Standard bumper plates are all IWF standard, 450mm in diameter with 50.6+/-0.2mm stainless steel inserts. Their surface is matte. Compared with crumb bumper plates, they do not produce much bounce during the exercises. What is more, players can stack more decent bumper plates on the bar due to the thinner thickness. With dead bounce and economy price, they are the best option for garage use.
Black bumper plate
Color bumper plate
Custom made bumper plate
We shelve every piece of hot bumper plate just taken from the production line to do an Air Cooling. After this procedure, our workers will load them on the wooden pallets one by one. This step is mainly to avoid the hot bumper plates getting distorted because of the undistracted heat in the middle.
The collar is stainless steel. We also use Chem Lok as glue to paint them on the side face of the steel before vulcanization. Besides, they hooked the collars by two steel sticks(rebar), so now not only is the rubber plate molded around the insert, but the rubber also gets molded around the rebar as well. This improvement is to eliminate any chance of insert separation.
Aesthetic is always another important factor which influences a lot on customer’s decision. Qingdao Todo Rubber Co., Ltd build a saparate workshop only for color bumper plates in 2017 and this plant brought an obvious improvement on aesthetic refer to color rubber bumper plates.
Screen mold printing, embossed and heat transfer sticker are all met in our factory. For orders with not big demand refer to bumper plates with logo design, we choose screen printing mold to make the logo. We make sure that the painted logo will not be blurred. They will fade out as time goes by, but if our customers have a big demand or they insist on opening the mold(with logo), we will choose the embossed logo. Compared with the screen mold, the embossed mold is expensive, but they just be invested at one time.
The drop test machine is designed for testing the bumper plate drop times. The bumper plate with poor quality cannot last long time on the machine and they will crack after, maybe 100 drop times. 12 seconds for one drop, so appro 300drops in one hour. For standard bumper plates 10kg- 25kg, the drop times can reach 8000times and more; For the crumb bumper plates, the drop times refer to 10kg-25kg can up to 20,000times.
It is notable that poor quality bumper plate will crack, especially on the centre part after hundred drops, even few. The high quality bumper plates cannot avoid being damaged after many dense drops, but take our bumper plates as example, they will mostly do not crack but get loosen.
Why 5kg/10lb bumper plates get cracked in exercises so easily?
5kg is the thinnest plate among the five types(26mm/standard training bumper, 34mm/crumb bumper). Actually 5kg bumper plate is always the first plate to end up in the trash due to warping and/or steel inserts popping out. The fact is that those skinny, 10LB/5kg bumper plates were never met to be loaded onto a barbell all by themselves and then dropped from an overhead position. They simply are not built for it. HI-temp makes some 5kg/10LB the best, but even their 10LB bumper plates cannot take being dropped along on the bar time and time again.
Even we try to increase the life of these skinny bumper plates by altering the geometry of the edge to have a larger and flatter surface area, reinforcing the steel insert and the center portion of the plate with an anchor(hooked design), updating the rubber formulas, they still cannot be kept away from easily damage if players continue to dorp them alone on a bar. No matter what brand or design innovations on the market.
Package & Delivery
The individual packing list will be pasted onto every wooden pallet before delivery. The packing information includes the product name, type(color or black), quantity, order no, and other requested informations.
Packing is the last quality inspection before the delivery. Our packing workers will do the last visual quality inspection in this step. For the package of standard bumper plates, besides the typical package, we’ve also developed our own style. This kind of package can make sure that each pallet loading is correct and we do not worry about the missing or the wrong packed bumper plates during the packing.
As usual, we choose ship by sea to deliver our products to western european market, north amercia, Latin-america, Africa, Oceania, Southeast Asia and East Asia. For Russian customers, we also use train as our another option.