Electrical designers can access free library data from more than 250 component manufacturers
Zuken has signed a partnership agreement with CADENAS, a leading provider of online component libraries, and ECAD-Port, a specialized provider for electrical components library services.
The three p...
A cable gland is a device that allows the user to pass a cable, wire or tube into an enclosure while providing strain relief and sealing out dust, dirt, and liquids. Mencom cable glands are mainly categorized by three major mounting thread sizes: NPT, PG, and Metric. The chart below explains technic...
DMS and CMS magnetic sensor switches
AirTAC has recently realeased two new series of sensor switches for pneumatic cylinders: DMS e CMS series. These new series replace, respectively, the DS1 and CS1 series. The main difference between DMS and CMS is the mode of operation: DM...
UK BIM Alliance study shows a fresh way forward for manufacturer’s needing to provide a digital product representation
The CADENAS BIM solution complies fully with their recommendations
Digital Construction Week 2018 in London saw the anticipated release of the UK BIM Alliance ...
Turck's enhanced Li linear position sensors measure position values at a frequency of 5 kHz – at measuring lengths of up to 2 m
Turck has updated its contactless Li Q25 positioning systems and has now added new Extended variants to the program. The inductive measuring principle of...
Schiedel product catalog is awarded the "Golden Catalog Seal"
Schiedel GmbH & Co. KG adds the 3D BIM engineering data of their energy-saving chimneys of the ABSOLUT series as well as the entire range of Kingfire stove and heating systems to their Electronic Product Catalog powered by CADENAS they...
Engineers and purchasers can find their way directly to the desired component with the CADENAS intelligent search function
Butterfly caterpillars are very picky and usually prefer only a single fodder plant. As if that's not enough, another criterion of the search for the perfect fodder plant is ...
Manufacturer of concrete components for track and traffic-facility construction offers comfortable download of 3D BIM engineering data powered by CADENAS
RAILBETON HAAS KG has been specialized in the planning and production of concrete components for industrial and traffic-facilities construction...
Mencom offers the industrial communication solutions; Protocol gateways for legacy systems integration & Modbus Gateways for the conversion from the serial-based devices to Ethernet-based devices.
CADENAS Croatia was founded on 16th of October 2000 in Slavonski Brod, Croatia. From a simple start and just few employees, Croatian branch grew up to approximately 150 employees and it is still growing.
High quality work paid off and today they are responsible for more than 700 CAD product catalog...
Millions of 3D & 2D CAD models of supplier- and standard parts for SolidWorks, Solid Edge, Autodesk Inventor, CATIA, NX, Creo, u.v.m. for free download.
Discover our eChallenges and find out how you can win prizes every day by posting your personal experiences or taking part in several community related competitions.
In physics, a force is any interaction that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate. Force can also be de... moreIn physics, a force is any interaction that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate. Force can also be described intuitively as a push or a pull. A force has both magnitude and direction, making it a vector quantity. It is measured in the SI unit of newtons and represented by the symbol F.
The original form of Newton's second law states that the net force acting upon an object is equal to the rate at which its momentum changes with time. If the mass of the object is constant, this law implies that the acceleration of an object is directly proportional to the net force acting on the object, is in the direction of the net force, and is inversely proportional to the mass of the object.
Concepts related to force include: thrust, which increases the velocity of an object; drag, which decreases the velocity of an object; and torque, which produces changes in rotational speed of an object. In an extended body, each part usually applies forces on the adjacent parts; the distribution of such forces through the body is the internal mechanical stress. Such internal mechanical stresses cause no acceleration of that body as the forces balance one another. Pressure, the distribution of many small forces applied over an area of a body, is a simple type of stress that if unbalanced can cause the body to accelerate. Stress usually causes deformation of solid materials, or flow in fluids.... less
Torque, moment, or moment of force is rotational force. Just as a linear force is a push or a pull, a torque can be thought of as a twist to an object. In three dimensions, the torque is a pseudovector; for point particles, it is given by the cross produc... moreTorque, moment, or moment of force is rotational force. Just as a linear force is a push or a pull, a torque can be thought of as a twist to an object. In three dimensions, the torque is a pseudovector; for point particles, it is given by the cross product of the position vector (distance vector) and the force vector.
The symbol for torque is typically
τ
{\displaystyle \tau }
, the lowercase Greek letter tau. When it is called moment of force, it is commonly denoted by M.
The magnitude of torque of a rigid body depends on three quantities: the force applied, the lever arm vector connecting the origin to the point of force application, and the angle between the force and lever arm vectors. In symbols:
{\displaystyle \tau =\|\mathbf {r} \|\,\|\mathbf {F} \|\sin \theta \,\!}
where
τ
{\displaystyle {\boldsymbol {\tau }}}
is the torque vector and
τ
{\displaystyle \tau }
is the magnitude of the torque,
r is the position vector (a vector from the origin of the coordinate system defined to the point where the force is applied)
F is the force vector,
× denotes the cross product, which is defined as magnitudes of the respective vectors times
sin
θ
{\displaystyle \sin \theta }
.
θ
{\displaystyle \theta }
is the angle between the force vector and the lever arm vector.The SI unit for torque is N⋅m. For more on the units of torque, see Units. less
Rotational speed (or speed of revolution) of an object rotating around an axis is the number of turns of the object divided by time, specified as revolutions per minute (rpm), cycles per second (cps), radians per second (rad/s), etc..The symbol for rotati... moreRotational speed (or speed of revolution) of an object rotating around an axis is the number of turns of the object divided by time, specified as revolutions per minute (rpm), cycles per second (cps), radians per second (rad/s), etc..The symbol for rotational speed is
ω
cyc
{\displaystyle \omega _{\text{cyc}}}
(the Greek lowercase letter "omega").
Tangential speed v, rotational speed
ω
cyc
{\displaystyle \omega _{\text{cyc}}}
, and radial distance r, are related by the following equation:
v
=
2
π
r
ω
cyc
{\displaystyle v=2\pi r\omega _{\text{cyc}}}
v
=
r
ω
rad
{\displaystyle v=r\omega _{\text{rad}}}
An algebraic rearrangement of this equation allows us to solve for rotational speed:
ω
cyc
=
v
/
2
π
r
{\displaystyle \omega _{\text{cyc}}=v/2\pi r}
ω
rad
=
v
/
r
{\displaystyle \omega _{\text{rad}}=v/r}
Thus, the tangential speed will be directly proportional to r when all parts of a system simultaneously have the same ω, as for a wheel, disk, or rigid wand. It is important to note that the direct proportionality of v to r is not valid for the planets, because the planets have different rotational speeds (ω).
Rotational speed can measure, for example, how fast a motor is running. Rotational speed and angular speed are sometimes used as synonyms, but typically they are measured with a different unit. Angular speed, however, tells the change in angle per time unit, which is measured in radians per second in the SI system. Since there are 2π radians per cycle, or 360 degrees per cycle, we can convert angular speed to rotational speed by
ω
cyc
=
ω
rad
/
2
π
{\displaystyle \omega _{\text{cyc}}=\omega _{\text{rad}}/2\pi \,}
and
ω
cyc
=
ω
deg
/
360
{\displaystyle \omega _{\text{cyc}}=\omega _{\text{deg}}/360\,}
where
ω
cyc
{\displaystyle \omega _{\text{cyc}}\,}
is rotational speed in cycles per second
ω
rad
{\displaystyle \omega _{\text{rad}}\,}
is angular speed in radians per second
ω
deg
{\displaystyle \omega _{\text{deg}}\,}
is angular speed in degrees per secondFor example, a stepper motor might turn exactly one complete revolution each second.
Its angular speed is 360 degrees per second (360°/s), or 2π radians per second (2π rad/s), while the rotational speed is 60 rpm.
Rotational speed is not to be confused with tangential speed, despite some relation between the two concepts. Imagine a rotating merry-go-round. No matter how close or far you stand from the axis of rotation, your rotational speed will remain constant. However, your tangential speed does not remain constant. If you stand two meters from the axis of rotation, your tangential speed will be double the amount if you were standing only one meter from the axis of rotation. less
A rotation is a circular movement of an object around a center (or point) of rotation. A three-dimensional object can always be rotated around an infinite number of imaginary lines called rotation axes ( AK-seez). If the axis passes through the body's cen... moreA rotation is a circular movement of an object around a center (or point) of rotation. A three-dimensional object can always be rotated around an infinite number of imaginary lines called rotation axes ( AK-seez). If the axis passes through the body's center of mass, the body is said to rotate upon itself, or spin. A rotation about an external point, e.g. the Earth about the Sun, is called a revolution or orbital revolution, typically when it is produced by gravity. The axis is called a pole....
This video is an explanation of the math on the FAA Airframe test. You can learn to bend metal without doing this math - but this video is about doing the ma...