For suspension bushings and rollers the choice is rubber vs PU.
PU wins on wear and load capacity under impact.
Rubber damps vibration better and is cheaper for simple seals; dynamic oil seals often stay NBR.
PU trade-offs: stiffer in cold, different NVH, needs precise fit.
We make PU and rubber bushings/rollers from samples.
Describe load and temperature — we advise if PU is worth it.
PU wins on abrasion and tear; rubber wins on damping and oil fit with the right grade. Converting every bushing to PU changes suspension kinematics and noise.
Hardness numbers look similar; impact behaviour does not. Over-hard PU hammers the pin.
Oil and heat for PU depend on the polyurethane grade — not every PU holds hot oil like NBR.
Decide by joint: quarry arm often PU, machine mount often rubber. Send a sample and the load.
