LLC «El-Kran»
248 033, Kaluga,
2-oy Akademichesky proezd, 15

Technical terms per letter "H"

A B C D E F G H I K L M N O P R S T V W All
Hairline cracks (defects of metal) – one of the defects that violate the continuity of the metal, small cracks from one to several dozen millimeter long. Such cracks can be either on surface or in the depth of a metal sheet.
Heat treatment is the heating of metal to a critical temperature of 700-800 gr. and rapid cooling in oil, water or air stream with a temperature of 500-300 gr.
HFC (high frequency current) is a method of heat treatment when metal surface is exposed to the high frequency currents effect.
High-speed shaft gear (driving) - working name for a part in the gearbox to which rotatory mechanical energy is supplied.
Hoist is a suspended lifting system with a manual or mechanical drive. Can be used both independently and as a lifting mechanism in a variety of lifting cranes. Load capacity up to 5 tons.
Hook mouth diameter – the main dimension while designing a non-standard hook.
Hub (mech.) is the center of a rotating part (flywheel, pulley, gear etc.) having a bore to fit on a shaft or axes.
Hydraulic gear is a set of devices designed for machines and mechanisms driving by means of hydraulic energy.
Power transmission in a hydraulic gear is as follows:
- The drive motor transmits torque to the pump shaft, which energizes the working fluid.
- The working fluid in the hydraulic lines through the control equipment is supplied to the hydraulic motor, where the hydraulic energy is converted into mechanical one.
- The working fluid in the hydraulic lines is returned either to the tank or directly to the pump.
Hydraulic pusher – designed to convert by means of the hydraulic method the electric energy into mechanical linear movement and actuation of the lifting equipment brakes, lifting and transport equipment.
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