623 Deep Groove Ball Bearings

623 bearing is a widely used miniature single-row deep groove ball bearing with standard dimensions of 3mm×10mm×4mm. This 623 miniature bearing delivers low friction, quiet stable rotation, and reliable radial and light axial load capacity. We supply three mainstream 623 bearing types:623 Open, 623ZZ double metal shield, and 623 2RS double rubber seal. Available in 5 industrial-grade materials including bearing steel, 420 stainless steel, 440 stainless steel, 403 stainless steel, and 316 stainless steel, the versatile 623 bearing fits micro motors, precision instruments, drones, medical devices, and small automated equipment.

623 Bearing Types: Open / ZZ / 2RS

1. 623 Open Bearing

623 Open bearing features an open structure without side seals, creating zero running resistance and excellent heat dissipation. This 623 open bearing supports ultra-high-speed stable operation, making it ideal for clean, dry working environments with regular lubrication maintenance.

Applications: High-speed micro motors, precision laboratory instruments, clean industrial transmission components.

2. 623ZZ Bearing

623ZZ bearing is fitted with double non-contact metal shields to block dry dust and fine particles effectively. The 623ZZ miniature bearing maintains low friction, high temperature resistance, and stable performance, offering high cost performance for dry indoor environments with no waterproof requirements.

Applications: Toy motors, electric tools, office equipment, household appliances, dry automated industrial machinery.

3. 623 2RS Bearing

623 2RS bearing adopts double rubber contact seals to achieve full waterproof, dust-proof, and moisture-proof protection. The fully sealed 623 2RS bearing runs stably in humid, dusty, and harsh working conditions with minimal maintenance.

Applications: Outdoor miniature equipment, cleaning machinery, agricultural small parts, food processing equipment.

623 Bearing Material Introduction And Applications

1. Bearing Steel (GCr15/52100)

Bearing steel 623 bearing (GCr15/52100) provides high hardness, outstanding wear resistance, and strong load capacity. As the standard 623 bearing option, it delivers high precision and cost efficiency for dry high-speed mechanical applications, though it is not rust-proof in corrosive environments.

2. 420 Stainless Steel

420 stainless steel 623 bearing features balanced hardness and anti-rust performance with reliable atmospheric corrosion resistance. This 623 stainless steel bearing is a cost-effective choice for general outdoor equipment and light industrial anti-rust miniature machinery.

3. 440 Stainless Steel

440 stainless steel 623 bearing achieves the highest hardness among stainless steel variants, with superior wear resistance and mild corrosion resistance. This high-precision 623 bearing is widely used in medical devices, waterproof electronic equipment, and light-load marine components.

4. 304 Stainless Steel

403 stainless steel 623 bearing excels in high-temperature resistance and anti-oxidation stability. Designed for extreme heat environments, this 623 bearing operates reliably for high-temperature micro machinery, heating equipment, and thermal ventilation motors.

5. 316 Stainless Steel

316 stainless steel 623 bearing offers premium resistance to acid, alkali, and seawater corrosion with non-magnetic and food-grade sanitary properties. It is the optimal 623 bearing for light-load marine, chemical, pharmaceutical, and corrosive industrial applications.

623 Bearing Selection Guide

High-speed clean working conditions: 623 Open + Bearing Steel

Dry and dusty indoor environments: 623ZZ + Bearing Steel / 420 Stainless Steel

Humid and harsh working scenarios: 623 2RS + 440 / 316 Stainless Steel

High-temperature industrial applications: 623ZZ/2RS + 304 Stainless Steel