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Space manufacturing ball bearings

Space manufacturing ball bearings

Manufacturing ball bearings is cheap, quick and efficient which is one of the reasons they are used so prolifically in engineering. The main challenge of creating a high quality bearing is ensuring that a near perfect spherical ball is created with a very smooth surface, resulting in fast movement with minimal friction. Although manufacturers have pretty well mastered this art , a group of students in the 80s came up with a method of absolutely guaranteeing the highest quality of stainless steel ball bearings. Their ambitions were beyond sky high; the 12 students proposed travelling into outer space to take advantage of zero gravity and produce a bearing like no other.

VIDEO ON THE TOPIC: Ball Bearings Assembly Process

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The Science Experiment Which Took Off Like A Rocket - Creating Space Ball Bearings

Ever since man began to need to move things, he has used round rollers to make the job easier. Probably the first rollers were sticks or logs, which were a big improvement over dragging things across the ground, but still pretty hard work. Egyptians used logs to roll their huge blocks of stone for the pyramids. Eventually, someone came up with the idea of securing the roller to whatever was being moved, and built the first "vehicle" with "wheels.

It wasn't until the late eighteenth century that the basic design for bearings was developed. In , Welsh ironmaster Philip Vaughan patented a design for ball bearings to support the axle of a carriage. Development continued in the nineteenth and early twentieth centuries, spurred by the advancement of the bicycle and the automobile.

There are thousands of sizes, shapes, and kinds of rolling bearings; ball bearings, roller bearings, needle bearings, and tapered roller bearings are the major kinds. Sizes run from small enough to run miniature motors to huge bearings used to support rotating parts in hydroelectric power plants; these large bearings can be ten feet 3.

The most common sizes can easily be held in one hand and are used in things like electric motors. This article will describe only ball bearings.

In these bearings, the rolling part is a ball, which rolls between inner and outer rings called races. The balls are held by a cage, which keeps them evenly spaced around the races. In addition to these parts, there are a lot of optional parts for special bearings, like seals to keep oil or grease in and dirt out, or screws to hold a bearing in place. We won't worry here about these fancy extras. Almost all parts of all ball bearings are made of steel.

Since the bearing has to stand up to a lot of stress, it needs to be made of very strong steel. The standard industry classification for the steel in these bearings is , which means that it has one percent chromium and one percent carbon called alloys when added to the basic steel. This steel can be made very hard and tough by heat treating. Where rusting might be a problem, bearings are made from C stainless steel. The cage for the balls is traditionally made of thin steel, but some bearings now use molded plastic cages, because they cost less to make and cause less friction.

There are four major parts to a standard ball bearing: the outer race, the rolling balls, the inner race, and the cage. Bearing making is a very precise business. Tests are run on samples of the steel coming to the factory to make sure that it has the right amounts of the alloy metals in it. Hardness and toughness tests are also done at several stages of the heat treating process.

There are also many inspections along the way to make sure that sizes and shapes are correct. The surface of the balls and where they roll on the races must be exceptionally smooth. The balls can't be out of round more than 25 millionths of an inch, even for an inexpensive bearing. High-speed or precision bearings are allowed only five-millionths of an inch. Ball bearings will be used for many years to come, because they are very simple and have become very inexpensive to manufacture.

Some companies experimented with making balls in space on the space shuttle. In space, molten blobs of steel can be spit out into the air, and the zero gravity lets them float in the air. The blobs automatically make perfect spheres while they cool and harden.

However, space travel is still expensive, so a lot of polishing can be done on the ground for the cost of one "space ball". Other kinds of bearings are on the horizon, though. Bearings where the two objects never touch each other at all are efficient to run but difficult to make. One kind uses magnets that push away from each other and can be used to hold things apart.

This is how the "mag-lev" for magnetic levitation trains are built. Another kind forces air into a space between two close-fitting surfaces, making them float apart from each other on a cushion of compressed air. However, both of these bearings are much more expensive to build and operate than the humble, trusted ball bearing. Bowker, Eschmann, Paul.

Harris, Tedric A. Rolling Bearing Analysis, 3rd ed. Houghton, P. Elsevier Science Publishing Company, Inc. Nisbet, T. Rolling Bearings. Oxford University Press, Shigley, J.

McGraw-Hill, Inc. Gardner, Dana. March 23,, p. Hannoosh, J. November 21, , p. McCarty, Lyle H. May 20, , p. Toggle navigation.

Surprisingly, the rolling balls start out as thick steel wire. Then, in a cold heading process, the wire is cut into small pieces smashed between two steel dies. The result is a ball that looks like the planet Saturn, with a ring around its middle called "flash. The bulge around the middle of the rolling balls is removed in a machining proess.

The balls are placed in rough grooves between two cast iron discs. One disc rotates while the other one is stationary; the friction removes the flash. From here, the balls are heat treated, ground, and lapped, which leaves the balls with a very smooth finish. The four parts of a finished ball bearing: inner race, outer race, cage, and ball. Periodicals Gardner, Dana. Other articles you might like:. Follow City-Data.

Tweets by LechMazur. Also read article about Ball Bearing from Wikipedia. User Contributions: 1. This site is very useful for us.

Actually, I joined in a bearing manufacturing company, I learnt a lot through this info. It's really good. It is very helpful to me. For all mechanical engineers,the info should be useful. Comment about this article, ask questions, or add new information about this topic: Name:. E-mail: Show my email publicly. Human Verification:. Public Comment: characters. Send comment.

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Ball Bearing

Ever since man began to need to move things, he has used round rollers to make the job easier. Probably the first rollers were sticks or logs, which were a big improvement over dragging things across the ground, but still pretty hard work. Egyptians used logs to roll their huge blocks of stone for the pyramids. Eventually, someone came up with the idea of securing the roller to whatever was being moved, and built the first "vehicle" with "wheels.

Robert Heinlein said that common wisdom is almost always wrong, by a factor of at least ten thousand to one. Harry Stine. Stine believed that access to the space environment, including weightlessness, vacuum, and radiation, would revolutionize manufacturing.

Language :. MinebeaMitsumi MinebeaMitsumi Inc. NHBB, Inc. More than a bearing Partnerships Sub-systems Matching Customization. Machine tool bearings Axial-radial-bearings Double angular contact roller bearings Crossed roller bearings Needle axial cylindrical roller bearings Download catalogues Service Assembly services.

Language :. MinebeaMitsumi MinebeaMitsumi Inc. NHBB, Inc. More than a bearing Partnerships Sub-systems Matching Customization. Machine tool bearings Axial-radial-bearings Double angular contact roller bearings Crossed roller bearings Needle axial cylindrical roller bearings Download catalogues Service Assembly services. Applications Dental technology Automotive industry Aerospace technology Medical technology Machine tool bearings. References some References. Job Opportunities Why join myonic?

Открылось окно - такие же цифровые часы, как на ТРАНСТЕКСТЕ, которые должны были показывать часы и минуты работы Следопыта.

Однако вместо этого Сьюзан увидела нечто совершенно иное, от чего кровь застыла в жилах. СЛЕДОПЫТ ОТКЛЮЧЕН Следопыт отключен. У нее даже перехватило дыхание. Почему.

Звук мотора, похожий на визг циркулярной пилы, заставил его повернуться. Парень крупного сложения и прильнувшая к нему сзади девушка въехали на стоянку на стареньком мотоцикле Веспа-250.

Его аналитический ум искал выход из создавшегося положения. Сознание нехотя подтверждало то, о чем говорили чувства. Оставался только один выход, одно решение. Он бросил взгляд на клавиатуру и начал печатать, даже не повернув к себе монитор.

Вы не поставили в известность Лиланда Фонтейна. Терпение Стратмора иссякло. Он взорвался: - Сьюзан, выслушай .

ГЛАВА 36 Ручное отключение. Сьюзан отказывалась что-либо понимать. Она была абсолютно уверена, что не вводила такой команды - во всяком случае, намеренно. Подумала, что, может быть, спутала последовательность нажатия клавиш. Немыслимо, - подумала. Согласно информации, появившейся в окне, команда была подана менее двадцати минут .

Он пытался, сэр! - Мидж помахала листком бумаги.  - Уже четыре раза. ТРАНСТЕКСТ заклинило. Фонтейн повернулся к окну. - Господи Исусе.

News from Mars myonic ball bearings are also spinning on and around Mars! In orbit around Mars – the Indian space probe Mangalyaan. On September

Просто позор. - Могу я для вас что-нибудь сделать. Клушар задумался, польщенный оказанным вниманием. - Если честно… - Он вытянул шею и подвигал головой влево и вправо.

Военной службе пришел конец. Отсидев некоторое время в тюрьме, Хейл занялся поисками места программиста в частных компаниях. Он не скрывал от нанимателей того, что случилось с ним во время службы в морской пехоте, и стремился завоевать их расположение, предлагая работать без оплаты в течение месяца, чтобы они узнали ему цену.

В желающих принять его на работу не было недостатка, а увидав, что он может творить на компьютере, они уже не хотели его отпускать.

Участники движения за гражданские свободы торжествовали и настаивали на том, что АНБ ни при каких обстоятельствах не должно читать их почту. Программы компьютерного кодирования раскупались как горячие пирожки.

Никто не сомневался, что АНБ проиграло сражение. Цель была достигнута.

Я могу прямо сейчас отвести вас в участок… - Беккер выразительно замолчал и прищелкнул пальцами. - Или?.

Сто десять? - оживился Джабба.  - Сколько будет сто десять минус тридцать пять и две десятых. - Семьдесят четыре и восемь десятых, - сказала Сьюзан.  - Но я не думаю… - С дороги! - закричал Джабба, рванувшись к клавиатуре монитора.  - Это и есть ключ к шифру-убийце.

По-прежнему чепуха, - с отвращением скривился Джабба.  - Смотрите. Это просто бессмысленный набор букв… Слова застряли у него в горле, глаза расширились.  - О… Боже ты мой… Фонтейн тоже все понял. Брови его поползли вверх. Он был потрясен. Мидж и Бринкерхофф охнули в унисон.

Беккер так и не узнал, какие страшные секреты он помог раскрыть, ни одна вещь не вызывала у него никаких сомнений. АНБ очень серьезно относилось к дешифровке. Полученный чек превышал его месячное университетское жалованье.

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  1. Tygoran

    You are not similar to the expert :)