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Adjustable Tungsten Round
3.17 to 3.49 ounces
Pinewood Derby Weight






5035
Adjustable
Tungsten Round
3.17 to 3.49 ounces

In Stock
$18.95
  From Randy:
"Tungsten rounds allow the placement of the bulk of the ballast weight at the desired point. But if the round makes your car too heavy, your options are few. The adjustable round solves this issue by allowing nearly 1/2 ounce of weight flexibility. Leave the slot facing outward, then add one or two tungsten cubes, and tungsten putty as needed to adjust the weight. Just make sure to use epoxy to hold the cubes in place."

Need a drill bit for the Solid Tungsten Round? Click Here and Order Part 5002


What is Tungsten?

The word "tungsten" literally means "a substance of high density", and is derived from the Swedish language, "tung", meaning "heavy," and "sten", meaning "stone." The name is appropriate as tungsten is a metal with one of the highest densities. In fact, tungsten is 1.7 times more dense than lead. Only gold, platinum, and a few other rare and expensive metals have a similar density.

Applications of Tungsten

Tungsten is completely non-toxic and environmentally friendly so it is gaining increased use in weighting applications where lead is not appropriate. For example lead has been banned in many streams, so tungsten is often substituted for lead weight on fishing flies. The high density coupled with the non-toxic nature makes tungsten an ideal metal for this application.

For similar reasons tungsten is a superior product for weighting pinewood derby cars. Tungsten is 3.2 times the density of the no-lead weighting material often used on pinewood derby cars, thus it enables tremendous flexibility in the design of the car. Coincidentally, tungsten has been used by NASCAR for the metal roll cage and as frame ballast to lower the center of gravity of the race car.

How to Use this Product

This Adjustable Tungsten Round is 1 inch in diameter and 15/32 inch thick. Your shipment will contain one Adjustible Tungsten Round and two, 1/4 inch tungsten cubes.

A Tungsten Round can be easily used for pinewood derby car weighting if the weight of the car body, wheels, and axles is less than 1.75 ounces. Drill a 1 inch diameter hole into the bottom of the car body, and then epoxy the Round into the hole. Leave the slot facing outward. Then, after the car is finished, add one or two tungsten cubes, and some tungsten putty as needed to fine tune the weight of the car.

 
 
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