twisted at the central part , until the throws are at right angles with each other — the grain of the iron running across the throws ; by this method they are not so liable to split through . Some cranked axles are bent with the aid of hydraulic machinery , a long bar being heated and put into the… … same diameter throughout with Fig . 497 . — Straps on Inside Cranks . a , Crank bold curves at the corners , while in pin . b , Axle . c c , Straps . others the pin curves from the middle to the sides of the crank ; by this means greater strength is obtained over those that are finished parallel .…
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