620 series

623, 624, 625, 626, 627, 628 and 629 CE miniature ceramic ball bearings feature high speed, low friction and corrosion resistance. Ideal for micro motors, precision instruments and small power tools with stable performance and long service life.

Classification :

ceramic bearing

Keywords :

miniature ceramic ball bearing, hybrid ceramic bearing, high speed small ceramic bearing, micro motor ceramic bearing, non magnetic ceramic bearing

+8613561736033

info@jnyjbearing.com

E-mail

🔥 Hot Model

Model	d×D×B (mm)
623	3×10×4
624	4×13×5
625	5×16×5
626	6×19×6
627	7×22×7
628	8×24×8
629	9×26×8

✅ Key Features

Ultra-small size for limited installation space
High speed, low noise and low vibration
Ceramic rolling elements for less heat and longer life
Rustproof, corrosion resistant and non-magnetic
Maintenance-free operation in clean environments
Fully interchangeable with international standard sizes

💼 Applications

Micro motors & small fans

Precision instruments & dental tools

Hobby models & electronic equipment

Small power tools & beauty devices

Office & home appliance movements

Full Ceramic & Hybrid Ceramic Bearings

Category Overview

Ceramic Bearings are high-performance bearings made from advanced ceramic materials such as silicon nitride (Si₃N₄) and zirconia (ZrO₂). Compared with traditional steel bearings, they feature lighter weight, higher hardness, corrosion resistance, high-temperature resistance, and low friction. We provide both full ceramic bearings and hybrid ceramic bearings with standard international sizes, widely used in high-speed equipment, precision instruments, food machinery, medical devices, and harsh working environments.

Our Series Breakdown

Series	Features	Typical Applications
Full Ceramic Bearings	All-ceramic rings and rolling elements, corrosion-proof, insulation, high temperature resistance, non-magnetic, long service life	Medical equipment, chemical machinery, food processing, high-temperature equipment, precision instruments
Hybrid Ceramic Bearings	Ceramic balls with steel rings, high speed, high rigidity, low noise, long fatigue life, better cost performance	High-speed motors, machine tool spindles, electric tools, bicycle hubs, dental handpieces

Core Advantages

Extremely high hardness and wear resistance for longer service life
Excellent corrosion resistance and insulation performance
Lightweight design reduces inertia and improves high-speed stability
Low friction coefficient, low heat generation, and energy-saving
Non-magnetic, anti-static, suitable for special working environments
Standard dimensions for direct replacement of traditional steel bearings

Typical Applications

Widely used in high-speed spindles, precision motors, medical devices, food machinery, chemical equipment, bicycle parts, dental tools, underwater equipment, and various high-temperature, corrosive, or non-magnetic working conditions.

PRODUCT TESTING

Bearing Forging

Bearing Annealing

Turning Process

Quenching

Bearing Assembly

Bearing Clearance Testing

Grease injection

Bearing Marking

ceramic bearing