RWM always strives to offer its customers the absolute best in material quality because we understand that there is no benefit to anyone by using sub-par materials. Having to replace a poor quality part always costs more than purchasing the quality one in the first place.
RWM Casters has always been known as the leader in new product development and has put its extensive experience and engineering capabilities to work towards sourcing, testing and producing wheels using the best possible material.
There are two primary types of polyurethane. They are known as PPG and PTMEG. While the rest of the world uses PPG compounds because they are cheaper, RWM knows that a superior wheel is produced using the PTMEG material.
The following are the properties that are used to compare different polyurethanes:
Between the PPG material used by other companies and the PTMEG material used by RWM, it is plain to see that the PTMEG material is the superior of the two types thus giving you a superior product for your application. Below is a table comparing two type-representative materials.
|Tensile Strength (PSI)||4510||7500|
|100% Modulus (PSI)||1705||2200|
|300% Modulus (PSI)||3560||5000|
|Elongation at Break (%)||335||350|
|Die C Tear (PLI)||385||400|
|Split Tear (PLI)||134||130|
|Compression Set (%)||29||32|
|Bashore Rebound (%)||37||48|
When you buy from RWM Casters, you can be confident that you are getting a wheel that will last longer, take higher loads, absorb shock better, resist abrasion and tearing, will not flat spot and simply provides a better value to the customer.
|Wheel Type||Tread Material||Durometer||Scale|
|SR||Soft Tread Rubber||70 - 80||A|
|HR||Hard Tread Rubber||75 - 85||D|
|DU||Phenolics||145 - 150||R|
|UI, UT, UO, UW, UP, UA, INF||Polyurethane||90-95||A|
|UI, UT, UW||80 A Polyurethane||80-85||A|
|UI, UT, UW, SU, MU||70D Polyurethane||70-75||D|
|RI, RA, SW||Rubber||70-80||A|