The NRT/NRV Series by Schneeberger is a linear roller bearing unit which is designed for medium to heavy loads. It features its unit having high rigidity and high precision. The whole unit comprises of a linear bearing, an adjusting wedge and an attaching part. The wedges is used for adjusting the preload. Along the operation, small angular deviations and deformations in the surrounding happens. This can be compensated through shaping the cylindrically ground wedge bars. Each of its component is made of hardened steel. All units come from a standard design of having a hardened and highly accurate ground steel carrier and two plastic parts that recirculate in the rollers. Its body is made of steel which is precisely grounded and hardened.