Technical terms per letter "B"

Bearing is a shaft or axis support locating the position of the rotating or swinging parts of the mechanism in relation to the other parts of it

Bevel gearbox is a bevel gear with intersecting axes, the gear wheels of which has all surfaces conical.

Block (mechanical) is a wheel with a full-circle groove, rotating on itself.

Box (crane) is a part which holds crane wheel bearings and connects the crane frame and the wheel

Brake shaft is a part of any brake mechanism with an axial pressing. And the force operating along the axis of this mechanism creates braking torque.

Braking safety factor for a mechanism of a lifting machine with power drive makes 1,5 at light duty; 1.75 at average duty; 2 at severe duty and 2,5 at extremely heavy duty. The derricking gear breaking safety factor must be not less than 1.5.

Braking system is a system intended to reduce motion speed and/or stop a vehicle or a mechanism. It also allows preventing a vehicle or a mechanism from uncontrolled motion at rest mode.

Bridge (overhead) crane – a crane designed as a top running or under running bridge crane with a truck (hoist). The bridge moves along the crane rails, for example, along the span of the working shop, and the truck along the bridge across the span. Load capacity from 5 to 450 tons