Wirenet Image Band
wirenet.org mobile image band

The Book of Terms

  • Home
  • /The Book of Terms

The Book of TermsThe WJI Book of Wire & Cable Terms: an interactive experience of learning and sharing
This book, written by industry volunteers and containing more than 5,000 entries, is an asset for newcomers to wire and cable.

At the same time, it also represents an opportunity for industry veterans to give back by either updating or adding to the more than 5,000 entries. This is an honor system process. Entries/updates must be non-commercial, and any deemed not to be so will be removed. Share your expertise as part of this legacy project to help those who will follow. Purchase a printed copy here.

   

 

0-9   A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

RMS Voltage

Designation for the effective root-mean-square voltage in an AC circuit.

Rockwell Hardness Test

A test to deter­mine hardness by measuring the depth of the impression caused by an indenter in the form of either a diamond cone or a hardened steel ball. Not typically performed on wire below 3.2 mm (0.125 in.) in diameter.

Rod

The solid round form of metal that is the most effective shape from which to draw wire. Rod is commonly drawn into wire products or used to make bolts, nails and other machined parts.

Rod Mill

1) A mill that produces rod. It can be a billet rolling operation or an integral part of a continuous casting facility. 2) In the steel industry, it can be a mill for fine grinding, somewhat similar to the ball mill, but employing long steel rods instead of balls as the grinding medium.

Roke

A longitudinal surface defect caused by either a blowhole that has perforated the surface and become oxidized, or an in­clusion at the surface.

Roll

A length of a flat rolled product wound into cylindrical spiral except Stagger Wound Roll.

Roll Diameter Calculator Circuit

An electrical circuit used in conjunction with a wire-tensioning regulator and which requires a DC tachometer on the centerwind reel motor for speed indication purposes. Its main advantage is that it provides for taking the reel build-up range by any desired amount of field control while the remainder of the range is automatically taken by the armature voltage.

Roll Forming

1) A rolling mill operation used in forming metal sheet. Strips of sheet are passed between rolls of definite settings that bend the sheet progressively into structural members of various contours, sometimes called “molded sections.” 2) A rolling process of coiling metal sheet into open cylinders.

Roll Mark

A raised area on the metal sheet caused by the imprint of a pit or depression in the rolls during the rolling operation.

Roll Scale

Oxide of the basic metals that form on the surface of metal while it is being heated and rolled. Much of the scale is cracked and loosened during the rolling operation and may fall off the piece naturally or it may be blown off by high-pressure water sprays or other means.

Roll Straightening

The process of straightening wire, rod and bar by passing it lengthwise through a machine with suitable rolls so as to repeatedly flex the product.

Roll Table

A conveyer-type table surface that contains a series of small rolls over which metal products pass during processing.

Roll Threading

Applying a thread to a bolt or screw by rolling the piece between two grooved die plates, one of which is in motion, or between rotating grooved circular rolls.

Rolled Edge

A finished edge, the final contour of a rolled sheet of metal that is produced by side or edging rolls. The edge of a universal plate has when rolled by vertical, as well as horizontal rolls. On these plates, edge shearing is not necessary. The edge contours most commonly used are square corners, rounded corners and rounded edge.

Rolled-in Metal

An extraneous chip or sliver of metal (can be the same material or foreign material) that is rolled into the surface of a rod. Also referred to as rolled-in scrap.

Rolled-in Scratches

Scratches that occur during the fabricating process and are subsequently rolled over. The rolling over of the scratch makes it relatively smooth to the touch.

Roller

1) In rolling mill terminology, a part of a roller table which is more for material handling as contrasted with “roll” which is part of a rolling mill stand which is part of the product producing function. The roller transports the metal stock to the stands or acts as a carryout table after the specific operation releases the stock. 2) The person in charge of the actual rolling. 3) The component of a rolling operation that is designed to develop the product with a necessary profile, either progressive, grooved or whatever design is required.

Roller Die

Equipment very similar to a Turks Head but designed to replace conven­tional die boxes in drawing round rather than shaped wire. See Die, Roller.

Roller Table

Mechanism in various rolling and processing application that is used to receive the product as it is released from the operation, or used as a transfer device between operations. It usually consists of a conveyor made of rolls.

Rollerized Rod Delivery Pipe

The component in the delivery phase of the finished rod from a continuous cast rolling operation. It is usually designed to prevent scratches on the rod surface.
Display # 

Contact us

The Wire Association Int.

71 Bradley Road, Suite 9

Madison, CT 06443-2662

P: (203) 453-2777