What is the definition of "magna-vise clamp"?
A two-piece magnetic clamping system with flexible fingers designed to hold nonferrous or very small workpieces during grinding.

Learn more about magna-vise clamp in the class Surface Grinder Operation 240 below.


Abrasives Training


Class Information
Tooling U classes are offered at the beginner, intermediate, and advanced levels. The typical class consists of 12 to 25 lessons and will take approximately one hour to complete.
Class Name:Surface Grinder Operation 240
Description:This class discusses the steps involved in grinding horizontal and vertical surfaces with a horizontal-spindle, reciprocating-table grinding machine.
Prerequisites: 250110  250120 
Difficulty:Intermediate
Number of Lessons:17
Language:English, Spanish

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Below are all the competencies and job programs that contain the class Surface Grinder Operation 240. Job programs are our traditional class lists organized according to common job functions. Competencies are our latest job-specific curricula that help tie online learning to practical, hands-on tasks.

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Class Outline
  • Objectives
  • Horizontal-Spindle, Reciprocating Table Surface Grinding
  • Components of the Machine
  • Workholding Components
  • Workholding Accessories
  • Mounting the Workpiece
  • Settings and Roughing
  • Grinding Flat Surfaces
  • Grinding Parallel Sides
  • Finishing Parallel Sides
  • Grinding Edges
  • Mounting the Workpiece on a Fixture
  • Grinding the Edges of a Workpiece
  • Squaring the Fifth and Sixth Edges
  • Mounting the Workpiece for Vertical Grinding
  • Grinding a Vertical Surface
  • Summary
  
Class Objectives
  • Describe grinding on a HSRT surface grinder.
  • Describe components of the HSRT surface grinder.
  • Describe common workholding components.
  • Describe accessories for workholding.
  • Describe how to mount a workpiece.
  • Describe the process of roughing a workpiece surface.
  • Identify settings for finishing a workpiece.
  • Describe grinding parallel sides.
  • Describe grinding the second side.
  • Describe edge grinding considerations.
  • Describe mounting a small, thin workpiece to a fixture.
  • Identify the steps necessary to grind the edges of a workpiece.
  • Describe squaring the fifth and sixth edges.
  • Describe mounting a workpiece for grinding a vertical surface.
  • Describe grinding a vertical surface.

Class Vocabulary

Vocabulary TermDefinition
adapter plate A flat steel and brass component used to improve the hold on thinner workpieces. The angle plate converts the larger and widely spaced flux to smaller and closely spaced flux, which better grasps thinner workpieces.
angle plate A workholding component used to establish an accurate 90° vertical surface. Angle plates are used to grind edges.
balance The process of making a wheel round or concentric. Balancing may be accomplished through several methods, including truing with a diamond dresser.
base The foundation of a grinding machine that supports all the other machine components.
column A component at the top of the grinding machine that supports the spindle and vertical ways, and controls vertical motion of the grinding wheel.
crossfeed handwheel A grinding machine component that controls movement along the saddle ways.
dress To remove swarf, dull grains, and bonding material from a grinding wheel. Dressing sharpens the wheel.
electromagnetic chuck A type of magnetic workholding device that produces a variable magnetic pull. When turned "on," the electromagnetic chuck can hold a variety of workpieces depending on the amount of direct current.
finishing The final grinding operation intended to obtain the desired tolerance and surface finish.
fixture A device that is used to position and hold a workpiece in place during grinding. Fixtures are normally used to hold smaller workpieces.
flux Invisible lines of magnetic force produced by a magnet.
horizontal spindle A grinding spindle with an axis that is oriented parallel to the table.
HSRT Horizontal-spindle, reciprocating table. A type of surface grinding machine characterized by a spindle with an axis oriented parallel to a table that moves back-and-forth.
laminated V-block A magnetic workholding component with a V-shaped groove down the middle of its body designed to hold round workpieces for light grinding. The laminated V-block sits on the magnetic chuck and extends flux while providing physical support.
magna-vise clamp A two-piece magnetic clamping system with flexible fingers designed to hold nonferrous or very small workpieces during grinding.
magnetic chuck A workholding device that is used to hold ferrous parts during grinding. Magnetic chucks can be permanent or electromagnetic.
magnetic chuck block A magnetic workholding component that sits on the magnetic chuck and holds oddly shaped workpieces by extending flux and providing physical support.
magnetic parallel A magnetic workholding device used to support warped or otherwise oddly shaped workpieces that would otherwise flatten out when magnetically chucked.
magnetic V-block An electromagnetic workholding component with a V-shaped groove down the middle of its body designed to hold round, square, or rectangular workpieces.
nonmagnetic chuck A workholding device that is used to hold nonferrous parts for grinding, usually with two jaws that grip and hold a workpiece in place.
oilstone A fine-grained sharpening device that is typically lubricated with oil. Oilstones are used to remove minor abnormalities from workpieces and workholding devices.
permanent magnetic chuck A type of magnetic workholding device consisting of a series of long magnetic inserts arranged side-by-side and interconnected within a grid of conductive material. The chuck is turned "on" by moving magnetic inserts inline with a conductive grid.
polarity The direction of magnetic force. A line of polarity is a line of magnetic force, which must travel through a workpiece for the workpiece to be immobilized by a magnetic chuck.
reciprocating table The grinding machine work surface characterized by the ability to move back-and-forth. Workholding devices hold the part on the reciprocating table.
relieved Providing a clearance for subsequent machining operations.
roughing An initial grinding operation that removes stock without regard to surface finish.
saddle The component of a grinding machine that is attached to the ways of the base and through its own ways, allows motion in a third axis perpendicular to the axes of the other ways.
shim A thin tapered metal component used to support a workpiece by filling small gaps or abnormal shapes.
spindle housing A grinding machine component that contains the spindle.
surface grinding A common grinding process that involves feeding the flat surface of a workpiece beneath a rotating grinding wheel as the workpiece reciprocates on a table.
surface grinding machine A machine that grinds flat surfaces by feeding a workpiece beneath a rotating grinding wheel with the part held on a reciprocating table.
table handwheel A grinding machine component that controls motion of the table along the base ways.
table reverse dogs A control component of a grinding machine that reverses the direction of table movement at the end of a stroke.
true To restore a grinding wheel to its original shape. Truing is also a method of wheel balancing.
vacuum vise A workholding device used when grinding certain types of nonferrous workpieces. A vacuum vise uses air suction to immobilize the workpiece.
ways Two precisely measured, parallel tracks that support and guide the movement of the grinding machine components, such as the reciprocating table and spindle housing.
wheel feed handwheel A grinding wheel component that controls the incremental vertical motion of the wheelhead along the column ways.
wheelhead A grinding machine component that is attached to the column ways and contains the spindle housing.