Ever wonder how the best reviewed, most durable bumper plates are manufactured?
I shot some video in Qingdao China, showing how we manufacture our OneFitWonder bumper plates:
It all starts with virgin rubber. We choose the best raw materials to go into the bumper plates. Virgin rubber is best because we can control the consistency of the material. This is important because we have strict durometer requirements for our bumpers.
Our 10/15 pound bumper plates have a durometer of 90 shA, while our 25/35/45/55 bumper plates have a durometer of 85 shA.
Different sizes (weights) of bumper plates actually have different stresses upon them- love we change the durometer (hardness) based on the thickness. Thinner bumpers need a more rigid form for durability, while the thicker plates need a bit less hardness/rigidity.
The virgin rubber also allows us to better predict the weight and manufacture a higher quality bumper.
The rubber is processed until smooth, then cut into large donut-shaped discs. These discs are weighed and loaded onto the molds.
The molds are placed on a machine and the machine heats and compresses the molds, forming the bumpers.
Once the bumper plates are done, they are removed from the molds (careful, they are really hot!) and then cooled, weighed and inspected, and then they are off to packing!
Make sure to check out the finished bumper plates!