Precision Paper Tube Company is the foremost supplier of custom produced dielectric tubing, bobbins, insulating forms and molded parts for the electrical-electronic industries. Spiral and convolute wound tubing, as well as molded parts, are available in a wide choice of materials, including very high temperature and high dielectric strength, flame retardant, plus resin impregnated and lower cost materials as well as U/L approved.
Precision Paper Tube Company has developed an extensive molded bobbin production capacity including the latest multi-cavity injection molding equipment (up to 475 tons pressure - 42oz. capacity). Due to the high output of this equipment, large quantities can be produced at very low cost. Accuracy is extremely uniform because of precise die tolerances and tooling. A wide variety of thermoplastic materials is available to provide desired electrical and mechanical properties coupled with cost factors. Any practical size molding bobbin, or IF and RF coil form, may be produced.
Extensive equipment, over 70 years of experience, knowledgeable personnel and in-depth stock of dielectric insulating materials, give us the ability to turn out fabricated insulating parts to your exacting specifications.  Whether the part you require is produced from a flat piece of material or from a circular, or tubular form we can manufacture the intricate shapes and conformations for Insulators, Washers, Gaskets, Protectors, Switch Covers, Shields, Spacers, Bushings, Flanges, Discs, Grommets, Dust & Fuse Covers, Light Shields, Standoffs, Chart Rollers, Liners, Separators, Shims, all at minimum cost.

Many of the materials listed in this catalog may be combined to provide a tube with specific requirements not available in a single material. Some of the more useful combinations and their suggested applications are shown below. We will be glad to work with you in developing a combination for your particular use. The high dielectric strength of Mylar is combined with the low cost and mechanical strength of kraft. The higher strength and good abrasion resistance of vulcanized fiber (fish paper) along with the filling ability of kraft, provides an excellent core where metal laminations are inserted into the inside of the tube. Mylar lined Resinite tube that is threaded by embossing, provides a smooth surface for iron cores. Due to the low coefficient of friction the core will not bind. Resinite provides an excellent low cost tubing of high mechanical strength. Mylar can also be buried in a Resinite tube. Low cost light shields and light reflectors can be produced from a combination of metal foil, such as aluminum, and kraft. Copper foil is wound within layers of Mylar, or other specified material, to provide an electrical ground plane. A combination of other metals and other tubing materials may also be combined for specific uses. Molded coil forms can have an insert of Resinite phenolic tubing so that soldering of attached lugs poses no problem. Pyroform 310: Kraft Dielectric kraft is buried between layers of Pyroform-31O to provide a high temperature tube along with the mechanical strength of kraft. Entire tube may be resin impregnated after fabrication. The high temperature properties of Nomex are combined with the mechanical strength of dielectric kraft. For even higher mechanical strength, Nomex is combined with Resinite phenolic impregnated tubing. And for a completely flame retardant tube, Nomex can be combined with FR-9120 Resinite. In most cases, the Nomex is wound on the outside of the tube.

Precision Paper Tube Company began production for the electrical and electronic industries in 1934 and remains the preeminent producer of these type of products.  Over 100,000 square feet in the main manufacturing plant are devoted to the production of insulating parts, principally spiral wound tubing and bobbins.  Specially constructed, modern, high speed equipment at Precision provides high quality parts at low cost.