintains the separation between moving parts to reduce rotational friction, and to support radial and axial loads. The bearing is secured to the shaft with set screws to prevent slippage. This mounted bearing is used in food and beverage manufacturing, textile industry and many other industrial manufacturing.
Pillow blocks are usually referred to the housings which have a bearing fitted into them & thus the user need not purchase the bearings separately. Pillow blocks are usually mounted in cleaner environments & generally are meant for lesser loads of general industry. These differ from "plummer blocks" which are bearing housings supplied without any bearings & are usually meant for higher load ratings & corrosive industrial environments. However the terms pillow-block & plummer-block are used interchangeably in certain parts of the world. Ucf Pillow Bearing,Ucf Pillow Block Bearing,Ucf 207 Flange Bearing,Flange Mounted Pillow Block Bearing Shijiazhuang Longshu Mechanical & Electrical Equipment Trading Co., Ltd. , https://www.longsbearings.com
According to the Hong Kong "Wen Wei Po" report, the African country Botswana has the largest diamond in more than 100 years - Canada's Lucara Diamond Company has mined a 1111 card gem-quality diamond in a mine in the central part of the country, almost the size of a tennis ball.
Some experts pointed out that because the price of diamonds is still looking at color, clarity and cutting, it is difficult to estimate its value; Lucara sold a 341.9-card diamond of the same class IIa in July this year and sold it for $20.6 million.
The largest diamond ever discovered in history was the Cullinan diamond, which was unearthed in South Africa in 1905 and weighed 3,106 calories, and was partially set in a crown in the UK. 
Lukara Diamonds immediately announced the photo of the diamond. It is reported that the size of the diamond is 65 x 56 x 40 mm. According to Lukala, this natural type IIa diamond is only slightly smaller than tennis. It is by far the world's second largest diamond.
According to Des Kilalea, an analyst at RBC Capital Markets, the diamond is worth at least $35 million, possibly up to $50 million, according to past sales records. Another industry professional estimates that it is worth between $70 million and $80 million. In July 2015, Lukla sold a similar-grade diamond weighing 342 carats for $20.55 million.
Lamb said that the diamond mined in Karowe is "historical" and may affect its value. "I wake up at 4 am every night this week. I feel amazing and lucky. This is the first diamond that has been mined by humans for more than 1,000 carats in a hundred years," said Lamb.
The world's largest diamond, the Cullinan Diamond, was discovered in 1959 at the Cullinan mine in South Africa. The diamond weighing 3,067.75 carats was cut into 9 large and 96 small, the largest of which were set in the scepter and crown of the Queen of England.
The Republic of Botswana is located in the southern outback of Africa and is the world's largest value-produced diamond producer with a maximum annual production of more than 30 million carats of diamonds.
However fundamental application of both types is the same which is to primarily mount bearings safely enabling their outer ring to be stationary while allowing rotation of the inner ring. The housing is bolted to a foundation through the holes in the base. Bearing housings are either split type or unsplit type. Split type housings are usually two piece housings where the cap and base can be detached. While certain series are one single piece housings. Various seals are provided to prevent dust and other contaminants from entering the housing. Thus the housing provides a clean environment for the expensive bearings to freely rotate hence increasing their performance and duty cycle.
Bearing housings are usually made of grey cast iron. However various different grades of metals can be used to manufacture the same.
Africa finds the size of the century giant diamonds such as the value of tennis is difficult to estimate
Summary William Lamb, CEO of Lukla Diamonds, said: "The discovery of this gem-quality diamond will make the Lukla and Karowe mines among the few truly outstanding diamond producers." Said...
William Lamb, CEO of Lukla Diamonds, said: "The discovery of this gem-quality diamond will make the Lukla and Karowe mines among the few truly outstanding diamond producers."