The 3-D Printed Record Weight.
The ShotPuck Model One is a record weight that features 5 chambers loaded with #9 lead shot. In fact 76.3% of the ShotPuck's total mass is #9 lead shot. Each chamber contains precisely 36.7grams of the shot. Total weight of the assembled record weight is 234.4 grams. (8.3 oz)
For a full description of this products design goals and construction please see the link to the -info page- at the top portion of this page.
briefly; the purpose of this record weight is the same as any record weight; to dampen vibrations running through the record as it is being played.
This design makes use of #9 lead shot in the same way as a sand box platform makes use of sand.
Very much like a sand box, the individual lead shot vibrate against one another when stimulated by an external source of vibration. This implies that the individual shot act as a conduit through which vibrations travel. However, because the individual shot are in intimate contact with a large mass of shot, there is not enough energy coming from the source stimulant to force the vibrations to pass completely through the chamber. Ergo vibrations go in, they are dissipated and die within the shot chamber. When this theory is executed properly within a record puck, the end effect is that the reduction in record vibrations result in a cleaner sounding playback.
*(Record weights are often nick-named a 'puck'. because the size and shape often resembles a hockey puck)
I have begun production on ShotPuck:Model One record weights and will maintain an inventory to promptly ship all orders. Normally, it takes 1-1/2 days to produce one puck. The 3-D printing process takes 9-1/2 hours to print the main body, for example. The chamber caps are printed separately and take 1-1/2 hrs to print. After printing the puck body is machined to receive (pressed in) a lathe-turned Delrin spindle bushing. Finish coatings are optional and for now will be finished in matte black enamel. As the final assembly operation, silicone foam foot pads are adhered to the bottom of each chamber. Then the ShotPuck: Model One is ready to work.
Thanks for your interest.