Needle roller bearings NK series

NK series is substantial needle roller bearing, No inner ring, whithout seals.

Needle roller bearing has a small section, but has a higher load bearing capacity, needle roller bearing equipped with a thin and long roller (roller diameter D≤5mm, L/D≥2.5, L is the length of the roller), so the radial structure is compact.

Its inner diameter size and load capacity and other types of bearings at the same time, the outer diameter of the minimum, especially suitable for radial installation size limited support structure. 

All NK series bearings are available.

The installation of fully loaded needle roller bearings is usually carried out using an auxiliary sleeve. At this time, the auxiliary roll or auxiliary sleeve supports the needle roller to prevent the needle from falling out, and the journal lifts the needle roller with its own chamfer Angle. With the needle roller bearing moving slowly inward on the journal, the auxiliary roll or auxiliary sleeve will slowly exit until it is installed to the working position. The outer diameter of the auxiliary roller and auxiliary sleeve should be 0.1-0.3mm smaller than the diameter of the shaft.

The installation of fully loaded needle roller bearings is usually carried out using an auxiliary sleeve. At this time, the auxiliary roll or auxiliary sleeve supports the needle roller to prevent the needle from falling out, and the journal lifts the needle roller with its own chamfer Angle. With the needle roller bearing moving slowly inward on the journal, the auxiliary roll or auxiliary sleeve will slowly exit until it is installed to the working position. The outer diameter of the auxiliary roller and auxiliary sleeve should be 0.1-0.3mm smaller than the diameter of the shaft.