magnetic induction b also known as magnetic flux density has the si unit tesla t or wb/m 2 . one tesla is equal to 10 4 gauss. magnetic field drops off as the cube of the distance from a dipole source. orders of magnitude. these examples attempt to make the measuring point clear, usually the surface of the item mentioned.
magnetic reluctance, or magnetic resistance, is analogous to resistance in an electrical circuit although it does not dissipate magnetic energy . in likeness to the way an electric field causes an electric current to follow the path of least resistance, a magnetic field causes magnetic flux to follow the path of least magnetic reluctance. it is a scalar, extensive quantity, akin to electrical .
magnetic particle imaging mpi is an emerging non-invasive tomographic technique that directly detects superparamagnetic nanoparticle tracers. the technology has potential applications in diagnostic imaging and material science.currently, it is used in medical research to measure the 3-d location and concentration of nanoparticles.imaging does not use ionizing radiation and can produce a .
magnetic declination, or magnetic variation, is the angle on the horizontal plane between magnetic north the direction the north end of a magnetized compass needle points, corresponding to the direction of the earth's magnetic field lines and true north the direction along a meridian towards the geographic north pole .this angle varies depending on position on the earth's surface and .
the demagnetizing field, also called the stray field outside the magnet , is the magnetic field h-field generated by the magnetization in a magnet. the total magnetic field in a region containing magnets is the sum of the demagnetizing fields of the magnets and the magnetic field due to any free currents or displacement currents.
a magnetic switchable device often called a magnetic base is a magnetic fixture that uses one or more permanent magnets in a configuration that allows the external field to be turned on or off. they are used in many applications including optics, metalworking, lifting, and robotics, to attach items to metal surfaces in a secure but temporary way.
surface grinder, which has a head that is lowered to a work piece, which is moved back and forth under the grinding wheel on a table that typically has a controllable permanent magnet magnetic chuck for use with magnetic stock especially ferrous stock but can have a vacuum chuck or other fixture means. the most common surface grinders have .
a vacuum table is similar to a 'magnetic clamping table' in use, typically, to the same end as a vacuum table except instead of vacuum, the magnetic table uses electromagnetic attraction to restrain ferrous materials to the table facilitating ease of access for modern machining. a vacuum table, of course, is not limited to ferrous materials.
special neodymium magnet alloys that include terbium and dysprosium have been developed that have higher curie temperature, allowing them to tolerate higher temperatures. the table below compares the magnetic performance of neodymium magnets with other types of permanent magnets.
flick grinder with magnetic chuck. this article does not cite any sources. please help improve this article by adding citations to reliable sources. unsourced material may be challenged and removed june 2008 learn how and when to remove this template message a flick grinder is a surface grinder or tool and cutter grinder, its usage is varied, but it may be used where great accuracy is not .
surface grinding surface . and a reciprocating table. grinding is commonly used on cast iron and various types of steel. these materials lend themselves to grinding because they can be held by the magnetic chuck commonly used on grinding machines and do not melt into the wheel, clogging it and preventing it from cutting. materials that are less commonly ground are aluminum, stainless steel .
a surface plate is a solid, flat plate used as the main horizontal reference plane for precision inspection, marking out layout , and tooling setup. the surface plate is often used as the baseline for all measurements to a workpiece, therefore one primary surface is finished extremely flat with tolerances below 11.5 μm or 0.0115 mm per 2960 mm for a grade 0 plate.
a special type of sine bar is sine centre which is used for conical objects having male and parts. it cannot measure the angle more than 45 degrees. a sine table or sine plate is a large and wide sine bar, typically equipped with a mechanism for locking it in place after positioning, which is used to hold workpieces during operations.
correct units of magnetic susceptibility in cgs is cm 3 /mol or cm 3 /g. molar susceptibility and mass susceptibility are both listed in the crc. some table have listed magnetic susceptibility of diamagnets as positives. it is important to check the header of the table for the correct units and sign of magnetic susceptibility readings.
dressing the wheel refers to removing the current layer of abrasive, so that a fresh and sharp surface is exposed to the work surface. trueing the wheel makes the grinding surface parallel to the grinding table or other reference plane, so that the entire grinding wheel is even and produces an accurate surface. see also. diamond tool