Читать книгу The Handyman's Book of Tools, Materials, and Processes Employed in Woodworking - Paul N. Hasluck - Страница 177

The best way of brightening a quantity of nails that are very rusty is to dip the nails in oil and put them in a bag with emery powder; by rapid friction some of the rust may be removed. Such articles should be kept in a dry place, when they would not rust. A tumbling drum often is used for cleaning rusty nails, etc. The apparatus consists of a barrel, with a door in it, which runs eccentrically on a spindle, the spindle being driven either by hand or steam. Into the drum are placed river sand, moistened with dilute sulphuric acid, and then the articles to be cleaned. When the drum is revolved the articles are continuously shifted, so that every part is polished. Screws that are too small for separate treatment may be cleaned as follows: Take, say, one pound of screws, and place them in a small box, such as a cigar box. Put a small quantity of oil on them and shake for a minute; then put a piece of cotton waste in the box, and repeat for a minute; finally put a handful of sawdust in the box and shake for another minute or so, and remove the sawdust by sifting it from the screws in a fine sieve. This treatment will be found effective. Larger quantities are apt to be ruined by being shaken together, the sharp corners, threads, and points rapidly disappearing.

Fig. 470.—Withdrawing Nail with Pincers.