The oil supply of the felt rollers is done from the inside out through a cavity. The upper roller on the material is adjusted by traction springs for the LRF 32 and the LRF 60. The upper roller on the material is adjusted by a pneumatic jack for the LRF 110 and the LRFP 110. The motorized LRF 110 has an upper roller setting on the material which is provided by a pneumatic jack. It has a fixed top roller speed that is provided by a gearmotor with the ability to have a variable top roller speed on demand.