Rod Guide Ring - Piston Guide Ring https://www.kastas.com/guiding-elements
New Delhi, India, 110006
The cylindrical rollers are in linear contact with the raceways. They have a high radial load capacity and are suitable for high speeds. There are different types designated as NU, NJ, NUP, N, NF (for single-row bearings), NNU, and NN (for double-row bearings depending on the design or absence of side ribs).