"Delrin® acetal resin emerged from DuPont's efforts to capitalize on the success of nylon and the growing post World War II market for plastics and other synthetic materials. Efforts to develop a tough and heat resistant metal substitute began in the early 1950s, and by 1952 chemists in the Polychemicals Department had synthesized an inflexible polymer from formaldehyde that assistant research director Frank C. McGrew called "synthetic stone" and DuPont named Delrin®.

After four years of development DuPont patented Delrin® in 1956 and began construction of a 20-million pound annual-capacity production plant at Parkersburg, West Virginia, completed in 1960. As manufacture commenced, total research and development costs for the project topped $50 million dollars. DuPont fully expected to recover these costs by marketing Delrin® as a general substitute for nonferrous metals, but a patent dispute and stiff competition held profitability down. As a result, DuPont focused subsequent research efforts on more sophisticated and specialized engineering polymers.

Delrin is the brand name for an acetal resin engineering plastic invented and sold by DuPont. Often marketed and used as a metal substitute, Delrin is a lightweight, low-friction, and wear-resistant plastic capable of operating in temperatures in excess of 90 degrees celsius (approx 200 degrees Fahrenheit).

Other names for this compound include: polyoxymethylene (POM), acetal resin, polytrioxane and polyformaldehyde.

The Food and Drug Administration has approved Delrin for use in the food industry. Delrin was used by Mattel from 1968 to 1972 to produce the low-friction wheel bearings found on redline Hot Wheels. Delrin is made from acetal homopolymer resin & when extruded into large basic shapes (i.e.- sheets, rods & tubes) tends to be subject to porosity problems. These porosity problems can make the product less reliable in certain applications. Acetal copolymer (Acetron GP) is often used as a replacement for Delrin (acetal homopolymer) when porosity risk is a factor in material selection.

It is also used extensively in paintball markers, where it is used to make bolts, pump handles and many other parts. Its low cost, adequate strength, light weight and self lubricating properties make it ideal for markers. Its competition in this area, Nylatron, while slightly lighter is more prone to swelling. A swelled part can make the mechanism impossible to operate and sometimes even damages the marker. Nylon-based products such as Nylatron have better wear-resistance than Delrin, but do not have good moisture-resistance, and therefore not suitable to high-humidity or underwater appplications.

Another recent use for Delrin is in the manufacturing of Irish flutes (traditionally made of wood) and tin whistles (traditionally made of metal). Delrin flutes sound similar or identical to wooden flutes but have none of the shrinkage or cracking issues usually associated with wooden instruments in hot, cold, or dry environments. Builders such as Des Seery, Michael Cronnolly of M&E Flutes, and Tony Dixon all build Delrin flutes.

Delrin has become an increasingly popular material in the fabrication of guitar picks. It has excellent durability; it is much more resistant to wear than nylon at the point of string contact, especially on round wound strings. Delrin does not crack or break like celluloid or polyvinyl chloride (PVC), provides a solid, slip-free grip, and develops a "memory" over time—that is, it gradually develops a slight curvature that conforms to the user's grip.

Delrin is also much treasured by many makers and players of harpsichords, being used for the plectra which pluck the strings when a key is pressed. Delrin has been found to provide a tonal quality very similar to the bird-quill used in the heyday of the instrument, while being far more durable and consistent.

Delrin is used to make the combination wheels in most high security safe locks. Using delrin in the wheels makes the lock resistant to decoding by x-raying because of delrin's low density. However, neutron bombardment techniques may still be used to decode delrin combination wheels. Delrin also increases the locks resistance to wear.

It is also used to make frame sliders and knee pucks for motorcycle riders/racers.

Delrin is gaining popularity for the manufacture of diving equipment, due to its light weight and its low porosity to gas under pressure. Some other plastics can absorb gas under pressure, and swell or deform.

If it works for HOT WHEELS it will work on a Diablo!