Resources

Glossary


A B C D E F G H I J L M N O P Q R S T U V W Y Z
Garnet

A coated abrasive grain, red in color, made by crushing semi-precious garnet material. Coated on both cloth and paper backings. Garnet is widely used in the woodworking and furniture manufacturing industry.

Gate

The part of a casting formed by the opening in the mold through which the metal is poured. Removed by grinding the gate flush with the casting.

Generated Heat

Heat resulting from the removal of metal or wood by a coated abrasive product.

Glazing

Formation of a layer of the material being ground over the cutting edges of abrasive grains. It can be avoided or minimized by proper selection of abrasive, contact wheels, use of fluids or greases, or changing belt speeds.

Glue

A coated abrasive adhesive produced by the hydrolysis of animal hides. It is gelatinized by water and dries to form a strong adhesive layer and may be used with or without filler.

Glue Bond

Coated abrasive products that use animal hide glue in both the maker and size adhesive coats. The glue may be used alone or with an inert filler or extender.

G.P.M.

Gallons per minute.

Grading

The process used to separate abrasive grains into specific size groupings.

Grain

Abrasive particles classified into predetermined sizes for use on coated abrasive products.

Gapped Joint

Refers to a belt joint condition in which the two joint ends do not butt tightly together. There is a space or gap at the point of contact of the belt ends. This condition may lead to premature product failure.

Grain Fracture

Refers to the shape and structure characteristics of abrasive grain used for coated abrasive products.

Grain Size

The nominal size of the abrasive particle expressed in grit number (e.g. 50 grit).

Grain Spacing

The relative position of the abrasive grain on the coated abrasive product, usually expressed as open-coat or closed-coat.

Guards

Metal structures covering exposed moving parts (fly wheels, gear, etc.), as well as the abrasive product, on a grinding and polishing machine, designed to protect operators from personal injury.

Groove

Refers to the slots in a serrated contact wheel or roll adjacent of the lands. Land-to-groove ratio has significant bearing on the aggressiveness of a contact wheel.

Graphite Coated Canvas

Canvas with a layer of graphite adhered to it. Designed to reduce friction on a platen type grinding machine, it is used between the platen and the back of the belt.

Gravity Coat

A process by which the abrasive grain is applied to the adhesive coating (of a coated abrasive product) by gravity flow.

Grease Stick

Compounds of grease, lubricants and binders sold in ?stick? form, which are applied to the coated abrasives during use to retard loading and improve metal finishes.

Grinding

Removing material with a coated abrasive product, usually referring to the use of coarser grit sizes.

Grinding Action

Refers to the cutting ability of, and the finish produced by, a coated abrasive.

Grinding Aid

The generic term covering coolants and lubricants applied to coated abrasives to improve cut, finish, and durability by reducing heat and loading. May be water, various oils (in emulsion or straight), or greases in stick form.

Grinding Burr

See Burrs.

Grinding Wheel

A cutting tool of circular shape made of abrasive grains bonded together.

Grit

Designation of abrasive grain size, reflecting the number of the smallest openings per linear inch in the screen through which the grain will pass.

VSM Abrasives Co.
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