Drill for large diameter. Drawing, description

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Drill for large diameter. home workshop

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In the practice of a home master, there are often cases when it is necessary to drill a hole of a large diameter, but there is nothing. In this case, a home-made hollow drill suitable for non-ferrous metals, plastics, and wood will help out. After it remains a cylindrical blank, which can also be used, and quite a bit of chips.

The basis of the drill is a steel pipe of a suitable diameter, into the end of which six hard alloy cutters are soldered. A mandrel with a Morse taper No. 3 or No. 4 is welded into the opposite end.

Holes are made in the pipe wall for the chips to exit the cavity during drilling.

Large diameter drill
Homemade drill: 1 - mandrel, 2 - tubular body, 3 - cutting plate

Author: V. Bezrukov

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Night milk is healing 04.07.2005

Finnish dairy farms are producing a new product: night milk.

It turns out that if you milk a cow at night or in the morning, but in a darkened room, the milk contains 10 times more melatonin, the sleep hormone, than in ordinary morning, afternoon or evening milk. Melatonin is also produced in the human body, but with age and under the influence of stress, its secretion is greatly reduced. Therefore, drinking a glass or two of nightly milk before bed is recommended for all older people and those who find it difficult to fall asleep.

The novelty is in great demand in Finland. Hundreds of farms have switched to night milking, especially since the new sort of milk is noticeably more expensive than usual. In addition, physiologists have found that night milking increases the fertility of cows.

But in Switzerland, where a farmer tried to take advantage of the Finnish experience, night milk was banned shortly after it appeared on store shelves. The reason is the strict Swiss laws on food, drugs and dietary supplements. A food product cannot be claimed as a remedy for disease or a means of preventing them, and even a mild form of insomnia is considered a disease by law.

High levels of melatonin should not be reported on milk bottles, as melatonin is a hormone, hence a drug. Perhaps later in Switzerland they will be allowed to sell night milk in pharmacies.

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