623ZZ 623-2RS Z3 V3 Grade Quality Ball Bearing

Both 623ZZ and 623-2RS are deep groove ball bearings with an inner diameter of 3mm, an outer diameter of 10mm, and a width of 4mm. The former features metal dust covers on both sides, while the latter has rubber seals on both sides. Both bearings share an ABEC-1 precision rating. The designation Z3 indicates lower vibration levels, and V3 signifies reduced noise levels. These bearings are suitable for applications demanding low vibration and noise, such as motors and instruments.

Technical parameter:

The structural features of 623ZZ and 623-2RS bearings primarily include the following aspects:

Basic Structure: Both are single-row deep groove ball bearings, consisting of an inner ring, an outer ring, a set of steel balls, and a set of retainers. Both the inner and outer rings feature deep groove raceways where the steel balls roll. The retainer evenly separates the balls to prevent collision and friction between them.

Sealing Structure: The 623ZZ bearing features metal dust shields on both sides, providing non-contact sealing. This design prevents dust and contaminants from entering the bearing while allowing a certain amount of grease to remain inside. The 623-2RS bearing employs rubber seals on both sides. These contact seals provide superior sealing performance, effectively preventing dust and moisture intrusion while retaining internal lubricant to minimize leakage.

Material Selection: Typically, the inner ring, outer ring, and balls are made of high-carbon chromium steel, such as 52100 chrome steel, which offers high hardness and wear resistance, ensuring bearing longevity and load capacity. The cage is generally stamped from steel plate, though some use stainless steel, such as 300 series stainless steel, to enhance cage strength and corrosion resistance.

Precision Grade: Both bearings share an ABEC-1 precision rating. This grade meets general precision machinery requirements, ensuring rotational accuracy and stability.

Clearance Design: The bearings incorporate radial clearance, typically designated as CN (standard clearance). This design enables the bearings to handle radial loads while accommodating minor axial loads, adapting to diverse operating conditions.