Technical terms per letter "S"
Screw (in a crane hook assembly) is a part screwing into the hook thread, with the help of which the hook is nutted up in a hoisting mechanism unit. It must be obligatory fixed by a locking plate to avoid screwing off.
Seal (mech.) is a sealing device that is installed in the joints of the object parts, also at shaft input and outputs in the housing of the mechanism.
Shaft (mechanical) – a part designed to maintain other details in order to transfer the rotary moment. A shaft in use experiences bending and torsion
Shaft gear - a part uniting both the shaft and the gear assembled as one unit.
Shank (of a hook) is a hook part that serves to fix the hook.
Sheave (mech.) is a friction (from lat. "frictio") wheel with a rim or a groove along the circle.
Shoe brake is a brake where the shoes pressed against the wheel rim. Used in lifting equipment to stop and hold the shafts of the mechanisms in a locked mode at the idle motor.
Single gearing is a mechanical transmission consisting of one pair of gears (driving and idle gear).
Sleeve bore diameter – a diameter of the place where a hollow sleeve is seated to a shaft.
Sorbitizing is a type of steel heat treatment that involves steel heating above the upper critical point temperature and cooling at a speed of 100 600 °C per min (by air jet or in a liquid medium, heated to 300 500 °C). Used in the treatment of products with raised demands for their mechanical properties
Speed increasing gear is a transmission in which the driven gear angular velocity is greater than the drive gear angular velocity
Speed reducing gear is a transmission in which the driven gear angular velocity is less than the drive gear angular velocity
Sprocket (mechanical) – name of profile tooth wheels in contact with the caterpillar band in a chain drive. Sprockets, unlike gear wheels, do not come into contact with each other.
Stamped blank (stamping) is the input material for the crane wheel production with a provided minimal inlet diameter of the shaft and a slot for a hub, manufactured from 65G steel by stamping. Supplier of stampings JSC "Uralskaya kuznitsa"
Stamping is the process of metal treatment by pressing where parts are formed in a special tool called a stamp press. A finished part obtained by stamping called stamped part (or a stamping).
Standard crane wheel are those in the production of which stamped blanks are used (stampings).
Stationary blocks (mech.) are blocks whose axes are placed in fixed supports and cannot move in space. These blocks are only used for changing the direction of movement of the flexible element (rope, chain). In crane machinery stationary block pulleys are usually fixed on a crane jib.
Steel maek 65G material selection for crane wheels production complies with GOST 28648-90. This very steel brand allows producing wheels with the highest performance.