Henley's Twentieth Century Formulas, Recipes and Processes. Various

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СКАЧАТЬ for the soft alloys generally in use for bearings a metal almost as hard as the axle itself. Phosphor bronze (q. v.) is frequently employed for this purpose, as it can easily be made as hard as wrought or cast steel. In this case the metal is used in a thin layer, and serves only, as it were, to fill out the small interstices caused by wear on the axle and bearing, the latter being usually made of some rather easily fusible alloy of lead and tin. Such bearings are very durable, but expensive, and can only be used for large machines. For small machines, running gently and uniformly, white-metal bearings are preferred, and do excellent work, if the axle is not too heavily loaded. For axles which have a high rate of revolution, bearings made of quite hard metals are chosen, and with proper care—which, indeed, must be given to bearings of any material—they will last for a long time without needing repair.

WHITE METAL FOR BEARING.
	Tin	Antimony	Zinc	Iron	Lead	Copper
I	German, light loads	85.00	10.00	—	—	—	5.00
II	German, light loads	82.00	11.00	—	—	—	7.00
III	German, light loads	80.00	12.00	—	—	—	8.00
IV	German, light loads	76.00	17.00	—	—	—	7.00
V	German, light loads	3.00	1.00	5.00	—	3.00	1.00
VI	German, heavy loads	90.00	8.00	—	—	—	2.00
VII	German, heavy loads	86.81	7.62	—	—	—	5.57
VIII	English, heavy loads	17.47	—	76.14	—	—	5.62
IX	English, medium loads	76.70	15.50	—	—	—	7.80
X	English, medium loads	72.00	26.00	—	—	—	2.00
XI	For mills	15.00	—	40.00	—	42.00	3.00
XII	For mills	—	1.00	5.00	—	5.00	—
XIII	For mills	—	1.00	10.00	—	2.00	—
XIV	Heavy axles	72.70	18.20	—	—	—	9.10
XV	Heavy axles	38.00	6.00	47.00	—	4.00	1.00
XVI	Rapidly revolving axles	17.00	77.00	—	—	—	6.00
XVII	Very hard metal	55.00	—	—	70.00	—	2.50
XVIII	Very hard metal	12.00	82.00	2.00	—	—	4.00
XIX	Cheap metal	2.00	2.00	88.00	—	—	8.00
XX	Cheap metal	1.50	1.50	90.00	—	—	7.00

      Other white СКАЧАТЬ