Drawing Process

Drawing involves pulling the hollow tube through a series of hardened steel dies of gradually decreasing diameter. Before each step of the drawing process , the tube is pointed at one end to fit through the next smaller die. It is then gripped by automatic jaws attached to a rotating 7 feet diameter drawing machine called a bull block. Before drawing a tapered plug mandrel is placed inside the tube ( floating plugs are used with bull blocks, stationary mandrels are used for relatively short length of tube that are drawn linear draw benches). As the tube is drawn onto the spinning bull block, the mandrel and die act together to reduce both the tubes outside diameter and its wall thickness.

The mandrel also makes the tubes inside surface smoother. Tube that is passed through a series of straightening rolls for straighting. Annealing softens the tube so that it can be bent to shape during installation. Finally the tube is cleaned to remove any traces of drawing lubricants or other contaminants. Samples of the finished tube are analyzed at regular intervals to ensure that it meets of all requirements of size, wall thickness and quality as required under applicable standard.

Forging Process

Forging process for cable lugs involves forging of annealing copper tubes of various sizes with heavy power presses of various tonnage.

Tin Plating

Copper terminals are Electro Tinnedto ensure uniform coating which ensures maximum conductivity and corrosion resistance. Plating thickness is measured in microns by digital thickness meter which ensures uniform coating.


Outer Box

Strong Sea worthy corrugated 8 ply carton laminated with tar coated hessian cloth, properly marked with shipping mark, Net weight, Gross weight , and number of individual carton.

Inner Box

Inner boxes are 5 ply laminated boxes with description of item, size and quantity in each boxes. Material is packed in locked plastic bags with proper stickers on each plastic bags indicating items catalogue number and quantity.