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
Pinch Rolls

A set or series of opposed rolls (usually rubber), which apply pressure to the workpiece to maintain proper feed rate and workpiece alignment during the abrasive grinding operation.

Pits

Small holes in the surface of a metal, usually caused by corrosion or formed during electroplating operations.

Plastometer

1.Instrument used to determine the flow properties of a thermoplastic resin by forcing molten resin through a specified die opening or orifice at a given pressure and temperature. 2.C & J Plastometer – a measurement of rubber ?hardness? on a scale of 20 (very hard) to 200 (very soft).

Platen

A flat or shaped support which backs up a coated abrasive belt in the area where the workpiece is applied. Usually metal or wood, the platen may be surfaced with resilient material and a lubricant such as graphite covered canvas.

Platen Grinder

A coated abrasive machine utilizing a platen. The platen provides an area contact to the coated abrasive. Unit pressures are usually low.

Plunge Grinding

The grinding or polishing of a surface where the direction of movement between the work and abrasive is infeed only. There is no cross feed.

Pneumatic Drum Sanding

Contour sanding of chair stock and related parts with coated abrasive sleeves mounted on canvas-covered inflatable rubber drums.

Polishing Jack

A machine that uses setup wheels or buffs for polishing. Very easily converted to use coated abrasives.

Pickling

Preferential removal of oxide or mill scale from the surface of a metal by immersion, usually in an acidic or alkaline solution.

Peripheral Speed

The speed at which any point on the outside periphery of a rotating tool is traveling when the tool or wheel is revolving. Expressed in surface feet per minute (S.F.PM.) and determined by multiplying the circumference in feet by the revolutions per minute (RPM) of the disc or wheel.

Pencils

Sometimes called ?cartridge rolls?, pencils consist of a continuous strip of aluminum oxide cloth wound around a centerhole designed to accept the mandrel of a high-speed power tool.

“P” Grade

See F.E.P.A.

Pad Sander

A small, handheld machine using coated abrasives sheets fastened to the pad.

Parting Line

A line or seam on a cast or molded part corresponding to the joint of mold parts.

Polishing

Smoothing or refining a rougher finish or surface or imparting a fine finish on metals by the use of coated abrasives.

Pressure Assist

Use of a mechanical, pneumatic or hydraulic device to apply force to the workpiece in its contact with the abrasive belt.

Pump Sleeve

Coated abrasive product that is made for mounting on a pneumatic pump drum.

Polyester (P.E.S.)

A synthetic cloth material used as a backing for coated abrasive products.

Portable Grinder

A coated abrasive sanding machine that is used by hand (manually) and can be easily handled and manipulated by the operator.

Pouncing Sander

A coated abrasive paper used to ?pounce? or finish felt hats. The pouncing process removes hair fibres, producing a smooth, even nap on hat crowns and brims.

Precision Work

Work which is required to be exact in measurements, finish, etc. Work that must be ground with great care.

Profile

Refers to the surface configuration of a workpiece, namely, details of grinding surface, finish, flatness, etc.

Profilometer

An instrument for measuring the degree of surface smoothness in micro-inches or micro-meters.

PSA

Pressure Sensitive Adhesive. An adhesive applied to the backing of coated abrasive products which permits easy product application and removal to and from a backup pad.

PSI

Pounds Per Square Inch. A unit of measure equal to the pressure resulting from a force of one pound applied uniformly over an area of one square inch.

Pump Drum

Inflatable drums made of rubber covered with a canvas boot, used for contour sanding chair stock and related parts. The abrasive cloth sleeve is mounted and the drum is inflated to whatever density is required.

VSM Abrasives Co.
Representative Access